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#7311 choice_value callback argument can be null #7775

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#7311 choice_value callback argument can be null #7775

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7c3761f
#7311 choice_value callback argument can be null
Apr 8, 2017
c7ad1bc
Use backticks
Apr 13, 2017
eba3486
Fixed a syntax issue
javiereguiluz Apr 14, 2017
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3 changes: 3 additions & 0 deletions reference/forms/types/options/choice_value.rst.inc
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Expand Up @@ -11,6 +11,9 @@ configure the value that will be sent in the API request).
This can be a callable or a property path. See `choice_label`_ for similar usage.
If ``null`` is used, an incrementing integer is used as the name.

If you are using a callable to populate choice_value, you need to check for the
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choice_value should also be enclosed with double backticks

case that the value of the field may be null.
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null should be enclosed with two backticks like this:

[...] field may be ``null``.


.. caution::

In Symfony 2.7, there was a small backwards-compatibility break with how the
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