Django - modelform inheritance

Question

On the Django website this sample code is given:

>>> class RestrictedArticleForm(EnhancedArticleForm):
...     class Meta(ArticleForm.Meta):
...         exclude = ('body',)

My understanding of this is that there's a modelform called EnhancedArticleForm (or ArticleForm and EnhancedArticleForm) and that this should exclude the body field from the form when it's rendered. My code looks like this:

class EditUserForm(UserForm):
    class Meta(UserForm.Meta):
        exclude = ('username',)

I don't want the user to be able to change their username obviously. But with this code in place, all it does is make the username field the last field to be displayed. It doesn't actually exclude it. Am I missing something obvious?

Edit:

Apparently this is because of a bug in django. I'm trying to overwrite init like so but the form doesn't show up. I think it's because I maybe did this wrong:

class EditUserForm(UserForm):
    def __init__(self,instance):
        UserForm.__init__(self,instance)
        del self.fields['username']

Bartek · Accepted Answer · 2011-01-24 23:36:15Z

1

This is actually a bug in Django:

http://code.djangoproject.com/ticket/8620 (See the comment in the ticket further down for your situation)

Unfortunately, it looks like it hasn't seen any action in over a year.

One way around this is to override the forms __init__ method and simply remove that field from self.fields.

answered Jan 24, 2011 at 23:36

Bartek

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5 Comments

Yuji 'Tomita' Tomita Over a year ago

Interesting stuff. JPC did you override username in your UserForm?

JPC Over a year ago

Yes because I needed to change some of its behavior

JPC Over a year ago

I tried to override the forms init method but now the form won't even show up. I edited my code to show this

JPC Over a year ago

What's the default value for a modelform when you don't pass request.POST

JPC Over a year ago

...so that it doesn't try to always validate my form

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