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=====================================
MongoDB\\Model\\IndexInfo::isUnique()
=====================================
.. default-domain:: mongodb
.. contents:: On this page
:local:
:backlinks: none
:depth: 1
:class: singlecol
Definition
----------
.. phpmethod:: MongoDB\\Model\\IndexInfo::isUnique()
Return whether the index is a :manual:`unique index </core/index-unique>`.
This correlates with the ``unique`` option for
:phpmethod:`MongoDB\\Collection::createIndex()`.
.. code-block:: php
function isUnique(): boolean
Return Values
-------------
A boolean indicating whether the index is a unique index.
Examples
--------
.. code-block:: php
<?php
$info = new IndexInfo([
'unique' => true,
]);
var_dump($info->isUnique());
The output would then resemble::
bool(true)
See Also
--------
- :phpmethod:`MongoDB\\Collection::createIndex()`
- :manual:`listIndexes </reference/command/listIndexes>` command reference in
the MongoDB manual
- :manual:`Unique Indexes </core/index-unique>` in the MongoDB manual