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Added docs for castToArray() helper #7580

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Mar 7, 2017
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Added docs for castToArray() helper #7580

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15 changes: 13 additions & 2 deletions components/config/definition.rst
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Expand Up @@ -190,6 +190,18 @@ inside the current node. According to the prototype definition in the example
above, it is possible to have multiple connection arrays (containing a ``driver``,
``host``, etc.).

.. versionadded:: 3.3
The ``castToArray()`` helper was added in Symfony 3.3.

Sometimes, to improve the user experience of your application or bundle, you may
allow to use a simple string or numeric value where an array value is required.
Use the ``castToArray()`` helper to turn those variables into arrays::

->arrayNode('hosts')
->beforeNormalization()->castToArray()->end()
// ...
->end()

Array Node Options
~~~~~~~~~~~~~~~~~~

Expand Down Expand Up @@ -750,8 +762,7 @@ A validation rule also requires a "then" part:
- ``thenUnset()``

Usually, "then" is a closure. Its return value will be used as a new value
for the node, instead
of the node's original value.
for the node, instead of the node's original value.

Processing Configuration Values
-------------------------------
Expand Down