================================
MongoDB\\Collection::deleteOne()
================================

.. default-domain:: mongodb

.. contents:: On this page
   :local:
   :backlinks: none
   :depth: 1
   :class: singlecol

Definition
----------

.. phpmethod:: MongoDB\\Collection::deleteOne()

   Deletes at most one document that matches the filter criteria. If multiple
   documents match the filter criteria, only the :term:`first <natural order>`
   matching document will be deleted.

   .. code-block:: php

      function deleteOne($filter, array $options = []): MongoDB\DeleteResult

   This method has the following parameters:

   .. include:: /includes/apiargs/MongoDBCollection-method-deleteOne-param.rst

   The ``$options`` parameter supports the following options:

   .. include:: /includes/apiargs/MongoDBCollection-method-deleteOne-option.rst

Return Values
-------------

A :phpclass:`MongoDB\\DeleteResult` object, which encapsulates a
:php:`MongoDB\\Driver\\WriteResult <class.mongodb-driver-writeresult>` object.

Errors/Exceptions
-----------------

.. include:: /includes/extracts/error-unsupportedexception.rst
.. include:: /includes/extracts/error-invalidargumentexception.rst
.. include:: /includes/extracts/error-driver-bulkwriteexception.rst
.. include:: /includes/extracts/error-driver-runtimeexception.rst

Behavior
--------

.. include:: /includes/extracts/note-bson-comparison.rst
.. include:: /includes/extracts/bulkwriteexception-result.rst

Example
-------

The following example deletes one document in the ``users`` collection that has
has ``"ny"`` as the value for the ``state`` field:

.. code-block:: php

   <?php

   $collection = (new MongoDB\Client)->test->users;
   $collection->drop();

   $collection->insertOne(['name' => 'Bob', 'state' => 'ny']);
   $collection->insertOne(['name' => 'Alice', 'state' => 'ny']);
   $deleteResult = $collection->deleteOne(['state' => 'ny']);

   printf("Deleted %d document(s)\n", $deleteResult->getDeletedCount());

The output would then resemble::

   Deleted 1 document(s)

See Also
--------

- :phpmethod:`MongoDB\\Collection::deleteMany()`
- :phpmethod:`MongoDB\\Collection::bulkWrite()`
- :doc:`/tutorial/crud`
- :manual:`delete </reference/command/delete>` command reference  in the MongoDB
  manual
