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Document the allowNull option for NotBlank constraint #10954

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Feb 1, 2019
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Document the allowNull option for NotBlank constraint #10954

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24 changes: 16 additions & 8 deletions reference/constraints/NotBlank.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -2,19 +2,15 @@ NotBlank
========

Validates that a value is not blank - meaning not equal to a blank string,
a blank array, ``null`` or ``false``::

if (false === $value || (empty($value) && '0' != $value)) {
// validation will fail
}

To force that a value is simply not equal to ``null``, see the
a blank array, ``false`` or ``null`` (null behavior is configurable). To check
that a value is not equal to ``null``, see the
:doc:`/reference/constraints/NotNull` constraint.

+----------------+------------------------------------------------------------------------+
| Applies to | :ref:`property or method <validation-property-target>` |
+----------------+------------------------------------------------------------------------+
| Options | - `message`_ |
| Options | - `allowNull`_ |
| | - `message`_ |
| | - `payload`_ |
+----------------+------------------------------------------------------------------------+
| Class | :class:`Symfony\\Component\\Validator\\Constraints\\NotBlank` |
Expand Down Expand Up @@ -87,6 +83,18 @@ class were not blank, you could do the following:
Options
-------

allowNull
~~~~~~~~~

**type**: ``bool`` **default**: ``false``

If set to ``true``, ``null`` values are considered valid and won't trigger a
constraint violation.

.. versionadded:: 4.3

The ``allowNull`` option was introduced in Symfony 4.3.

message
~~~~~~~

Expand Down