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==================================
MongoDB\\GridFS\\Bucket::findOne()
==================================
.. default-domain:: mongodb
.. contents:: On this page
:local:
:backlinks: none
:depth: 1
:class: singlecol
Definition
----------
.. phpmethod:: MongoDB\\GridFS\\Bucket::findOne()
Finds a single document from the GridFS bucket's files collection matching
the query.
.. code-block:: php
function findOne($filter = [], array $options = []): array|object|null
This method has the following parameters:
.. include:: /includes/apiargs/MongoDBCollection-method-findOne-param.rst
The ``$options`` parameter supports the following options:
.. include:: /includes/apiargs/MongoDBGridFSBucket-method-findOne-option.rst
Return Values
-------------
An array or object for the :term:`first document <natural order>` that matched
the query, or ``null`` if no document matched the query. The return type will
depend on the ``typeMap`` option.
Errors/Exceptions
-----------------
.. include:: /includes/extracts/error-unsupportedexception.rst
.. include:: /includes/extracts/error-invalidargumentexception.rst
.. include:: /includes/extracts/error-driver-runtimeexception.rst
Behavior
--------
.. include:: /includes/extracts/note-bson-comparison.rst
Examples
--------
.. code-block:: php
<?php
$bucket = (new MongoDB\Client)->test->selectGridFSBucket();
$stream = fopen('php://temp', 'w+b');
fwrite($stream, "foobar");
rewind($stream);
$bucket->uploadFromStream('b', $stream);
$fileDocument = $bucket->findOne(
['length' => ['$lte' => 6]],
[
'projection' => [
'filename' => 1,
'length' => 1,
'_id' => 0,
],
'sort' => ['length' => -1],
]
);
var_dump($fileDocument);
The output would then resemble::
object(MongoDB\Model\BSONDocument)#3004 (1) {
["storage":"ArrayObject":private]=>
array(2) {
["filename"]=>
string(1) "b"
["length"]=>
int(6)
}
}
See Also
--------
- :phpmethod:`MongoDB\\Collection::findOne()`
- :phpmethod:`MongoDB\\GridFS\\Bucket::find()`