django raw_id_field javascript callback -

consider example:

models.py

class foo(models.model):     = models.foreignkey(something)   class bar(models.model):     foo = models.foreignkey(foo)     option = models.foreignkey(option) 

admin.py

class barinline(admin.tabularinline):     model = bar      raw_id_fields = ('option',)   class fooadmin(admin.modeladmin):     raw_id_fields = ('something',) 

so when create fresh foo object, no barinlines have been defined yet.

without saving foo object first limit barinline option field's options adding parameter (e.g. &option__id=<something>) javascript trigger. how hook javascript callback?

i cannot seem find documentation regarding raw_id_field javascript callbacks, seems unlikely there aren't hooks, missing?