CHANGELOG.md

6.2.1 / 2022-02-07
==================
 * perf: improve performance especially of validate and clone #11298 [Uzlopak](https://github.com/Uzlopak)
 * perf: remove regexp-clone #11327 [Uzlopak](https://github.com/Uzlopak)
 * fix(document): handle initing nested properties in non-strict documents #11309
 * fix(query): cast $elemMatch underneath $all #11314
 * fix(populate): respect schema-level strictPopulate option #11290
 * fix: set default for dotted path projection #11293 [noseworthy](https://github.com/noseworthy)
 * fix(model): correctly handle writeConcern.w = 0 when saving #11300
 * fix(model): throw VersionError when saving with no changes and optimisticConcurrency = true #11295
 * fix(query): avoid adding $each to $addToSet on mixed arrays #11284
 * fix(index.d.ts): allow using type: [Schema.Types.ObjectId] for ObjectId arrays #11194
 * fix(index.d.ts): make Types.DocumentArray<> convert type to subdoc, rename TMethods -> TMethodsAndOverrides #11061
 * fix(index.d.ts): support passing generic to createCollection() and `collection()` for integration with MongoDB Node driver's collection class #11131
 * fix(index.d.ts): add strictPopulate to MongooseOptions #11276
 * docs: mark Mongoose 6 as compatible with MongoDB 4 #11320 [JavaScriptBach](https://github.com/JavaScriptBach)
 * docs: remove documentation for useNestedStrict #11313 [mark-langer](https://github.com/mark-langer)
 * docs: add "new" to ObjectId class in aggregate.js docs #11322 [JavanPoirier](https://github.com/JavanPoirier)
 * chore: handle eslint configuration in .eslintrc.json #11326 [Uzlopak](https://github.com/Uzlopak)
 * refactor: add parenthesis for constructors in tests #11330 [apeltop](https://github.com/apeltop)

6.2.0 / 2022-02-02
==================
 * feat(connection+mongoose): add support for continueOnError for syncIndexes #11266 [AbdelrahmanHafez](https://github.com/AbdelrahmanHafez)
 * feat(query): cast literals in `$expr` where possible #10663
 * feat(schema+mongoose): add pluginTags to allow applying global plugins to only schemas with matching tags #9780
 * feat(discriminator): support overwriteModels:true to reuse discriminator names #11244 #10931 [IslandRhythms](https://github.com/IslandRhythms)
 * feat(index.d.ts): add DocType generic param to Model functions that return queries to better support projections #11156
 * feat(error): export MongooseServerSelectionError #11202
 * feat(schematype): add validators, path, isRequired to public API and TypeScript types #11139
 * fix(model): make exists(...) return lean document with _id or null instead of boolean #11142 [AbdelrahmanHafez](https://github.com/AbdelrahmanHafez)
 * fix(model): support storing versionKey in nested paths #10980
 * fix(index.d.ts): add options to `bulkSave()` type def #11201 [Uzlopak](https://github.com/Uzlopak)
 * fix(index.d.ts): better support for query projections #11210 [EugeneKorshenko](https://github.com/EugeneKorshenko)

6.1.10 / 2022-02-01
===================
 * fix(mongoose): correctly handle destructured isValidObjectId #11304
 * fix(mongoose): defer to MongoDB driver isValid() for `isValidObjectId()` #11227

6.1.9 / 2022-01-31
==================
 * fix(query): respect nested schema strict as default when casting query filters #11291
 * fix(mongoose): make isValidObjectId() consistent with isValid(), make `ObjectId()` casting more flexible #11209
 * fix(setDefaultsOnInsert): ignore defaults underneath maps #11235
 * fix(query): avoid setting nested schema properties that are stripped out by strictQuery to undefined in query filter #11291
 * fix: check for all flags in a regex deepequal #11242 [Uzlopak](https://github.com/Uzlopak)
 * fix: replace substr with substring #11278 [Uzlopak](https://github.com/Uzlopak)
 * docs: port for documentation testing in CONTRIBUTING.md #11273 [Uzlopak](https://github.com/Uzlopak)

6.1.8 / 2022-01-24
==================
 * fix(connection): stop leaking sessions in .transaction() #11259 #11256 [Uzlopak](https://github.com/Uzlopak)
 * perf: remove sliced in favor of Array.prototype.slice() #11238 [Uzlopak](https://github.com/Uzlopak)
 * perf: improve setDottedPath #11264 [Uzlopak](https://github.com/Uzlopak)
 * fix(document): handle edge case where NestJS sets String.type = String, mixing up schema definitions #11199
 * fix: remove obsolete code after upgrading to bson4 #11265 [Uzlopak](https://github.com/Uzlopak)
 * fix: remove util.isArray in favor of Array.isArray #11234 [Uzlopak](https://github.com/Uzlopak)
 * fix(index.d.ts): avoid UnpackedIntersection making `findOne().populate()` result non-nullable #11041
 * docs(migration): add note to change default functions to schema #11245 [AbdelrahmanHafez](https://github.com/AbdelrahmanHafez)
 * docs: updated docs and issue templates for new FAQs #11171 [IslandRhythms](https://github.com/IslandRhythms)
 * chore: fix casting benchmark #11262 [Uzlopak](https://github.com/Uzlopak)
 * chore: add mongodb-memory-server to test easier locally #11255 [Uzlopak](https://github.com/Uzlopak)
 * chore: fix testing tsconfig #11243 [Uzlopak](https://github.com/Uzlopak)
 * refactor: move utils.random to test folder #11239 [Uzlopak](https://github.com/Uzlopak)

6.1.7 / 2022-01-17
==================
 * fix(model): correct handling for $push on a nested array #11108
 * fix(update): correctly apply timestamps to update pipelines #11151
 * fix(document): correctly handle modifying array subdocument after setting array subdocument to itself #11172
 * fix(index.d.ts): allow passing options to model() in place of removed `skipInit` #11137
 * fix(aggregate): allow passing verbosity to Aggregate.prototype.explain() #11144
 * fix(index.d.ts): avoid TypeScript inferring _id as any type with HydratedDocument #11085
 * docs: fix Node.js Driver compat link #11214 [wesbos](https://github.com/wesbos)
 * docs: remove extraneous backquote #11204 [joebowbeer](https://github.com/joebowbeer)

6.1.6 / 2022-01-10
==================
 * perf(document): delay creating document event emitter until used to improve memory usage, several small improvements to improve initing docs with large arrays #10400
 * fix(model): avoid `bulkSave()` error when `versionKey: false` #11186 #11071 [IslandRhythms](https://github.com/IslandRhythms)
 * fix(model): revert #11079: `findByIdAndUpdate(undefined)` breaking change #11149
 * fix(index.d.ts): support strings in deep populate #11181 [ivalduan](https://github.com/ivalduan)
 * fix(index.d.ts): rename map() -> transform() to line up with change in v6.0 #11161
 * fix(index.d.ts): allow new Model<DocType>(obj) for stricter type checks #11148
 * fix(index.d.ts): make Schema.prototype.pre() and post() generics default to HydratedDocument<DocType> #11180
 * docs: improve autoCreate docs #11116
 * docs(schematype): add missing parameter to example #11185 [kerolloz](https://github.com/kerolloz)
 * docs(connections): use updated link to list of MongoDB Node driver `connect()` options #11184 [splinter](https://github.com/splinter)
 * docs(aggregate): fix formatting #11191 [enieber](https://github.com/enieber)
 * docs: fix broken link #11179 [khairnarsaurabh23](https://github.com/khairnarsaurabh23)

6.1.5 / 2022-01-04
==================
 * perf(index.d.ts): simplify Schema typedef for query helpers and methods to significantly reduce TS compiler overhead #10349
 * fix(document): allow populating deeply nested models as strings #11168 #11160 [AbdelrahmanHafez](https://github.com/AbdelrahmanHafez)
 * fix(query): allow calling limit() and skip() with a string #11017
 * fix(cursor): propery apply selected fields when loading discriminator docs with query cursor #11130
 * fix(mongoose+connection): clone schema correctly when passing instance of another Mongoose instance's Schema to Connection.prototype.model() #11047
 * fix(index.d.ts): handle primitives with FlattenMaps #11117
 * fix(index.d.ts): enforce id on lean query result type #11118
 * fix(index.d.ts): export facet stage type #11150 [mhoc](https://github.com/mhoc)
 * fix(index.d.ts): correct return type of projection method #11176 [EugeneKorshenko](https://github.com/EugeneKorshenko)
 * fix(index.d.ts): additional fix for `$group` pipeline stage #11140 #11067 [EugeneKorshenko](https://github.com/EugeneKorshenko)
 * docs: update CONTRIBUTING.md for TS tests #11164 [ahmedelshenawy25](https://github.com/ahmedelshenawy25)
 * docs: use es6 object destructuring instead of regular dot operator for accessing value in object #11147 [Shivaansh-Agarwal](https://github.com/Shivaansh-Agarwal)

6.1.4 / 2021-12-27
==================
 * fix(document): handle save with undefined nested doc under subdoc #11110
 * fix(document): allow manually populating subdocument refs with `create()` #10856
 * fix(populate): handles refPath underneath map of subdocuments #9359
 * fix(update): throw error when calling findByIdAndUpdate with undefined id #11079 [gramliu](https://github.com/gramliu)
 * fix(mongoose): export ConnectionStates #11133 [orgads](https://github.com/orgads)
 * fix(index.d.ts): unpack array when using generic type override with `populate()` #11027
 * fix(index.d.ts): fix typings in Merge stage #11132
 * fix(index.d.ts): PipelineStage.Merge interface definition is wrong #11109
 * docs(typescript): add note about Schema.Types.ObjectId vs Types.ObjectId in document definition #10949
 * docs(connection): clarify that "connected" and "open" are different #10886
 * docs(populate): correct refPath example to not use on as a schema path name #11113
 * docs: fix `strictQuery` example #11135 [MontgomeryWatts](https://github.com/MontgomeryWatts)

5.13.14 / 2021-12-27
====================
 * fix(timestamps): avoid setting createdAt on documents that already exist but dont have createdAt #11024
 * docs(models): fix up nModified example for 5.x #11055

6.1.3 / 2021-12-21
==================
 * perf(populate): avoid duplicate model names when using refPath to avoid O(n^2) memory growth with number of array elements #10983
 * fix(schema+model): cast paths marked with ref when hydrating #11052
 * fix(schema): handle default function that returns null on document arrays #11058
 * fix(document): clean modified paths when setting deeply nested subdocument #11060
 * fix(populate): report full path when throwing strictPopulate error with deep populate #10923
 * fix(connection): allow calling `setClient()` when disconnected #11114 [hustxiaoc](https://github.com/hustxiaoc)
 * fix(index.d.ts): fix typings in Group stage #11124 [DavideViolante](https://github.com/DavideViolante)
 * fix(index.d.ts): add Mongoose.prototype.trusted() function to type defs #10957
 * fix(index.d.ts): allow use type string in $unset update with aggregation pipeline #11107 [rpenido](https://github.com/rpenido)
 * fix(index.d.ts) treat _id like other fields in $project #11102
 * docs(migrating_to_6): add omitUndefined to Mongoose 6 migration guide #10672
 * docs: add MongooseDocumentArray to API docs #10998
 * docs: fix typo in model.js #11121 [eltociear](https://github.com/eltociear)
 * docs: fix typo in validation.md #11103 [warlock1996](https://github.com/warlock1996)

6.1.2 / 2021-12-14
==================
 * fix: upgrade mongodb driver to 4.2.2 #11092 [lorand-horvath](https://github.com/lorand-horvath)
 * fix(model): respect discriminators when calling Model.watch() #11007
 * fix(populate): allow referencing parent connection models by name when using `useDb()` #11003
 * fix(query): support options param to `Query.prototype.countDocuments()` #11037
 * fix(query): correctly use awaitData instead of awaitdata in `Query.prototype.tailable()` #10875
 * fix(index.d.ts): fix replaceRoot type #11098 [alibehroozi](https://github.com/alibehroozi)
 * fix(index.d.ts): add missing syncIndexes() definition to Mongoose global and Connection class #11065
 * fix(index.d.ts): add boolean type for transform option #11057 [AliYusuf95](https://github.com/AliYusuf95)
 * docs(model.estimatedDocumentCount): add await into example to get value from the Query #11044 [olecom](https://github.com/olecom)
 * docs: fix broken build from awaitdata comment #11096 [medolino](https://github.com/medolino)
 * docs: correct Query.prototype.transform() docs #11094 [medolino](https://github.com/medolino)

6.1.1 / 2021-12-09
==================
 * fix(document): allow setting nested path to instance of document #11011
 * fix(update): respect strict option when casting array filters #11062
 * fix(index.d.ts): allow SchemaTypes.Mixed for all schema definition properties to allow using union types #10900
 * fix(index.d.ts): correct types for Schema.prototype.obj and `Model.schema` #10895
 * docs(migrating_to_6): add note about Types.ObjectId() being a class and requiring `new` #10960

6.1.0 / 2021-12-07
==================
 * feat(populate): support ref on subdocuments #10856
 * feat(document): add `ownerDocument()` method to top-level document for consistency with subdocs #10884 [IslandRhythms](https://github.com/IslandRhythms)
 * fix: upgrade to mongodb driver 4.2.1 #11032 #10985 [lorand-horvath](https://github.com/lorand-horvath) [has-n](https://github.com/has-n)
 * feat(schema): support `timeseries` option for MongoDB 5 time series collections support #10611
 * feat(mongoose): add global `strictPopulate` option #10694 [IslandRhythms](https://github.com/IslandRhythms)
 * feat(mongoose+connection): add global `mongoose.syncIndexes()` and `Connection.prototype.syncIndexes()` #10893 [IslandRhythms](https://github.com/IslandRhythms)
 * feat(query): support removing fields from projections #10630 [canac](https://github.com/canac)
 * feat(aggregate): add unionWith method to aggregate #10961 [saeidasadi](https://github.com/saeidasadi)
 * fix(index.d.ts): types for aggregation pipeline stages #10971 [jeremyben](https://github.com/jeremyben)

6.0.15 / 2021-12-06
===================
 * fix(document): avoid overwriting schema methods when creating a new document with `new Model()` and `strict: false` #11001
 * fix(document): avoid overwriting top-level document _id with nested `_id` when `strict = false` #10934
 * fix(collection): avoid double-calling callback on sync error #10956
 * fix(connection): handle direct connection to uninitialized replica set that then becomes initialized #10948
 * fix(index.d.ts): allow partial updates on subdocuments for defaults #10947
 * fix(index.d.ts): handle buffer type in schema definitions #11026

6.0.14 / 2021-11-29
===================
 * fix(document): catch errors in required functions #10968
 * fix(connection): clone schema when passing a schema from a different copy of Mongoose to `Connection#model()` #10904
 * fix(populate): set empty array [] on virtual populate with no result #10992
 * fix(query): handle orFail() with replaceOne() #10963
 * fix(populate): use Model by default when using Model.populate() on a POJO #10978
 * fix(document): throw VersionError if saving a document with version bump and document isn't found #10974
 * fix(index.d.ts): make populate type param optional #10989 [mohd-akram](https://github.com/mohd-akram)
 * docs(migrating_to_6): add a note about minimize and toObject() behavior change in v5.10.5 #10827
 * docs: remove duplicate `path` in docs #11020 [ItWorksOnMyMachine](https://github.com/ItWorksOnMyMachine)
 * docs: fix typo in populate docs #11015 [gavi-shandler](https://github.com/gavi-shandler)
 * docs: fix typo in model.js #10982 [eltociear](https://github.com/eltociear)

6.0.13 / 2021-11-15
===================
 * fix(document): allows validating doc again if pre validate errors out #10830
 * fix: upgrade to mongodb driver 4.1.4 #10955 [mohd-akram](https://github.com/mohd-akram)
 * fix(schema): handle functions with accidental type properties in schema definitions #10807
 * fix(path): add check to avoid flattening dotted paths on Mongoose docs, improve error when flattening dotted paths causes conflicts #10825
 * fix(index.d.ts): rename EnforceDocument -> HydratedDocument, export HydratedDocument for easier typing for users #10843
 * fix(index.d.ts): handle maps in TypeScript schema definitions #10838
 * fix(index.d.ts): add clone to query #10943 [asportnoy](https://github.com/asportnoy)
 * fix(index.d.ts): add strictQuery global option #10933
 * fix(index.d.ts): add generic to allow overriding `Schema#clone()` return type #10951 [StefanoA1](https://github.com/StefanoA1)
 * docs(typescript): add quick guide to virtuals in TypeScript #10754
 * docs(aggregate): remove exec() from AggregationCursor example, no longer correct for Mongoose 6 #10862
 * docs(document.js): fix link leading to old github pages site #10958 [PuneetGopinath](https://github.com/PuneetGopinath)
 * docs: fixed typo in document.js #10950 [Haosik](https://github.com/Haosik)

5.13.13 / 2021-11-02
====================
 * fix: upgrade to mongodb@3.7.3 #10909 [gaurav-sharma-gs](https://github.com/gaurav-sharma-gs)
 * fix: correctly emit end event in before close #10916 [iovanom](https://github.com/iovanom)
 * fix(index.d.ts): improve ts types for query set #10942 [jneal-afs](https://github.com/jneal-afs)

6.0.12 / 2021-10-21
===================
 * fix(cursor): remove the logic for emitting close, rely on autoDestroy option for Node 12 support #10906 [iovanom](https://github.com/iovanom)
 * fix(map): support passing flattenMaps: false to Map toJSON(), make `toJSON()` flatten maps by default in TypeScript #10872
 * fix: upgrade to mongodb driver 4.1.3 #10911 [orgads](https://github.com/orgads)
 * fix(index.d.ts): correct TS function signature for `SchemaType.prototype.set()` #10799
 * fix(index.d.ts): support implicit $in in FilterQuery #10826
 * fix(index.d.ts): More precise type for Schema.clone() #10899 [coyotte508](https://github.com/coyotte508)
 * fix(index.d.ts): add caster property to schema arrays and document arrays #10865
 * docs: update `updateMany()` and `deleteMany()` docs to reflect new `matchedCount`, `modifiedCount`, `deletedCount` properties #10908 [IslandRhythms](https://github.com/IslandRhythms)
 * docs: fix broken links to populate virtuals #10870 [IslandRhythms](https://github.com/IslandRhythms)
 * docs: updated docs to have returnOriginal, removed new and returnDocument #10887 [IslandRhythms](https://github.com/IslandRhythms)

5.13.12 / 2021-10-19
====================
 * fix(cursor): use stream destroy method on close to prevent emitting duplicate 'close' #10897 [iovanom](https://github.com/iovanom)
 * fix(index.d.ts): backport streamlining of FilterQuery and DocumentDefinition to avoid "excessively deep and possibly infinite" TS errors #10617

6.0.11 / 2021-10-14
===================
 * perf(index.d.ts): remove some unnecessary definitions, streamline some union types to reduce number of instantiations #10349
 * fix(cursor): use stream destroy method on close to prevent emitting duplicate 'close' #10878 #10876 [iovanom](https://github.com/iovanom)
 * fix: create indexes when readPreference=primary is set #10861 #10855 [gemyero](https://github.com/gemyero)
 * fix(document): avoid depopulating when setting array of subdocs from different doc #10819
 * fix(index.d.ts): allow modifying properties of UpdateQuery instances #10786
 * fix(index.d.ts): add generic Paths to populate() to allow overriding path types #10758

5.13.11 / 2021-10-12
====================
 * fix: upgrade mongodb -> 3.7.2 #10871 [winstonralph](https://github.com/winstonralph)
 * fix(connection): call setMaxListeners(0) on MongoClient to avoid event emitter memory leak warnings with `useDb()` #10732

6.0.10 / 2021-10-08
===================
 * fix(query): add back strictQuery option to avoid empty filter issues, tie it to `strict` by default for compatibility #10781 #10763
 * fix(model): avoid unnecessarily dropping text indexes in `syncIndexes()` #10851 #10850 [IslandRhythms](https://github.com/IslandRhythms)
 * fix(query): avoid trying to call toArray() on cursor if find() error occurred #10845
 * fix: accepts uppercase values in mongoose.isValidObjectId #10846 [foxadb](https://github.com/foxadb)
 * perf(document): further reduce unnecessary objects and keys to minimize document memory overhead #10400
 * fix(index.d.ts): restore unpacked type and avoid distributive conditional types #10859 [dbellavista](https://github.com/dbellavista)
 * fix(index.d.ts): add correct null typings for `findOneAndUpdate()` and `findByIdAndUpdate()` #10820
 * fix(index.d.ts): make insertMany() correctly return Promise<Array> if passing single document to `insertMany()` #10802
 * fix(index.d.ts): avoid weird issue where TypeScript 4.3.x and 4.4.x makes string extend Function #10746
 * fix(index.d.ts): allow type: `SchemaTypeOptions[]` when defining schema #10789
 * fix(index.d.ts): allow using `$in` with enum fields #10757 #10734
 * fix(index.d.ts): add missing fields and options params to Model constructor #10817
 * fix(index.d.ts): support extending type for mongoose.models #10806 [MunifTanjim](https://github.com/MunifTanjim)
 * docs: enhance docs section linking #10779 [saveman71](https://github.com/saveman71)
 * docs(middleware): add missing query middleware #10721
 * docs: fix typo #10853 [mdatif796](https://github.com/mdatif796)
 * docs: add missing to #10848 [digidub](https://github.com/digidub)

5.13.10 / 2021-10-05
====================
 * fix(index.d.ts): allow using type: SchemaDefinitionProperty in schema definitions #10674
 * fix(index.d.ts): allow AnyObject as param to findOneAndReplace() #10714

6.0.9 / 2021-10-04
==================
 * fix(document): init non-schema values if strict is set to false #10828
 * fix(document): correctly track saved state for deeply nested objects #10773
 * fix(array): avoid mutating arrays passed into Model() constructor #10766
 * fix(cursor): allow using find().cursor() before connecting, report errors in pre('find') hooks when using `.cursor()` #10785
 * fix(populate): support ref: Model with virtual populate #10695
 * fix(schema): support type: { subpath: String } in document array definitions and improve schema `interpretAsType` error messages if type name is undefined #10750
 * fix: upgrade to mongodb driver 4.1.2 #10810 [orgads](https://github.com/orgads)
 * fix(subdocument): add extra precaution to throw an error if a subdocument is a parent of itself in `ownerDocument()` #9259
 * perf(index.d.ts): make `model()` call more strict to improve VS Code autocomplete perf #10801 [traverse1984](https://github.com/traverse1984)
 * fix(index.d.ts): allow calling depopulate with 0 args #10793
 * fix(index.d.ts): Add type definitions for allowDiskUse #10791 [coyotte508](https://github.com/coyotte508)
 * docs(populate): expand virtual populate docs with info on principle of least cardinality and other info #10558
 * docs: add migration guide to side bar #10769
 * docs(connections+api): clarify that maxPoolSize is now 100 by default #10809
 * docs(schema): add Schema#virtuals to docs as a public property #10829
 * docs: remove array indexes section from FAQ #10784 [Duchynko](https://github.com/Duchynko)
 * docs(model): fix broken example #10831 [Okekeprince1](https://github.com/Okekeprince1)
 * docs: fix markdown issue with schemas.md #10839 [aseerkt](https://github.com/aseerkt)

6.0.8 / 2021-09-27
==================
 * fix: support $set on elements of map of subdocuments #10720
 * fix(schematype): handle schema type definition where unique: false and `index` not set #10738
 * fix(timestamps): handle `createdAt` with custom `typeKey` #10768 #10761 [jclaudan](https://github.com/jclaudan)
 * fix(model): amend Model.translateAliases to observe non-aliased sub schemas #10772 [frisbee09](https://github.com/frisbee09)
 * fix: allow ObjectId#valueOf() to override built-in `Object#valueOf()`, clarify using `==` with ObjectIds in migration guide #10741
 * fix: use process.emitWarning() instead of console.warn() for warnings #10687
 * fix(index.d.ts): allow array of schema type options for string[], `number[]` property Schema definitions #10731
 * fix(index.d.ts): make built-in subdocument properties not required in UpdateQuery #10597
 * docs(ssl): correct sslCA option and clarify that sslCA should be the path to the CA file #10705

6.0.7 / 2021-09-20
==================
 * fix(populate): wrap populate filters in trusted() so they work with `sanitizeFilter` #10740
 * fix(aggregate): handle calling aggregate() before initial connection succeeds #10722
 * fix(query): avoid throwing error when using `$not` with `$size` #10716 [IslandRhythms](https://github.com/IslandRhythms)
 * fix(discriminator): handle setting nested discriminator paths #10702
 * fix(documentarray): don't throw TypeError on DocumentArray#create() when top-level doc has populated paths #10749
 * fix(update): avoid setting single nested subdoc defaults if subdoc isn't set #10660
 * fix: delay creating id virtual until right before model compilation to allow plugins to disable the `id` option #10701
 * fix(connection): correct `auth` object when using `user` option to `connect()` #10727 #10726 [saveman71](https://github.com/saveman71)
 * fix(timestamps): avoid calling getters when checking whether `createdAt` is set #10742 [kaishu16](https://github.com/kaishu16)
 * fix(index.d.ts): allow using strings for ObjectIds with $in #10735
 * fix(index.d.ts): add TVirtuals generic to Model to make it easier to separate virtuals from DocType #10689
 * fix(index.d.ts): add Model.bulkSave() definition #10745
 * fix(index.d.ts): allow RegExp for `match` in schema definition #10744 [easen-amp](https://github.com/easen-amp)
 * fix(index.d.ts): allow arbitrary additional keys in QueryOptions #10688
 * docs: correct TypeScript schema generic params in docs #10739 [minifjurt123](https://github.com/minifjurt123)
 * docs: fix h2 header links #10682 [IslandRhythms](https://github.com/IslandRhythms)

6.0.6 / 2021-09-15
==================
 * perf(index.d.ts): streamline SchemaDefinitionType and SchemaTypeOptions to reduce number of instantiations and speed up lib checking #10349
 * perf(document): make $locals a getter/setter, avoid creating unnecessary `undefined` properties in Document constructor, remove unnecessary event listeners #10400
 * fix(connection): use username parameter for MongoDB driver instead of user #10727 [saveman71](https://github.com/saveman71)
 * fix(update): handle casting $or and $and in array filters #10696
 * fix(connection): allow calling connection helpers before calling `mongoose.connect()` #10706
 * fix(document): correctly handle subpaths of arrays that contain non-alphanumeric chars like `-` #10709
 * fix(index.d.ts): correct return value for findOneAndUpdate(), `findByIdAndUpdate()` to support query helpers #10658
 * fix(index.d.ts): add missing methods to ValidationError & ValidatorError classes #10725 [medfreeman](https://github.com/medfreeman)
 * perf(subdocument): make internal $isSingleNested and `$isDocumentArrayElement` properties constants on the prototype rather than setting them on every instance #10400
 * docs: improve Document#populate documentation, tests #10728 [saveman71](https://github.com/saveman71)

6.0.5 / 2021-09-06
==================
 * fix(model): allow calling Model.validate() static with POJO array #10669
 * fix(cast): let $expr through in query filters if strict mode enabled #10662
 * fix(map): propagate flattenMaps option down to nested maps #10653
 * fix(setDefaultsOnInsert): avoid adding unnecessary auto _id to $setOnInsert #10646
 * fix(schema): support object with values and message syntax for Number enums #10648
 * fix(index.d.ts): fix Document#populate() type #10651 [thiagokisaki](https://github.com/thiagokisaki)
 * fix(index.d.ts): allow using $in and $nin on array paths #10605
 * fix(index.d.ts): make _id required in query results and return value from `create()` #10657
 * docs: update deprecations.md to reflect version 6 #10673 [multiwebinc](https://github.com/multiwebinc)
 * docs: fix typo in queries.md #10681 [yogabonito](https://github.com/yogabonito)
 * docs: fix typo in models.md #10680 [yogabonito](https://github.com/yogabonito)
 * ci: add test for ubuntu-20.04 #10679 [YC](https://github.com/YC)

5.13.9 / 2021-09-06
===================
 * fix(populate): avoid setting empty array on lean document when populate result is undefined #10599
 * fix(document): make depopulate() handle populated paths underneath document arrays #10592
 * fix: peg @types/bson version to 1.x || 4.0.x to avoid stubbed 4.2.x release #10678
 * fix(index.d.ts): simplify UpdateQuery to avoid "excessively deep and possibly infinite" errors with `extends Document` and `any` #10647
 * fix(index.d.ts): allow specifying weights as an IndexOption #10586
 * fix: upgrade to mpath v0.8.4 re: security issue #10683

6.0.4 / 2021-09-01
==================
 * fix(schema): handle maps of maps #10644
 * fix: avoid setting defaults on insert on a path whose subpath is referenced in the update #10624
 * fix(index.d.ts): simplify UpdateQuery to avoid "excessively deep and possibly infinite" errors with `extends Document` and `any` #10617
 * fix(index.d.ts): allow using type: [documentDefinition] when defining a doc array in a schema #10605
 * docs: remove useNewUrlParser, useUnifiedTopology, some other legacy options from docs #10631 #10632
 * docs(defaults): clarify that setDefaultsOnInsert is true by default in 6.x #10643
 * test: use async/await instead of co #10633 [AbdelrahmanHafez](https://github.com/AbdelrahmanHafez)

6.0.3 / 2021-08-30
==================
 * fix: handle buffering with find() now that find() no longer accepts a callback #10639 #10634 #10610

6.0.2 / 2021-08-26
==================
 * fix(query): handle find() when buffering on initial connection #10610
 * fix(populate): get doc schema using $__schema to avoid paths named `schema` #10619
 * docs: use async/await in the quickstart #10610
 * docs: fix links to guide, schematypes, connections in v5.x docs #10607
 * docs: add link to 6.x migration guide to schemas guide #10616
 * docs: add migration to 6.x in Migration Guides section #10618 [HunterKohler](https://github.com/HunterKohler)
 * docs: fix missing URL part on layout.pug #10622 [ItsLhun](https://github.com/ItsLhun)

6.0.1 / 2021-08-25
==================
 * fix(aggregate): allow calling Model.aggregate() with options #10604 [amitbeck](https://github.com/amitbeck)
 * fix(index.d.ts): add instance, options, schema properties to SchemaType class #10609
 * fix(index.d.ts): allow querying array of strings by string #10605
 * fix(index.d.ts): allow using type: SchemaDefinitionProperty in schema definitions #10605
 * fix(index.d.ts): remove strictQuery option #10598 [thiagokisaki](https://github.com/thiagokisaki)
 * docs: add link to migration guide in changelog #10600 [AbdelrahmanHafez](https://github.com/AbdelrahmanHafez)
 * docs: fix docs build for v5.x docs #10607
 * docs(query): add note about strict option to setOptions() #10602

6.0.0 / 2021-08-24
==================
 * Follow the [migration guide](https://mongoosejs.com/docs/migrating_to_6.html) to get a list of all breaking changes in v6.0.
 * BREAKING CHANGE: remove the deprecated safe option in favor of write concerns
 * fix: upgrade to mongodb driver 4.1.1
 * fix: consistently use $__parent to store subdoc parent as a property, and `$parent()` as a getter function #10584 #10414
 * fix: allow calling `countDocuments()` with options

6.0.0-rc2 / 2021-08-23
======================
 * BREAKING CHANGE: make document set() set keys in the order they're defined in the schema, not in the user specified object #4665
 * BREAKING CHANGE: remove most schema reserved words - can now opt in to using `save`, `isNew`, etc. as schema paths #9010 [AbdelrahmanHafez](https://github.com/AbdelrahmanHafez)
 * BREAKING CHANGE: upgrade mquery -> 4.x #10579
 * BREAKING CHANGE: remove some legacy type aliases for TypeScript
 * fix(document): pass depopulated value to array element validators for consistency #10585 #8042

5.13.8 / 2021-08-23
===================
 * fix(populate): handle populating subdoc array virtual with sort #10552
 * fix(model): check for code instead of codeName when checking for existing collections for backwards compat with MongoDB 3.2 #10420
 * fix(index.d.ts): correct value of this for custom query helper methods #10545
 * fix(index.d.ts): allow strings for ObjectIds in nested properties #10573
 * fix(index.d.ts): add match to VirtualTypeOptions.options #8749
 * fix(index.d.ts): allow QueryOptions populate parameter type PopulateOptions #10587 [osmanakol](https://github.com/osmanakol)
 * docs(api): add Document#$where to API docs #10583

6.0.0-rc1 / 2021-08-12
======================
 * feat: upgrade to MongoDB driver 4.1.0 #10567 #10560
 * feat: add `valueOf()` to ObjectId prototype #7299
 * BREAKING CHANGE: rename History.md -> CHANGELOG.md #10542

5.13.7 / 2021-08-11
===================
 * perf(index.d.ts): loosen up restrictions on ModelType generic for Schema for a ~50% perf improvement when compiling TypeScript and using intellisense #10536 #10515 #10349
 * fix(index.d.ts): fix broken `Schema#index()` types #10562 [JaredReisinger](https://github.com/JaredReisinger)
 * fix(index.d.ts): allow using SchemaTypeOptions with array of raw document interfaces #10537
 * fix(index.d.ts): define IndexOptions in terms of mongodb.IndexOptions #10563 [JaredReisinger](https://github.com/JaredReisinger)
 * fix(index.d.ts): improve intellisense for DocumentArray `push()` #10546
 * fix(index.d.ts): correct type for expires #10529
 * fix(index.d.ts): add Query#model property to ts bindings #10531
 * refactor(index.d.ts): make callbacks use the new Callback and CallbackWithoutResult types #10550 [thiagokisaki](https://github.com/thiagokisaki)

5.13.6 / 2021-08-09
===================
 * fix: upgrade mongodb driver -> 3.6.11 #10543 [maon-fp](https://github.com/maon-fp)
 * fix(schema): throw more helpful error when defining a document array using a schema from a different copy of the Mongoose module #10453
 * fix: add explicit check on constructor property to avoid throwing an error when checking objects with null prototypes #10512
 * fix(cursor): make sure to clear stack every 1000 docs when calling `next()` to avoid stack overflow with large batch size #10449
 * fix(index.d.ts): allow calling new Model(...) with generic Model param #10526
 * fix(index.d.ts): update type declarations of Schema.index method #10538 #10530 [Raader](https://github.com/Raader)
 * fix(index.d.ts): add useNewUrlParser and useUnifiedTopology to ConnectOptions #10500
 * fix(index.d.ts): add missing type for diffIndexes #10547 [bvgusak](https://github.com/bvgusak)
 * fix(index.d.ts): fixed incorrect type definition for Query's .map function #10544 [GCastilho](https://github.com/GCastilho)
 * docs(schema): add more info and examples to Schema#indexes() docs #10446
 * chore: add types property to package.json #10557 [thiagokisaki](https://github.com/thiagokisaki)

6.0.0-rc0 / 2021-08-03
======================
 * BREAKING CHANGE: upgrade to MongoDB Node.js driver 4.x. This adds support for MongoDB 5.0, drops support for Node.js < 12.0.0 #10338 #9840 #8759
 * BREAKING CHANGE(connection): make connections not thenable, add `Connection#asPromise()` to use a connection as a promise #8810
 * BREAKING CHANGE: throw an error if the same query object is executed multiple times #7398
 * BREAKING CHANGE: Mongoose arrays are now proxies, which means directly setting an array index `doc.arr[0] = 'test'` triggers change tracking #8884
 * BREAKING CHANGE: make Document#populate() return a promise if a callback isn't passed, remove `execPopulate()` #3834
 * BREAKING CHANGE: virtual getters and setters are now executed in forward order, rather than reverse order. This means you can add getters/setters to populated virtuals #8897 [ggurkal](https://github.com/ggurkal)
 * BREAKING CHANGE: make setDefaultsOnInsert true by default. Set to `false` to disable it. #8410
 * BREAKING CHANGE: throw error by default if populating a path that isn't in the schema #5124
 * BREAKING CHANGE: make schema paths declared with `type: { name: String }` create a single nested subdoc, remove `typePojoToMixed` because it is now always false #7181
 * BREAKING CHANGE: remove context option for queries, always use `context: 'query'` #8395
 * BREAKING CHANGE: array subdocument class now inherits from single subdocument class #8554
 * BREAKING CHANGE: if model is registered on a non-default connection, don't register it on mongoose global #5758
 * BREAKING CHANGE: `Aggregate#cursor()` now returns aggregation cursor, rather than aggregate instance #10410 [IslandRhythms](https://github.com/IslandRhythms)
 * BREAKING CHANGE: `useStrictQuery` is removed, `strict` applies for both #9015
 * BREAKING CHANGE: overwrite instead of merging when setting nested paths #9121
 * BREAKING CHANGE: call ref and refPath functions with subdoc being populated, not top-level doc #8469
 * BREAKING CHANGE: remove useFindAndModify option, always use MongoDB's native `findOneAndReplace()` rather than legacy `findAndModify()` #8737
 * BREAKING CHANGE: always pass unpopulated value to validators #8042 [IslandRhythms](https://github.com/IslandRhythms)
 * BREAKING CHANGE: rename Embedded/SingleNestedPath -> Subdocument/SubdocumentPath #10419
 * BREAKING CHANGE: call setters with priorVal as 2nd parameter, and with new subdocument as context if creating new document #8629
 * BREAKING CHANGE: pass document as first parameter to `default` functions #9633 [AbdelrahmanHafez](https://github.com/AbdelrahmanHafez)
 * BREAKING CHANGE: make filter, flat, flatMap, map, and slice return vanilla JS arrays #8356
 * BREAKING CHANGE: make autoCreate true by default #8814
 * BREAKING CHANGE: clone schema passed to discriminator() #8552
 * BREAKING CHANGE: make autoIndex and autoCreate default to false if connection's read preference is 'secondary' or 'secondaryPreferred' #9374 [chumager](https://github.com/chumager)
 * BREAKING CHANGE: make deepEqual treat objects with different order of keys as different #9571 [AbdelrahmanHafez](https://github.com/AbdelrahmanHafez)
 * BREAKING CHANGE: Make Model.exists() return a query rather than a promise, and resolve to doc or null, rather than true/false #8097
 * BREAKING CHANGE: `Model.create([])` now returns an empty array rather than undefined #8792 [AbdelrahmanHafez](https://github.com/AbdelrahmanHafez)
 * BREAKING CHANGE: `createdAt` schema path is now `immutable` by default #10139 [IslandRhythms](https://github.com/IslandRhythms)
 * BREAKING CHANGE: dont start buffering when database is disconnected #8702
 * BREAKING CHANGE: emit 'disconnected' when losing connectivity to replica set primary #9262
 * BREAKING CHANGE: Make Aggregate#model() always return a model rather than an aggregate instance #7702
 * BREAKING CHANGE: remove omitUndefined option for updates - Mongoose now always removes `undefined` keys in updates #7680
 * BREAKING CHANGE: remove Aggregate#addCursorFlag(), use `Aggregate#options()` instead #8701
 * BREAKING CHANGE: rename Query#map() -> Query#transform() to avoid conflating with Array#map() and chaining #7951
 * BREAKING CHANGE: remove storeSubdocumentValidationError schema option, never store subdocument ValidationErrors #5226
 * BREAKING CHANGE(query): make find() with explain() return object instead of an array #8551
 * BREAKING CHANGE: allow undefined in number arrays unlles `required` #8738
 * BREAKING CHANGE: remove isAsync option for validators in favor of checking if a function is an async function #10502
 * BREAKING CHANGE: drop support for Model#model #8958 [AbdelrahmanHafez](https://github.com/AbdelrahmanHafez)
 * BREAKING CHANGE: remove useNestedStrict, use nested schema strict mode when casting updates unless `strict` is explicitly specified in query options #8961
 * BREAKING CHANGE: remove `safe-buffer`, make MongooseBuffer extend from native Buffer #9199 [AbdelrahmanHafez](https://github.com/AbdelrahmanHafez)
 * BREAKING CHANGE(schema): skip adding id virtual if schema doesn't have an `_id` path #3936
 * BREAKING CHANGE: remove skipInit parameter to mongoose.model() #4625
 * BREAKING CHANGE: make pluralize convert "goose" to "geese" #9278
 * BREAKING CHANGE: the `Schema#noId` option is now removed, please use `_id` instead #9398
 * BREAKING CHANGE: remove MONGOOSE_DRIVER_PATH, use a setDriver() function on Mongoose instance instead #9604
 * feat(mongoose+query): add `sanitizeFilter` option and `mongoose.trusted()` to defend against query selector injection attacks #3944
 * feat(query): add Query#clone() so you can more easily re-execute a query #8708
 * feat(virtual+populate): allow `foreignField` to be a function #8568 [BJvdA](https://github.com/BJvdA)

5.13.5 / 2021-07-30
===================
 * perf(index.d.ts): improve typescript type checking performance #10515 [andreialecu](https://github.com/andreialecu)
 * fix(index.d.ts): fix debug type in MongooseOptions #10510 [thiagokisaki](https://github.com/thiagokisaki)
 * docs(api): clarify that `depopulate()` with no args depopulates all #10501 [gfrancz](https://github.com/gfrancz)

5.13.4 / 2021-07-28
===================
 * fix: avoid pulling non-schema paths from documents into nested paths #10449
 * fix(update): support overwriting nested map paths #10485
 * fix(update): apply timestamps to subdocs that would be newly created by `$setOnInsert` #10460
 * fix(map): correctly clone subdocs when calling toObject() on a map #10486
 * fix(cursor): cap parallel batchSize for populate at 5000 #10449
 * fix(index.d.ts): improve autocomplete for new Model() by making `doc` an object with correct keys #10475
 * fix(index.d.ts): add MongooseOptions interface #10471 [thiagokisaki](https://github.com/thiagokisaki)
 * fix(index.d.ts): make LeanDocument work with PopulatedDoc #10494
 * docs(mongoose+connection): correct default value for bufferTimeoutMS #10476
 * chore: remove unnecessary 'eslint-disable' comments #10466 [thiagokisaki](https://github.com/thiagokisaki)

5.13.3 / 2021-07-16
===================
 * fix(model): avoid throwing error when bulkSave() called on a document with no changes #10437
 * fix(timestamps): apply timestamps when creating new subdocs with `$addToSet` and with positional operator #10447
 * fix(schema): allow calling Schema#loadClass() with class that has a static getter with no setter #10436
 * fix(model): handle re-applying object defaults after explicitly unsetting #10442 [semirturgay](https://github.com/semirturgay)
 * fix: bump mongodb driver -> 3.6.10 #10440 [AbdelrahmanHafez](https://github.com/AbdelrahmanHafez)
 * fix(index.d.ts): consistently use NativeDate instead of Date for Date validators and timestamps functions #10426
 * fix(index.d.ts): allow calling `discriminator()` with non-document #10452 #10421 [DouglasGabr](https://github.com/DouglasGabr)
 * fix(index.d.ts): allow passing ResultType generic to Schema#path() #10435

5.13.2 / 2021-07-03
===================
 * fix: hardcode @types/node version for now to avoid breaking changes from DefinitelyTyped/DefinitelyTyped#53669 #10415
 * fix(index.d.ts): allow using type: Date with Date paths in SchemaDefinitionType #10409
 * fix(index.d.ts): allow extra VirtualTypeOptions for better plugin support #10412
 * docs(api): add SchemaArray to docs #10397
 * docs(schema+validation): fix broken links #10396
 * docs(transactions): add note about creating a connection to transactions docs #10406

5.13.1 / 2021-07-02
===================
 * fix(discriminator): allow using array as discriminator key in schema and as tied value #10303
 * fix(index.d.ts): allow using & Document in schema definition for required subdocument arrays #10370
 * fix(index.d.ts): if using DocType that doesn't extends Document, default to returning that DocType from `toObject()` and `toJSON()` #10345
 * fix(index.d.ts): use raw DocType instead of LeanDocument when using `lean()` with queries if raw DocType doesn't `extends Document` #10345
 * fix(index.d.ts): remove err: any in callbacks, use `err: CallbackError` instead #10340
 * fix(index.d.ts): allow defining map of schemas in TypeScript #10389
 * fix(index.d.ts): correct return type for Model.createCollection() #10359
 * docs(promises+discriminators): correctly escape () in regexp to pull in examples correctly #10364
 * docs(update): fix outdated URL about unindexed upsert #10406 [grimmer0125](https://github.com/grimmer0125)
 * docs(index.d.ts): proper placement of mongoose.Date JSDoc [thiagokisaki](https://github.com/thiagokisaki)

5.13.0 / 2021-06-28
===================
 * feat(query): add sanitizeProjection option to opt in to automatically sanitizing untrusted query projections #10243
 * feat(model): add `bulkSave()` function that saves multiple docs in 1 `bulkWrite()` #9727 #9673 [AbdelrahmanHafez](https://github.com/AbdelrahmanHafez)
 * feat(document): allow passing a list of virtuals or `pathsToSkip` to apply in `toObject()` and `toJSON()` #10120
 * fix(model): make Model.validate use object under validation as context by default #10360 [AbdelrahmanHafez](https://github.com/AbdelrahmanHafez)
 * feat(document): add support for pathsToSkip in validate and validateSync #10375 [AbdelrahmanHafez](https://github.com/AbdelrahmanHafez)
 * feat(model): add `diffIndexes()` function that calculates what indexes `syncIndexes()` will create/drop without actually executing any changes #10362 [IslandRhythms](https://github.com/IslandRhythms)
 * feat(document): avoid using sessions that have ended, so you can use documents that were loaded in the session after calling `endSession()` #10306

5.12.15 / 2021-06-25
====================
 * fix(index.d.ts): add extra TInstanceMethods generic param to `Schema` for cases when we can't infer from Model #10358
 * fix(index.d.ts): added typings for near() in model aggregation #10373 [tbhaxor](https://github.com/tbhaxor)
 * fix(index.d.ts): correct function signature for `Query#cast()` #10388 [lkho](https://github.com/lkho)
 * docs(transactions): add import statement #10365 [JimLynchCodes](https://github.com/JimLynchCodes)
 * docs(schema): add missing `discriminatorKey` schema option #10386 #10376 [IslandRhythms](https://github.com/IslandRhythms)
 * docs(index.d.ts): fix typo #10363 [houssemchebeb](https://github.com/houssemchebeb)

5.12.14 / 2021-06-15
====================
 * fix(schema): check that schema type is an object when setting isUnderneathDocArray #10361 [vmo-khanus](https://github.com/vmo-khanus)
 * fix(document): avoid infinite recursion when setting single nested subdoc to array #10351
 * fix(populate): allow populating nested path in schema using `Model.populate()` #10335
 * fix(drivers): emit operation-start/operation-end events to allow inspecting when operations start and end
 * fix(index.d.ts): improve typings for virtuals #10350 [thiagokisaki](https://github.com/thiagokisaki)
 * fix(index.d.ts): correct constructor type for Document #10328
 * fix(index.d.ts): add `ValidationError` as a possible type for `ValidationError#errors` #10320 [IslandRhythms](https://github.com/IslandRhythms)
 * fix: remove unnecessary async devDependency that's causing npm audit warnings #10281
 * docs(typescript): add schemas guide #10308
 * docs(model): add options parameter description to `Model.exists()` #10336 [Aminoiz](https://github.com/Aminoiz)

5.12.13 / 2021-06-04
====================
 * perf(document): avoid creating nested paths when running `$getAllSubdocs()` #10275
 * fix: make returnDocument option work with `findOneAndUpdate()` #10232 #10231 [cnwangjie](https://github.com/cnwangjie)
 * fix(document): correctly reset subdocument when resetting a map subdocument underneath a single nested subdoc after save #10295
 * perf(query): avoid setting non-null sessions to avoid overhead from $getAllSubdocs() #10275
 * perf(document): pre split schematype paths when compiling schema to avoid extra overhead of splitting when hydrating documents #10275
 * perf(schema): pre-calculate mapPaths to avoid looping over every path for each path when initing doc #10275
 * fix(index.d.ts): drill down into nested arrays when creating LeanDocument type #10293

5.12.12 / 2021-05-28
====================
 * fix(documentarray): retain atomics when setting to a new array #10272
 * fix(query+model): fix deprecation warning for `returnOriginal` with `findOneAndUpdate()` #10298 #10297 #10292 #10285 [IslandRhythms](https://github.com/IslandRhythms)
 * fix(index.d.ts): make `map()` result an array if used over an array #10288 [quantumsheep](https://github.com/quantumsheep)

5.12.11 / 2021-05-24
====================
 * fix(populate): skip applying setters when casting arrays for populate() to avoid issues with arrays of immutable elements #10264
 * perf(schematype): avoid cloning setters every time we run setters #9588
 * perf(get): add benchmarks and extra cases to speed up get() #9588
 * perf(array): improve array constructor performance on small arrays to improve nested array perf #9588
 * fix(index.d.ts): allow using type: [String] with string[] when using SchemaDefinition with generic #10261
 * fix(index.d.ts): support ReadonlyArray as well as regular array where possible in schema definitions #10260
 * docs(connection): document noListener option to useDb #10278 [stuartpb](https://github.com/stuartpb)
 * docs: migrate raw tutorial content from pug / JS to markdown #10271
 * docs: fix typo #10269 [sanjib](https://github.com/sanjib)

5.12.10 / 2021-05-18
====================
 * fix(query): allow setting `defaults` option on result documents from query options #7287 [IslandRhythms](https://github.com/IslandRhythms)
 * fix(populate): handle populating embedded discriminator with custom tiedValue #10231
 * fix(document): allow passing space-delimited string of `pathsToValidate` to `validate()` and `validateSync()` #10258
 * fix(model+schema): support `loadClass()` on classes that have `collection` as a static property #10257 #10254 [IslandRhythms](https://github.com/IslandRhythms)
 * fix(SchemaArrayOptions): correct property name #10236
 * fix(index.d.ts): add any to all query operators to minimize likelihood of "type instantiation is excessively deep" when querying docs with 4-level deep subdocs #10189
 * fix(index.d.ts): add $parent() in addition to parent() in TS definitions
 * fix(index.d.ts): correct async iterator return type for QueryCursor #10253 #10252 #10251 [borfig](https://github.com/borfig)
 * fix(index.d.ts): add `virtualsOnly` parameter to `loadClass()` function signature [IslandRhythms](https://github.com/IslandRhythms)
 * docs(typescript): add typescript populate docs #10212
 * docs: switch from AWS to Azure Functions for search #10244

5.12.9 / 2021-05-13
===================
 * fix(schema): ensure add() overwrites existing schema paths by default #10208 #10203
 * fix(schema): support creating nested paths underneath document arrays #10193
 * fix(update): convert nested dotted paths in update to nested paths to avoid ending up with dotted properties in update #10200
 * fix(document): allow calling validate() and validateSync() with `options` as first parameter #10216
 * fix(schema): apply static properties to model when using loadClass() #10206
 * fix(index.d.ts): allow returning Promise<void> from middleware functions #10229
 * fix(index.d.ts): add pre('distinct') hooks to TypeScript #10192

5.12.8 / 2021-05-10
===================
 * fix(populate): handle populating immutable array paths #10159
 * fix(CastError): add `toJSON()` function to ensure `name` property always ends up in `JSON.stringify()` output #10166 [IslandRhythms](https://github.com/IslandRhythms)
 * fix(query): add allowDiskUse() method to improve setting MongoDB 4.4's new `allowDiskUse` option #10177
 * fix(populate): allow populating paths under mixed schematypes where some documents have non-object properties #10191
 * chore: remove unnecessary driver dynamic imports so Mongoose can work with Parcel #9603
 * fix(index.d.ts): allow any object as parameter to create() and `insertMany()` #10144
 * fix(index.d.ts): allow creating Model class with raw interface, no `extends Document` #10144
 * fix(index.d.ts): separate UpdateQuery from `UpdateWithAggregationPipeline` for cases when `UpdateQuery` is used as a function param #10186
 * fix(index.d.ts): don't require error value in pre/post hooks #10213 [michaln-q](https://github.com/michaln-q)
 * docs(typescript): add a typescript intro tutorial and statics tutorial #10021
 * docs(typescript): add query helpers tutorial #10021
 * docs(deprecations): add note that you can safely ignore `useFindAndModify` and `useCreateIndex` deprecation warnings #10155
 * chore(workflows): add node 16 to github actions #10201 [AbdelrahmanHafez](https://github.com/AbdelrahmanHafez)

5.12.7 / 2021-04-29
===================
 * fix(document): make $getPopulatedDocs() return populated virtuals #10148
 * fix(discriminator): take discriminator schema's single nested paths over base schema's #10157
 * fix(discriminator): allow numbers and ObjectIds as tied values for discriminators #10130
 * fix(document): avoid double validating paths underneath mixed objects in save() #10141
 * fix(schema): allow path() to return single nested paths within document arrays #10164
 * fix(model+query): consistently wrap query callbacks in `process.nextTick()` to avoid clean stack traces causing memory leak when using synchronous recursion like `async.whilst()` #9864
 * fix(cursor): correctly report CastError when using noCursorTimeout flag #10150
 * fix(index.d.ts): add CastError constructor #10176
 * fix(index.d.ts): allow setting mongoose.pluralize(null) in TypeScript #10185
 * docs: add link to transactions guide from nav bar #10143
 * docs(validation): add section about custom error messages #10140
 * docs: make headers linkable via clicking #10156
 * docs: broken link in document.js #10190 [joostdecock](https://github.com/joostdecock)
 * docs: make navbar responsive on legacy 2.x docs #10171 [ad99526](https://github.com/ad99526)

5.12.6 / 2021-04-27
===================
 * fix(query): allow setting `writeConcern` schema option to work around MongoDB driver's `writeConcern` deprecation warning #10083 #10009 [IslandRhythms](https://github.com/IslandRhythms)
 * fix(populate): dedupe when virtual populate foreignField is an array to avoid duplicate docs in result #10117
 * fix(populate): add `localField` filter to `$elemMatch` on virtual populate when custom `match` has a `$elemMatch` and `foreignField` is an array #10117
 * fix(query): convert projection string values to numbers as a workaround for #10142
 * fix(document): set version key filter on `save()` when using `optimisticConcurrency` if no changes in document #10128 [IslandRhythms](https://github.com/IslandRhythms)
 * fix(model): use `obj` as `context` in `Model.validate()` if `obj` is a document #10132
 * fix(connection): avoid db events deprecation warning when using `useDb()` with `useUnifiedTopology` #8267
 * fix: upgrade to sift@13.5.2 to work around transitive dev dependency security warning #10121
 * fix(index.d.ts): allow any object as parameter to `create()` and `insertMany()` #10144
 * fix(index.d.ts): clarify that `eachAsync()` callback receives a single doc rather than array of docs unless `batchSize` is set #10135
 * fix(index.d.ts): clarify that return value from `validateSync()` is a ValidationError #10147 [michaln-q](https://github.com/michaln-q)
 * fix(index.d.ts): add generic type for Model constructor #10074 [Duchynko](https://github.com/Duchynko)
 * fix(index.d.ts): add parameter type in merge #10168 [yoonhoGo](https://github.com/yoonhoGo)

5.12.5 / 2021-04-19
===================
 * fix(populate): handle populating underneath document array when document array property doesn't exist in db #10003
 * fix(populate): clear out dangling pointers to populated docs so query cursor with populate() can garbage collect populated subdocs #9864
 * fix(connection): pull correct `autoCreate` value from Mongoose global when creating new model before calling `connect()` #10091
 * fix(populate): handle populating paths on documents with discriminator keys that point to non-existent discriminators #10082
 * fix(index.d.ts): allow numbers as discriminator names #10115
 * fix(index.d.ts): allow `type: Boolean` in Schema definitions #10085
 * fix(index.d.ts): allow passing array of aggregation pipeline stages to `updateOne()` and `updateMany()` #10095
 * fix(index.d.ts): support legacy 2nd param callback syntax for `deleteOne()`, `deleteMany()` #10122
 * docs(mongoose): make `useCreateIndex` always `false` in docs #10033
 * docs(schema): fix incorrect links from schema API docs #10111

5.12.4 / 2021-04-15
===================
 * fix: upgrade mongodb driver -> 3.6.6 #10079
 * fix: store fields set with select:false at schema-level when saving a new document #10101 [ptantiku](https://github.com/ptantiku)
 * fix(populate): avoid turning already populated field to null when populating an existing lean document #10068 [IslandRhythms](https://github.com/IslandRhythms)
 * fix(populate): correctly populate lean subdocs with `_id` property #10069
 * fix(model): insertedDocs may contain docs that weren't inserted #10098 [olnazx](https://github.com/olnazx)
 * fix(schemaType): make type Mixed cast error objects to pojos #10131 [AbdelrahmanHafez](https://github.com/AbdelrahmanHafez)
 * fix(populate): support populating embedded discriminators in nested arrays #9984
 * fix(populate): handle populating map paths using trailing `.$*` #10123
 * fix(populate): allow returning primitive from `transform()` function for single conventional populate #10064
 * fix(index.d.ts): allow generic classes of `T` to use `T & Document` internally #10046
 * fix(index.d.ts): allow `$pull` with `$` paths #10075
 * fix(index.d.ts): use correct `Date` type for `$currentDate` #10058
 * fix(index.d.ts): add missing asyncInterator to Query type def #10094 [borfig](https://github.com/borfig)
 * fix(index.d.ts): allow RHS of `$unset` properties to be any value #10066
 * fix(index.d.ts): allow setting SchemaType `index` property to a string #10077
 * refactor(index.d.ts): move discriminator() to common interface #10109 [LoneRifle](https://github.com/LoneRifle)

5.12.3 / 2021-03-31
===================
 * fix: avoid setting schema-level collation on text indexes #10044 [IslandRhythms](https://github.com/IslandRhythms)
 * fix(query): add `writeConcern()` method to avoid writeConcern deprecation warning #10009
 * fix(connection): use queueing instead of event emitter for `createCollection()` and other helpers to avoid event emitter warning #9778
 * fix(connection): scope `Connection#id` to Mongoose instance so id always lines up with `mongoose.connections` index #10025 [IslandRhythms](https://github.com/IslandRhythms)
 * fix: avoid throwing in `promiseOrCallback()` if 3rd param isn't an EventEmitter #10055 [emrebass](https://github.com/emrebass)
 * fix(index.d.ts): add Model as 2nd generic param to `Model.discriminator()` #10054 [coro101](https://github.com/coro101)
 * fix(index.d.ts): add docs to `next()` callback for `pre('insertMany')` hooks #10078 #10072 [pezzu](https://github.com/pezzu)
 * fix(index.d.ts): add `transform` to PopulateOptions interface #10061
 * fix(index.d.ts): add DocumentQuery type for backwards compatibility #10036

5.12.2 / 2021-03-22
===================
 * fix(QueryCursor): consistently execute `post('find')` hooks with an array of docs #10015 #9982 [IslandRhythms](https://github.com/IslandRhythms)
 * fix(schema): support setting `ref` as an option on an array SchemaType #10029
 * fix(query): apply schema-level `select` option from array schematypes #10029
 * fix(schema): avoid possible prototype pollution with `Schema()` constructor #10035 [zpbrent](https://github.com/zpbrent)
 * fix(model): make bulkWrite skip timestamps with timestamps: false #10050 [SoftwareSing](https://github.com/SoftwareSing)
 * fix(index.d.ts): make query methods return `QueryWithHelpers` so query helpers pass through chaining #10040
 * fix(index.d.ts): add `upserted` array to `updateOne()`, `updateMany()`, `update()` result #10042
 * fix(index.d.ts): add back `Aggregate#project()` types that were mistakenly removed in 5.12.0 #10043
 * fix(index.d.ts): always allow setting `type` in Schema to a SchemaType class or a Schema instance #10030
 * docs(transactions): introduce `session.withTransaction()` before `session.startTransaction()` because `withTransaction()` is the recommended approach #10008
 * docs(mongoose+browser): fix broken links to info about `mongoose.Types` #10016

5.12.1 / 2021-03-18
===================
 * fix: update mongodb -> 3.6.5 to fix circular dependency warning #9900
 * fix(document): make `toObject()` use child schema `flattenMaps` option by default #9995
 * fix(ObjectId): make `isValidObjectId()` check that length 24 strings are hex chars only #10010 #9996 [IslandRhythms](https://github.com/IslandRhythms)
 * fix(query): correctly cast embedded discriminator paths when discriminator key is specified in array filter #9977
 * fix(schema): skip `populated()` check when calling `applyGetters()` with a POJO for mongoose-lean-getters support #9986
 * fix(populate): support populating dotted subpath of a populated doc that has the same id as a populated doc #10005
 * fix(index.d.ts): correct `this` for query helpers #10028 [francescov1](https://github.com/francescov1)
 * fix(index.d.ts): avoid omitting function property keys in LeanDocuments, because TS can't accurately infer what's a function if using generic functions #9989
 * fix(index.d.ts): correct type definition for `SchemaType#cast()` #10039 #9980
 * fix(index.d.ts): make SchemaTypeOptions a class, add missing `SchemaType#OptionsConstructor` #10001
 * fix(index.d.ts): support calling `findByIdAndUpdate()` with filter, update, callback params #9981

5.12.0 / 2021-03-11
===================
 * feat(populate): add `transform` option that Mongoose will call on every populated doc #3775
 * feat(query): make `Query#pre()` and `Query#post()` public #9784
 * feat(document): add `Document#getPopulatedDocs()` to return an array of all populated documents in a document #9702 [IslandRhythms](https://github.com/IslandRhythms)
 * feat(document): add `Document#getAllSubdocs()` to return an array of all single nested and array subdocuments #9764 [IslandRhythms](https://github.com/IslandRhythms)
 * feat(schema): allow `schema` as a schema path name #8798 [IslandRhythms](https://github.com/IslandRhythms)
 * feat(QueryCursor): Add batch processing for eachAsync #9902 [khaledosama999](https://github.com/khaledosama999)
 * feat(connection): add `noListener` option to help with use cases where you're using `useDb()` on every request #9961
 * feat(index): emit 'createConnection' event when user calls `mongoose.createConnection()` #9985
 * feat(connection+index): emit 'model' and 'deleteModel' events on connections when creating and deleting models #9983
 * feat(query): allow passing `explain` option to `Model.exists()` #8098 [IslandRhythms](https://github.com/IslandRhythms)

5.11.20 / 2021-03-11
====================
 * fix(query+populate): avoid unnecessarily projecting in subpath when populating a path that uses an elemMatch projection #9973
 * fix(connection): avoid `db` events deprecation warning with 'close' events #10004 #9930
 * fix(index.d.ts): make `$pull` more permissive to allow dotted paths #9993

5.11.19 / 2021-03-05
====================
 * fix(document): skip validating array elements that aren't modified when `validateModifiedOnly` is set #9963
 * fix(timestamps): apply timestamps on `findOneAndReplace()` #9951
 * fix(schema): correctly handle trailing array filters when looking up schema paths #9977
 * fix(schema): load child class getter for virtuals instead of base class when using `loadClass()` #9975
 * fix(index.d.ts): allow creating statics without passing generics to `Schema` constructor #9969
 * fix(index.d.ts): add QueryHelpers generic to schema and model, make all query methods instead return QueryWithHelpers #9850
 * fix(index.d.ts): support setting `type` to an array of schemas when using SchemaDefinitionType #9962
 * fix(index.d.ts): add generic to plugin schema definition #9968 [emiljanitzek](https://github.com/emiljanitzek)
 * docs: small typo fix #9964 [KrishnaMoorthy12](https://github.com/KrishnaMoorthy12)

5.11.18 / 2021-02-23
====================
 * fix(connection): set connection state to `disconnected` if connecting string failed to parse #9921
 * fix(connection): remove `db` events deprecation warning if `useUnifiedTopology = true` #9930
 * fix(connection): fix promise chaining for openUri #9960 [lantw44](https://github.com/lantw44)
 * fix(index.d.ts): add `PopulatedDoc` type to make it easier to define populated docs in interfaces #9818
 * fix(index.d.ts): allow explicitly overwriting `toObject()` return type for backwards compatibility #9944
 * fix(index.d.ts): correctly throw error when interface path type doesn't line up with schema path type #9958 [ShadiestGoat](https://github.com/ShadiestGoat)
 * fix(index.d.ts): remove `any` from `deleteX()` and `updateX()` query params and return values #9959 [btd](https://github.com/btd)
 * fix(index.d.ts): add non-generic versions of `Model.create()` for better autocomplete #9928
 * docs: correctly handle multiple `&gt` in API descriptions #9940

5.11.17 / 2021-02-17
====================
 * fix(populate): handle `perDocumentLimit` when multiple documents reference the same populated doc #9906
 * fix(document): handle directly setting embedded document array element with projection #9909
 * fix(map): cast ObjectId to string inside of MongooseMap #9938 [HunterKohler](https://github.com/HunterKohler)
 * fix(model): use schema-level default collation for indexes if index doesn't have collation #9912
 * fix(index.d.ts): make `SchemaTypeOptions#type` optional again to allow alternative typeKeys #9927
 * fix(index.d.ts): support `{ type: String }` in schema definition when using SchemaDefinitionType generic #9911
 * docs(populate+schematypes): document the `$*` syntax for populating every entry in a map #9907
 * docs(connection): clarify that `Connection#transaction()` promise resolves to a command result #9919

5.11.16 / 2021-02-12
====================
 * fix(document): skip applying array element setters when init-ing an array #9889
 * fix: upgrade to mongodb driver 3.6.4 #9893 [jooeycheng](https://github.com/jooeycheng)
 * fix: avoid copying Object.prototype properties when cloning #9876
 * fix(aggregate): automatically convert functions to strings when using `$function` operator #9897
 * fix: call pre-remove hooks for subdocuments #9895 #9885 [IslandRhythms](https://github.com/IslandRhythms)
 * docs: fix confusing sentence in Schema docs #9914 [namenyi](https://github.com/namenyi)

5.11.15 / 2021-02-03
====================
 * fix(document): fix issues with `isSelected` as an path in a nested schema #9884 #9873 [IslandRhythms](https://github.com/IslandRhythms)
 * fix(index.d.ts): better support for `SchemaDefinition` generics when creating schema #9863 #9862 #9789
 * fix(index.d.ts): allow required function in array definition #9888 [Ugzuzg](https://github.com/Ugzuzg)
 * fix(index.d.ts): reorder create typings to allow array desctructuring #9890 [Ugzuzg](https://github.com/Ugzuzg)
 * fix(index.d.ts): add missing overload to Model.validate #9878 #9877 [jonamat](https://github.com/jonamat)
 * fix(index.d.ts): throw compiler error if schema says path is a String, but interface says path is a number #9857
 * fix(index.d.ts): make `Query` a class, allow calling `Query#where()` with object argument and with no arguments #9856
 * fix(index.d.ts): support calling `Schema#pre()` and `Schema#post()` with options and array of hooked function names #9844
 * docs(faq): mention other debug options than console #9887 [dandv](https://github.com/dandv)
 * docs(connections): clarify that Mongoose can emit 'error' both during initial connection and after initial connection #9853

5.11.14 / 2021-01-28
====================
 * fix(populate): avoid inferring `justOne` from parent when populating a POJO with a manually populated path #9833 [IslandRhythms](https://github.com/IslandRhythms)
 * fix(document): apply setters on each element of the array when setting a populated array #9838
 * fix(map): handle change tracking on maps of subdocs #9811 [IslandRhythms](https://github.com/IslandRhythms)
 * fix(document): remove dependency on `documentIsSelected` symbol #9841 [IslandRhythms](https://github.com/IslandRhythms)
 * fix(error): make ValidationError.toJSON to include the error name correctly #9849 [hanzki](https://github.com/hanzki)
 * fix(index.d.ts): indicate that `Document#remove()` returns a promise, not a query #9826
 * fix(index.d.ts): allow setting `SchemaType#enum` to TypeScript enum with `required: true` #9546

5.11.13 / 2021-01-20
====================
 * fix(map): handle change tracking on map of arrays #9813
 * fix(connection): allow passing options to `Connection#transaction()` #9834 [pnutmath](https://github.com/pnutmath)
 * fix(index.d.ts): make `Query#options#rawResult` take precedence over `new`+`upsert` #9816
 * fix(index.d.ts): changed setOptions's 'overwrite' argument to optional #9824 [pierissimo](https://github.com/pierissimo)
 * fix(index.d.ts): allow setting `mongoose.Promise` #9820
 * fix(index.d.ts): add `Aggregate#replaceRoot()` #9814
 * fix(index.d.ts): make `Model.create()` with a spread return a promise of array rather than single doc #9817
 * fix(index.d.ts): use SchemaDefinitionProperty generic for SchemaTypeOptions if specified #9815
 * docs(populate): add note about setting `toObject` for populate virtuals #9822

5.11.12 / 2021-01-14
====================
 * fix(document): handle using `db` as a document path #9798
 * fix(collection): make sure to call `onOpen()` if `autoCreate === false` #9807
 * fix(index.d.ts): correct query type for `findOneAndUpdate()` and `findByIdAndUpdate()` with `rawResult = true` #9803
 * fix(index.d.ts): require setting `new: true` or `returnOriginal: false` to skip null check with `findOneAndUpdate()` #9654
 * fix(index.d.ts): make methods and statics optional on schema #9801
 * fix(index.d.ts): remove non backwards compatible methods restriction #9801
 * docs: removed the extra word on comment doc #9794 [HenriqueLBorges](https://github.com/HenriqueLBorges)

5.11.11 / 2021-01-08
====================
 * fix(model): support calling `create()` with `undefined` as first argument and no callback #9765
 * fix(index.d.ts): ensure TypeScript knows that `this` refers to `DocType` in schema methods with strict mode #9755
 * fix(index.d.ts): make SchemaDefinition accept a model generic #9761 [mroohian](https://github.com/mroohian)
 * fix(index.d.ts): add `Aggregate#addFields()` #9774
 * fix(index.d.ts): allow setting `min` and `max` to [number, string] and [Date, string] #9762
 * fix(index.d.ts): improve context and type bindings for `Schema#methods` and `Schema#statics` #9717
 * docs: add recommended connection option #9768 [Fernando-Lozano](https://github.com/Fernando-Lozano)
 * chore: correct improper date in History.md #9783 [botv](https://github.com/botv)

5.11.10 / 2021-01-04
====================
 * fix(model): support `populate` option for `insertMany()` as a workaround for mongoose-autopopulate #9720
 * perf(schema): avoid creating extra array when initializing array of arrays #9588
 * perf(schema): avoid setting `arrayPath` when casting to a non-array, avoid unnecessarily setting atomics #9588
 * perf(schema): avoid expensive `String#slice()` call when creating a new array #9588
 * fix(queryhelpers): avoid modifying `lean.virtuals` in place #9754
 * fix: fall back to legacy treatment for square brackets if square brackets contents aren't a number #9640
 * fix(document): make fix for #9396 handle null values more gracefully #9709
 * fix(index.d.ts): add missing overloaded function for Document#populate() #9744 [sahasayan](https://github.com/sahasayan)
 * fix(index.d.ts): allow Model.create param1 overwrite #9753 [hasezoey](https://github.com/hasezoey)
 * fix(index.d.ts): improve autocomplete for query middleware #9752 [3Aahmednaser94](https://github.com/3Aahmednaser94)
 * fix(index.d.ts): add missing function for Aggregate#group() #9750 [coro101](https://github.com/coro101)
 * fix(index.d.ts): add missing `Aggregate#project()` #9763 [vorticalbox](https://github.com/vorticalbox)
 * fix(index.d.ts): allow `null` as an enum value for schematypes #9746
 * docs(guide+schema): make schema API docs and guide docs' list of Schema options line up #9749
 * docs(documents): add some more details about what the `save()` promise resolves to #9689
 * docs(subdocs): add section about subdocument defaults #7291
 * chore: run GitHub CI on PRs and update badge #9760 [YC](https://github.com/YC)

5.11.9 / 2020-12-28
===================
 * fix(document): keeps atomics when assigning array to filtered array #9651
 * fix(document): apply `defaults` option to subdocument arrays #9736
 * fix(index.d.ts): allow passing generic parameter to overwrite `lean()` result type #9728
 * fix(index.d.ts): add missing pre hook for findOneAndUpdate #9743 [sahasayan](https://github.com/sahasayan)
 * fix(index.d.ts): schema methods & statics types #9725
 * fix(index.d.ts): allow `id` paths with non-string values in TypeScript #9723
 * fix(index.d.ts): support calling `createIndexes()` and `ensureIndexes()` with just callback #9706
 * fix(index.d.ts): include `__v` in LeanDocuments #9687
 * fix(index.d.ts): add missing `Aggregate#append()` #9714
 * chore: add eslint typescript support and lint index.d.ts file #9729 [simllll](https://github.com/simllll)
 * chore: add Github Actions #9688 [YC](https://github.com/YC)

5.11.8 / 2020-12-14
===================
 * fix(index.d.ts): add missing single document populate #9696 [YC](https://github.com/YC)
 * fix(index.d.ts): make options optional for `toObject` #9700
 * fix(index.d.ts): added missing match and model methods in Aggregate class #9710 [manekshms](https://github.com/manekshms)
 * fix(index.d.ts): make options optional for `createIndexes()` and `ensureIndexes()` #9706
 * fix(index.d.ts): support passing a function to `ValidateOpts.message` #9697
 * docs: add media query for ::before on headings #9705 #9704 [YC](https://github.com/YC)

5.11.7 / 2020-12-10
===================
 * fix(document): ensure calling `get()` with empty string returns undefined for mongoose-plugin-autoinc #9681
 * fix(model): set `isNew` to false for documents that were successfully inserted by `insertMany` with `ordered = false` when an error occurred #9677
 * fix(index.d.ts): add missing Aggregate#skip() & Aggregate#limit() #9692 [sahasayan](https://github.com/sahasayan)
 * fix(index.d.ts): make `Document#id` optional so types that use `id` can use `Model<IMyType & Document>` #9684

5.11.6 / 2020-12-09
===================
 * fix(middleware): ensure sync errors in pre hooks always bubble up to the calling code #9659
 * fix(index.d.ts): allow passing ObjectId properties as strings to `create()` and `findOneAndReplace()` #9676
 * fix(index.d.ts): allow calling `mongoose.model()` and `Connection#model()` with model as generic param #9685 #9678 [sahasayan](https://github.com/sahasayan)
 * fix(index.d.ts): Fix return type of Model#aggregate() #9680 [orgads](https://github.com/orgads)
 * fix(index.d.ts): optional next() parameter for post middleware #9683 [isengartz](https://github.com/isengartz)
 * fix(index.d.ts): allow array of validators in SchemaTypeOptions #9686 [cjroebuck](https://github.com/cjroebuck)

5.11.5 / 2020-12-07
===================
 * fix(map): support `null` in maps of subdocs #9628
 * fix(index.d.ts): support object syntax for `validate` #9667
 * fix(index.d.ts): Allow number for Schema expires #9670 [alecgibson](https://github.com/alecgibson)
 * fix(index.d.ts): allow definining arbitrary properties on SchemaTypeOpts for plugins like mongoose-autopopulate #9669
 * fix(index.d.ts): add mongoose.models #9661 #9660 [AbdelrahmanHafez](https://github.com/AbdelrahmanHafez)
 * fix(index.d.ts): allow the next() argument to be optional #9665 #9664 [sahasayan](https://github.com/sahasayan)
 * fix(index.d.ts): add missing `VirtualType#applyGetters()` and `applySetters()`, `Schema#virtuals`, `Schema#childSchemas`, `Query#_mongooseOptions` #9658
 * fix(index.d.ts): add `id` to LeanDocuments in case it is defined in the user's schema #9657
 * fix(index.d.ts): add missing types for hook functions #9653
 * fix(index.d.ts): improve support for strict null checks with `upsert` and `orFail()` #9654
 * fix(index.d.ts): make return values for `insertMany()` more consistent #9662
 * fix(index.d.ts): Change options in Connection#collection() to be optional #9663 [orgads](https://github.com/orgads)
 * fix(index.d.ts): add the missing generic declaration for Schema #9655 [sahasayan](https://github.com/sahasayan)
 * fix(index.d.ts): add missing `SchemaTypeOpts` and `ConnectionOptions` aliases for backwards compat
 * docs(populate): remove `sort()` from `limit` example to avoid potential confusion #9584
 * docs(compatibility): add MongoDB server 4.4 version compatibility #9641

5.11.4 / 2020-12-04
===================
 * fix(index.d.ts): add `Document#__v` so documents have a Version by default #9652 [sahasayan](https://github.com/sahasayan)
 * fix(index.d.ts): add missing `session` option to `SaveOptions` #9642
 * fix(index.d.ts): add `Schema#paths`, `Schema#static(obj)`, `Embedded#schema`, `DocumentArray#schema`, make Schema inherit from EventEmitter #9650
 * fix(index.d.ts): order when cb is optional in method #9647 [CatsMiaow](https://github.com/CatsMiaow)
 * fix(index.d.ts): use DocumentDefinition for `FilterQuery` #9649
 * fix(index.d.ts): correct callback result types for `find()`, `findOne()`, `findById()` #9648
 * fix(index.d.ts): remove `Document#parent()` method because it conflicts with existing user code #9645
 * fix(index.d.ts): add missing `Connection#db` property #9643
 * test(typescript): add `tsconfig.json` file for intellisense #9611 [alecgibson](https://github.com/alecgibson)

5.11.3 / 2020-12-03
===================
 * fix(index.d.ts): make Mongoose collection inherit MongoDB collection #9637 #9630 [AbdelrahmanHafez](https://github.com/AbdelrahmanHafez)
 * fix(index.d.ts): add `Document#_id` so documents have an id by default #9632
 * fix(index.d.ts): allow inline schema definitions for nested properties #9639 [Green-Cat](https://github.com/Green-Cat)
 * fix(index.d.ts): add support for missing error message definitions #9638 [SaifAlsabe](https://github.com/SaifAlsabe)
 * fix(schema+discriminator): support defining recursive embedded discriminators by passing document array schematype to discriminator #9600
 * fix(index.d.ts): make it possible to use `LeanDocument` with arrays #9620
 * fix(index.d.ts): add `ModelUpdateOptions` as alias for `QueryOptions` for backwards compat #9637

5.11.2 / 2020-12-02
===================
 * fix(index.d.ts): add missing query options and model `findById()` function #9626 #9620
 * fix(index.d.ts): support defining schema paths as arrays of functions #9617
 * fix(index.d.ts): add automatic `_id` for Document, support creating Mongoose globals and accessing collection name #9618
 * fix(index.d.ts): add missing global `get()` and `set()` #9616
 * fix(index.d.ts): add missing `new` and `returnOriginal` options to QueryOptions, add missing model static properties #9627 #9616 #9615
 * fix(index.d.ts): allow `useCreateIndex` in connection options #9621

5.11.1 / 2020-12-01