CODEWITHSUNDEEP
djangodjango-forms
cegthgtlhj
cegthgtlhj

Reputation: 311

Django ChoiceField. How to pass initial value to the form

Sorry, I am a beginner. How to pass the variable / value x = "ABCDE" to the form?

#views.py
     ...
     x = "ABCDE"
     form1 = KSS_Form1(initial={'x':x})
     context = {'form':form1, **context}
     return render(request, 'af/size/01_kss_size2.html', context)

#forms.py
class KSS_Form1(forms.Form):
    mat_geh_innen = forms.ChoiceField(choices=[], widget=forms.Select())
    def __init__(self, *args, **kwargs):
         super(KSS_Form1, self).__init__(*args, **kwargs)
         self.initial['mat_geh_innen'] = x
         self.fields['mat_geh_innen'].choices = \
            [(i.id, "Housing: " + i.mat_housing.descr) \
            for i in afc_select_housing_innenteile.objects.filter(Q(series__valuefg__exact=x) & Q(anw_01=True))]

as for now I get an error message Exception Value: name 'x' is not defined

How shall I pass 2, 3, or more values if I have a number of different ChoiceFields in the Form?

Thank you

Upvotes: 1

Views: 1890

Answers (2)

cegthgtlhj
cegthgtlhj

Reputation: 311

Willem Van Onsem, thank you for the hint. For me this was the solution.

class KSS_Form1(forms.Form):
    mat_geh_innen = forms.ChoiceField(choices=[], widget=forms.Select())
    
    def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
         x = self.initial['x']
         self.fields['mat_geh_innen'].choices = [
             (i.id, 'Housing: ' + i.mat_housing.descr)
             for i in 
             afc_select_housing_innenteile.objects.filter(series__valuefg=x, anw_01=True)
         ]

Upvotes: 1

willeM_ Van Onsem
willeM_ Van Onsem

Reputation: 477533

You can obtain this from the self.initial dictionary:

#forms.py

class KSS_Form1(forms.Form):
    mat_geh_innen = forms.ChoiceField(choices=[], widget=forms.Select())
    
    def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
         self.fields['mat_geh_innen'].initial = self.initial['x']
         self.fields['mat_geh_innen'].choices = [
             (i.id, 'Housing: ' + i.mat_housing.descr)
             for i in 
             afc_select_housing_innenteile.objects.filter(series__valuefg=x, anw_01=True)
         ]

You however might want to look to a ModelChoiceField [Django-doc] that makes it more convenient to select model objects.

Upvotes: 2

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