Re: Django session + dynamic form + model form
Thank you, Tom. You are right! I shouldn't assign choices to a
ModelMultipleChoiceField. That's what caused the problem. But instead of
constructing a custom ModelMultipleChoiceField subclass, I abandoned "Model
Form" and simply did the following, which worked!
class myForm(forms.Form):
Question = forms.ChoiceField(choices=[], widget=forms.RadioSelect())
def __init__(self, request, *args, **kwargs):
super(myForm, self).__init__(*args, **kwargs)
self.fields['Question'].choices =
Model.objects.filter(**request.session['filter_dict']).values_list('city',
'city').distinct()
And in views.py,
def myAnswer(request):
Answer = myForm(request, request.GET or None)
if Answer.is_valid():
...
...
Once again, thank you for pointing out such important concept. It helped a
lot!
cheers,
voss
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Re: Django session + dynamic form + model form
On Wed, Aug 3, 2011 at 4:57 AM, sasa1...@gmail.com wrote: > Thank you, DR. But I tried that before and it did not work for some reason. > It basically skips "if Answer.is_valid():" and goes to "else". > > voss > I think this is because you are abusing your model form, and hence it is not valid. You should not be setting choices on a ModelMultipleChoiceField, you should be supplying a queryset that describes the choices you want. When validating the form, django will check that the submitted values are contained in the ModelMultipleChoiceField's queryset. Furthermore, ModelMultipleChoiceField will normally have id -> description mapping, where as you have description -> description, eg it should generate this HTML - London, where as you have it generating London. It's just wrong. I guess you are trying to do this to control the label generated - you should be doing this[1]. So recap: Don't assign choices to a ModelMultipleChoiceField, assign a queryset Use a custom ModelMultipleChoiceField subclass to control how each model is displayed. Cheers Tom [1] https://docs.djangoproject.com/en/1.3/ref/forms/fields/#modelchoicefield I can't link to the block of text directly, look for this: """ The __unicode__ method of the model will be called to generate string representations of the objects for use in the field's choices; to provide customized representations, subclass ModelChoiceField and override label_from_instance. This method will receive a model object, and should return a string suitable for representing it. """ -- You received this message because you are subscribed to the Google Groups "Django users" group. To post to this group, send email to django-users@googlegroups.com. To unsubscribe from this group, send email to django-users+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/django-users?hl=en.
Re: Django session + dynamic form + model form
Thank you, DR. But I tried that before and it did not work for some reason. It basically skips "if Answer.is_valid():" and goes to "else". voss You've defined your form to expect a `request` argument, but then you haven't passed that argument. answer = MyForm(request, request.GET or None) -- DR. -- You received this message because you are subscribed to the Google Groups "Django users" group. To view this discussion on the web visit https://groups.google.com/d/msg/django-users/-/3eYgahTEsy8J. To post to this group, send email to django-users@googlegroups.com. To unsubscribe from this group, send email to django-users+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/django-users?hl=en. -- You received this message because you are subscribed to the Google Groups "Django users" group. To post to this group, send email to django-users@googlegroups.com. To unsubscribe from this group, send email to django-users+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/django-users?hl=en.
Re: Django session + dynamic form + model form
On Tuesday, 2 August 2011 19:15:12 UTC+1, voss wrote:
>
> Hello all,
>
> I have a dynamic form as follows:
>
> class myForm(forms.Form):
> Question =
> forms.ModelMultipleChoiceField(queryset=Model.objects.none(),
> widget=forms.RadioSelect())
> def __init__(self, request, *args, **kwargs):
> super(myForm, self).__init__(*args, **kwargs)
> self.fields['Question'].choices =
> Model.objects.filter(**request.session['filter_dict']).values_list('city',
> 'city').distinct()
>
>
> In views.py I have
>
> def myAnswer(request):
> Answer = myForm(request.GET or None)
> if Answer.is_valid():
> ...
> ...
>
> I am getting the "'QueryDict' object has no attribute 'session'" error, and
> I believe it is because of the "Ans = myForm(request.GET or None)" line.
> Could anyone please let me know how to fix it ?
>
> Many thanks!
>
>
You've defined your form to expect a `request` argument, but then you
haven't passed that argument.
answer = MyForm(request, request.GET or None)
--
DR.
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Django session + dynamic form + model form
Hello all,
I have a dynamic form as follows:
class myForm(forms.Form):
Question = forms.ModelMultipleChoiceField(queryset=Model.objects.none(),
widget=forms.RadioSelect())
def __init__(self, request, *args, **kwargs):
super(myForm, self).__init__(*args, **kwargs)
self.fields['Question'].choices =
Model.objects.filter(**request.session['filter_dict']).values_list('city',
'city').distinct()
In views.py I have
def myAnswer(request):
Answer = myForm(request.GET or None)
if Answer.is_valid():
...
...
I am getting the "'QueryDict' object has no attribute 'session'" error, and
I believe it is because of the "Ans = myForm(request.GET or None)" line.
Could anyone please let me know how to fix it ?
Many thanks!
--
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