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Fixed #8861 -- Added note on the availability of ModelForm.instance. Thanks to Ramiro Morales for the patch. 

git-svn-id: http://code.djangoproject.com/svn/django/trunk@11097 bcc190cf-cafb-0310-a4f2-bffc1f526a37
This commit is contained in:
Russell Keith-Magee 2009-06-24 14:04:18 +00:00
parent 78eb620c63
commit 970be97530
2 changed files with 19 additions and 7 deletions
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6
docs/ref/contrib/admin/index.txt
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@ -870,7 +870,7 @@ Adding custom validation to the admin
------------------------------------- -------------------------------------
Adding custom validation of data in the admin is quite easy. The automatic admin Adding custom validation of data in the admin is quite easy. The automatic admin
interfaces reuses :mod:`django.forms`, and the ``ModelAdmin`` class gives you interface reuses :mod:`django.forms`, and the ``ModelAdmin`` class gives you
the ability define your own form:: the ability define your own form::
class ArticleAdmin(admin.ModelAdmin): class ArticleAdmin(admin.ModelAdmin):
@ -890,7 +890,9 @@ any field::
It is important you use a ``ModelForm`` here otherwise things can break. See the It is important you use a ``ModelForm`` here otherwise things can break. See the
:ref:`forms <ref-forms-index>` documentation on :ref:`custom validation :ref:`forms <ref-forms-index>` documentation on :ref:`custom validation
<ref-forms-validation>` for more information. <ref-forms-validation>` and, more specifically, the
:ref:`model form validation notes <overriding-modelform-clean-method>` for more
information.
.. _admin-inlines: .. _admin-inlines:

20
docs/topics/forms/modelforms.txt
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@ -397,16 +397,26 @@ to be rendered first, we could specify the following ``ModelForm``::
... model = Book ... model = Book
... fields = ['title', 'author'] ... fields = ['title', 'author']
.. _overriding-modelform-clean-method:
Overriding the clean() method Overriding the clean() method
----------------------------- -----------------------------
You can override the ``clean()`` method on a model form to provide additional You can override the ``clean()`` method on a model form to provide additional
validation in the same way you can on a normal form. However, by default the validation in the same way you can on a normal form.
``clean()`` method validates the uniqueness of fields that are marked as
``unique``, ``unique_together`` or ``unique_for_date|month|year`` on the model. In this regard, model forms have two specific characteristics when compared to
Therefore, if you would like to override the ``clean()`` method and maintain the forms:
default validation, you must call the parent class's ``clean()`` method.
By default the ``clean()`` method validates the uniqueness of fields that are
marked as ``unique``, ``unique_together`` or ``unique_for_date|month|year`` on
the model. Therefore, if you would like to override the ``clean()`` method and
maintain the default validation, you must call the parent class's ``clean()``
method.
Also, a model form instance bound to a model object will contain a
``self.instance`` attribute that gives model form methods access to that
specific model instance.
Form inheritance Form inheritance
---------------- ----------------