Django admin inline - show only when changing object

Question

I have a UserProfile which has many required (not null but blank) fields and I'm trying not to show it when adding a user.

I tried multiple things, for example:

def get_formsets_with_inlines(self, request, obj=None):
    if not obj:
        return []
    return super().get_formsets_with_inlines(request, obj)

But after saving User, django raises error which says that fields from UserProfile can't be null.

Do you know how to make it work?

Answer 1

As of Django 3.0, there is a ModelAdmin.get_inlines() method, which you can override like this:

def get_inlines(self, request, obj=None):
    if obj:
        return [FirstInline, SecondInline]
    else:
        return []

See Django Documentation.