[1.0.X] Fixed #10845 -- Clarified the examples for using ModelForms with fields or exclude specified. Thanks to Andrew Durdin for the suggestion.

Merge of r10972 from trunk.


git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.0.X@10975 bcc190cf-cafb-0310-a4f2-bffc1f526a37
This commit is contained in:
Russell Keith-Magee 2009-06-10 12:54:15 +00:00
parent 383c46dc8d
commit 922aed5465
1 changed files with 13 additions and 10 deletions

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@ -318,16 +318,19 @@ Since the Author model has only 3 fields, 'name', 'title', and
to be empty, and does not provide a default value for the missing fields,
any attempt to ``save()`` a ``ModelForm`` with missing fields will fail.
To avoid this failure, you must instantiate your model with initial values
for the missing, but required fields, or use ``save(commit=False)`` and
manually set any extra required fields::
for the missing, but required fields::
instance = Instance(required_field='value')
form = InstanceForm(request.POST, instance=instance)
new_instance = form.save()
author = Author(title='Mr')
form = PartialAuthorForm(request.POST, instance=author)
form.save()
instance = form.save(commit=False)
instance.required_field = 'new value'
new_instance = instance.save()
Alternatively, you can use ``save(commit=False)`` and manually set
any extra required fields::
form = PartialAuthorForm(request.POST)
author = form.save(commit=False)
author.title = 'Mr'
author.save()
See the `section on saving forms`_ for more details on using
``save(commit=False)``.