Single Select
=============
Description
-----------
Adds the possibility to choose a single value from a given list of values.
Parameters
----------
.. list-table::
:header-rows: 1
* - Parameter
- Type
- Description
* - values
- collection
- A collection of values to choose from.
* - default_value
- string
- The name of the param which should be set as default.
Example
-------
.. code-block:: xml
Single Select
Option 1
Option 2
Expression Example
------------------
By using a ``param`` with the type ``expression``, it is also possible to display
the values returned by a service (:doc:`../../cookbook/select-values-service`).
.. note::
Be aware that the provided expression is only evaluated during the initial request to the administration interface.
If you want to provide a selection for your custom entity, you should configure the ``single_selection`` field-type
as described in :doc:`../../book/extend-admin`.
.. code-block:: xml
Single Select
Twig
----
.. code-block:: twig