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[1.4.x] Fixed #14885 - Clarified that ModelForm cleaning may not fully complete if the form is invalid.

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Thanks Ben Sturmfels for the patch.

Backport of 3fd89d9903 from master.
This commit is contained in:
Tim Graham 2012-08-21 17:32:53 -04:00
parent b05d2f51b8
commit 42aee6ffe5
1 changed files with 7 additions and 4 deletions
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11
docs/topics/forms/modelforms.txt
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@ -200,10 +200,13 @@ The ``is_valid()`` method and ``errors``
---------------------------------------- ----------------------------------------
The first time you call ``is_valid()`` or access the ``errors`` attribute of a The first time you call ``is_valid()`` or access the ``errors`` attribute of a
``ModelForm`` triggers form validation as well as :ref:`model validation ``ModelForm`` triggers :ref:`form validation <form-and-field-validation>` as
<validating-objects>`. This has the side-effect of cleaning the model you pass well as :ref:`model validation <validating-objects>`. This has the side-effect
to the ``ModelForm`` constructor. For instance, calling ``is_valid()`` on your of cleaning the model you pass to the ``ModelForm`` constructor. For instance,
form will convert any date fields on your model to actual date objects. calling ``is_valid()`` on your form will convert any date fields on your model
to actual date objects. If form validation fails, only some of the updates
may be applied. For this reason, you'll probably want to avoid reusing the
model instance.
The ``save()`` method The ``save()`` method