Making inlines conditional in the Django admin

Question

I have a model that I want staff to be able to edit up to the date for the event. Like this:

class ThingAdmin(admin.ModelAdmin):
    model = Thing

    if obj.da         


        

Answer 1

I had a complex case where the solutions I tried failed in unexpected ways (problems with readonly fields in inlines). This is the most clear and failsafe way I've found:

class MyAdmin(admin.ModelAdmin):

    def add_view(self, request, form_url='', extra_context=None):
        self.inlines = [InlineA, InlineC]
        return super(MyAdmin, self).add_view(request, form_url, extra_context)

    def change_view(self, request, object_id, form_url='', extra_context=None):
        self.inlines = [InlineB, InlineC, InlineD]
        return super(MyAdmin, self).change_view(request, object_id, form_url, extra_context)

This is working in Django 1.4.x.