Accessing parent model instance from modelform of admin inline

Question

I\'m using a TabularInline in Django\'s admin, configured to show one extra blank form.

class MyChildInline(admin.TabularInline):
    model = MyChildModel
           


        

Answer 1

I'm using Django 1.10 and it works for me:
Create a FormSet and put the parent object into kwargs:

class MyFormSet(BaseInlineFormSet):

    def get_form_kwargs(self, index):
        kwargs = super(MyFormSet, self).get_form_kwargs(index)
        kwargs.update({'parent': self.instance})
        return kwargs

Create a Form and pop an atribute before super called

class MyForm(forms.ModelForm):

    def __init__(self, *args, **kwargs):
        parent = kwargs.pop('parent')
        super(MyForm, self).__init__(*args, **kwargs)
        # do whatever you need to with parent

Put that in the inline admin:

class MyModelInline(admin.StackedInline):
    model = MyModel
    fields = ('my_fields', )
    form = MyFrom
    formset = MyFormSet