Django: access the parent instance from the Inline model admin

Question

How can I access the parent instance from the inline model admin?

My goal is to override the has_add_permission function based on the status of the pare

Answer 1

You only need to add obj parameter and check the parent model status

class ChildInline(admin.TabularInline):
   model = Child
   form = ChildForm

   fields = (
    ...
    )
   extra = 0
   #You only need to add obj parameter 
   #obj is parent object now you can easily check parent object status
   def has_add_permission(self, request, obj=None):
        if obj.status == 1:
           return True
        else:
           return False


   class ParentAdmin(admin.ModelAdmin):
         inlines = [ChildInline,]