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Commitc246ddc

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minor#10954 Document the allowNull option for NotBlank constraint (javiereguiluz)
This PR was merged into the master branch.Discussion----------Document the allowNull option for NotBlank constraintThis documentssymfony/symfony#29641Commits-------ab2c4f1 Document the allowNull option for NotBlank constraint
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‎reference/constraints/NotBlank.rst‎

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========
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Validates that a value is not blank - meaning not equal to a blank string,
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a blank array, ``null`` or ``false``::
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if (false === $value || (empty($value) && '0' != $value)) {
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// validation will fail
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}
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To force that a value is simply not equal to ``null``, see the
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a blank array, ``false`` or ``null`` (null behavior is configurable). To check
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that a value is not equal to ``null``, see the
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:doc:`/reference/constraints/NotNull` constraint.
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+----------------+------------------------------------------------------------------------+
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| Applies to|:ref:`property or method<validation-property-target>`|
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+----------------+------------------------------------------------------------------------+
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| Options| - `message`_|
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| Options| - `allowNull`_|
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|| - `message`_|
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|| - `payload`_|
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+----------------+------------------------------------------------------------------------+
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| Class|:class:`Symfony\\Component\\Validator\\Constraints\\NotBlank`|
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Options
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-------
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allowNull
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~~~~~~~~~
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**type**: ``bool`` **default**: ``false``
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If set to ``true``, ``null`` values are considered valid and won't trigger a
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constraint violation.
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..versionadded::4.3
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The ``allowNull`` option was introduced in Symfony 4.3.
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message
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~~~~~~~
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