[Answered ]-Django – How do I use the associated model of the modelForm in queryset to the form

by

0👍

✅

I found that “self.instance” works, which is exactly what I want: 

 self.fields['attribute'].queryset = self.instance.attribute.all()
👤kli

2👍

When you declare a Model with

class MyModel(models.Model):
    class Meta:
        something = 'foo'

or a ModelForm with

class MyModelForm(forms.ModelForm):
    class Meta:
        model = MyModel

there is a special metaclass that upon “reading” your class definition, among
other things, it sets/replaces the Meta attribute as _meta.

So in order to access the associated model in your ModelForm do:

AttributeIndexForm._meta.model

But in your particular situation where you just want to customize the queryset of
the attribute field you should do:

class AttributeIndexForm(forms.ModelForm):
    class Meta: 
        model = AttributeIndex  
    def __init__(self, *args, **kwargs):
        super(AttributeIndexForm, self).__init__(*args, **kwargs)
        self.fields['attribute'].queryset = Attribute.objects.filter(..condition..)
        self.fields['attribute'].widget = widgets.FilteredSelectMultiple("Attributes", is_stacked=False))
👤rantanplan

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