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Added caution block under delete_empty to warn the developer when he try to activate delete_empty for collections of compound forms #7767

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Merged
merged 5 commits into from
Jul 21, 2017
Merged

Added caution block under delete_empty to warn the developer when he try to activate delete_empty for collections of compound forms #7767

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b9e375c
Added caution block under delete_empty to warn the developer when he …
murilolobato Apr 7, 2017
ca04555
Improved format of message and added missing information.
murilolobato Apr 8, 2017
de25ede
Minor reword
javiereguiluz Apr 8, 2017
52c0a94
Minor fix
javiereguiluz Apr 8, 2017
ce30e47
Applied reviewer suggestion
murilolobato Apr 29, 2017
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9 changes: 9 additions & 0 deletions reference/forms/types/collection.rst
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Expand Up @@ -273,6 +273,15 @@ form you have to set this option to true. However, existing collection entries
will only be deleted if you have the allow_delete_ option enabled. Otherwise
the empty values will be kept.

.. caution::

The ``delete_empty`` option only removes items when the normalized value is
``null``. If the nested `type`_ is a compound form type, you must either set
the ``required`` option to ``false`` or set the ``empty_data`` option to
``null``. Both of these options can be set inside `options`_. See
:ref:`form's empty_data option <reference-form-option-empty-data>` to learn
why this is necessary.

options
~~~~~~~

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2 changes: 2 additions & 0 deletions reference/forms/types/form.rst
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Expand Up @@ -80,6 +80,8 @@ option on the form.

.. include:: /reference/forms/types/options/data_class.rst.inc

.. _reference-form-option-empty-data:

.. include:: /reference/forms/types/options/empty_data.rst.inc
:end-before: DEFAULT_PLACEHOLDER

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