Django filter many to many field in admin?

Question

I have three objects:

Thing
  some fields

Bucket
  things = models.ManyToManyField(Thing)

User
  buckets = models.ManyToManyField(Bucket)
  things = models         


        

Answer 1

Read the docs:

class BucketAdmin(admin.ModelAdmin):
    def formfield_for_foreignkey(self, db_field, request, **kwargs):
        if db_field.name == "things":
             kwargs["queryset"] = Things.objects.filter(...)
        return super(BucketAdmin, self).formfield_for_foreignkey(db_field, request, **kwargs)