Django - ForeignKey field initial value definition in Admin

django, django-admin, django-forms, django-modeladmin, django-models

Solution

My solution:

class PersonAdmin(admin.ModelAdmin):
    form = PersonAdminForm
    # ...
    def get_form(self, request, obj=None, *args, **kwargs):
        form = super(PersonAdmin, self).get_form(request, *args, **kwargs)
        # Initial values
        form.base_fields['mother'].initial = None
        if obj and obj.mother:
            form.base_fields['mother'].initial = obj.mother
        return form

Problem

I have a `Person` model, which has a `ForeignKey` field to itself, called `mother`. When the user goes to the 'add' admin form, I want to define an initial value for `mother`, in case there is a `GET('mother')` parameter, or leave it blank, in case there is not. I have actually 2 questions: - How to access request inside `ModelAdmin`? - How to define initial value for a `ForeignKey` field? In models.py: ``` class Person(models.Model): name=models.CharField() mother=models.ForeignKey('self') ``` In admin.py: ``` class PersonAdminForm(forms.ModelForm): class Meta: model = Person class PersonAdmin(admin.ModelAdmin): mother = request.GET.get('mother','') #don`t know how to access request if mother != '': form = PersonAdminForm form.initial={'mother':Person.objects.get(id=mother)} ``` Well, this ain't working. Even if I only try to define a hardcoded initial value, it doesn`t work. What am I doing wrong? PS.: Of course, I may be asking the wrong questions, so I appreciate any help that solves the problem.

Original source