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[Validator] Mention exactly option for Length constraint #17764

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[Validator] Mention exactly option for Length constraint #17764

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19 changes: 19 additions & 0 deletions reference/constraints/Length.rst
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Expand Up @@ -163,6 +163,25 @@ Parameter Description
``{{ value }}`` The current (invalid) value
================= ============================================================

exactly
~~~~~~~

**type**: ``integer``

This option is the exact length value. Validation will fail if
the given value's length is not **exactly** equal to this value.

.. note::

This option is the one being set by default when using the Length constraint
without passing any named argument to it. This means that for example,
``@Assert\Length(20)`` and ``@Assert\Length(exactly=20)`` are equivalent, as
Comment on lines +177 to +178
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We can remove the annotation part in a follow up PR against 6.0

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I'll take care of this after the merge 👌

well as ``#[Assert\Length(20)]`` and ``#[Assert\Length(exactly: 20)]``.

.. versionadded:: 5.2

The named argument ``exactly`` was introduced in Symfony 5.2.

exactMessage
~~~~~~~~~~~~

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