=========================
MongoDB\\Collection Class
=========================

.. default-domain:: mongodb

.. contents:: On this page
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   :class: singlecol

Definition
----------

.. phpclass:: MongoDB\\Collection

   Provides methods for common operations on collections and documents,
   including CRUD operations and index management.

   You can construct collections directly using the driver's
   :php:`MongoDB\\Driver\\Manager <class.mongodb-driver-manager>` class or
   select a collection from the library's :phpclass:`MongoDB\\Client` or
   :phpclass:`MongoDB\\Database` classes. A collection may also be cloned from
   an existing :phpclass:`MongoDB\\Collection` object via the
   :phpmethod:`withOptions() <MongoDB\\Collection::withOptions>` method.

   :phpclass:`MongoDB\\Collection` supports the :php:`readConcern
   <mongodb-driver-readconcern>`, :php:`readPreference
   <mongodb-driver-readpreference>`, :php:`typeMap
   <manual/en/mongodb.persistence.deserialization.php#mongodb.persistence.typemaps>`,
   and :php:`writeConcern <mongodb-driver-writeconcern>` options. If you omit an
   option, the collection inherits the value from the :php:`Manager
   <mongodb-driver-manager>` constructor argument or the :phpclass:`Client
   <MongoDB\\Client>` or :phpclass:`Database <MongoDB\\Database>` object used to
   select the collection.

   Operations within the :phpclass:`MongoDB\\Collection` class inherit the
   collection's options.

Type Map Limitations
--------------------

   The :manual:`aggregate </reference/command/aggregate>` (when not using a
   cursor), :manual:`distinct </reference/command/distinct>`, and
   :manual:`findAndModify </reference/command/findAndModify>` helpers do not
   support a ``typeMap`` option due to a driver limitation. The
   :phpmethod:`aggregate() <MongoDB\\Collection::aggregate>`,
   :phpmethod:`distinct() <MongoDB\\Collection::distinct>`,
   :phpmethod:`findOneAndReplace() <MongoDB\\Collection::findOneAndReplace>`,
   :phpmethod:`findOneAndUpdate() <MongoDB\\Collection::findOneAndUpdate>`, and
   :phpmethod:`findOneAndDelete() <MongoDB\\Collection::findOneAndDelete>`
   methods return BSON documents as `stdClass` objects and BSON arrays as
   arrays.

Methods
-------

.. toctree::
   :titlesonly:

   /reference/method/MongoDBCollection__construct
   /reference/method/MongoDBCollection-aggregate
   /reference/method/MongoDBCollection-bulkWrite
   /reference/method/MongoDBCollection-count
   /reference/method/MongoDBCollection-countDocuments
   /reference/method/MongoDBCollection-createIndex
   /reference/method/MongoDBCollection-createIndexes
   /reference/method/MongoDBCollection-deleteMany
   /reference/method/MongoDBCollection-deleteOne
   /reference/method/MongoDBCollection-distinct
   /reference/method/MongoDBCollection-drop
   /reference/method/MongoDBCollection-dropIndex
   /reference/method/MongoDBCollection-dropIndexes
   /reference/method/MongoDBCollection-estimatedDocumentCount
   /reference/method/MongoDBCollection-explain
   /reference/method/MongoDBCollection-find
   /reference/method/MongoDBCollection-findOne
   /reference/method/MongoDBCollection-findOneAndDelete
   /reference/method/MongoDBCollection-findOneAndReplace
   /reference/method/MongoDBCollection-findOneAndUpdate
   /reference/method/MongoDBCollection-getCollectionName
   /reference/method/MongoDBCollection-getDatabaseName
   /reference/method/MongoDBCollection-getManager
   /reference/method/MongoDBCollection-getNamespace
   /reference/method/MongoDBCollection-getReadConcern
   /reference/method/MongoDBCollection-getReadPreference
   /reference/method/MongoDBCollection-getTypeMap
   /reference/method/MongoDBCollection-getWriteConcern
   /reference/method/MongoDBCollection-insertMany
   /reference/method/MongoDBCollection-insertOne
   /reference/method/MongoDBCollection-listIndexes
   /reference/method/MongoDBCollection-mapReduce
   /reference/method/MongoDBCollection-replaceOne
   /reference/method/MongoDBCollection-updateMany
   /reference/method/MongoDBCollection-updateOne
   /reference/method/MongoDBCollection-watch
   /reference/method/MongoDBCollection-withOptions