Re: I am unable to get the choice field to validate on creating users. it doesn't make sense at all.

Hi Tom,

I have not understood what you have said. Shouldn't choice_desig be called every time I instantiate it in the view with the form = New_user_form(). I thought I was creating an object of New_user_form every time I do that.

Regards,

Preetam

On Wednesday, 19 March 2014 22:11:52 UTC+5:30, sashank reddy wrote:

Hi Tom,

What do you mean callable?

I tried changing

desig_group = forms.ChoiceField(choices=choice_desig()) 

to

desig_group = forms.ChoiceField(choices=choice_desig)

It gave error 'function' object is not iterable. 

But I want to know if the following would work.

desig = forms.ModelChoiceField(queryset=Group.objects.all())

But how do I change my view and template for it.

Can you please correct my view and template.

Regards,

Preetam

On Wednesday, 19 March 2014 21:43:39 UTC+5:30, Tom Evans wrote:

On Wed, Mar 19, 2014 at 3:40 PM, sashank reddy
<preetamsa...@gmail.com> wrote:
> Hi,
>
> I have been trying to extend the UserCreationForm and have a form which
> performs user registration and adds email and the names.
> In addition I am using a choice field that allows a list down of existing
> groups so that you can assign the user to an group immediately  upon
> creation.
>
> The problem is that, if I create a new group, and try to add users to it,
> then the form validation fails.
> I have restart the django server or wait for it to reset internally and show
> "Validating models ..". Then it starts to work.
>
> The following is the code snippet:
> =============================================================================
> def choice_desig():
> choice_desig = []
> g = Group.objects.all()
> for k in g:
> choice_desig.append((k.name, k.name))
> return choice_desig
>
> class New_user_form(UserCreationForm):
> email = forms.EmailField(required=True)
> first_name = forms.CharField(required=True)
> last_name = forms.CharField(required=True)
> desig_group = forms.ChoiceField(choices=choice_desig())

If you use choice_desig() function like that, it will get called once,
when the server initially parses that file. It will never be run again
until the server re-parses that file.

You could pass a callable to choices - "choices=choice_desig".

However, the right solution for when you want a form field to choose a
model instance is to use a form.ModelChoiceField.

Cheers

Tom

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