Django admin widget override -

i've write class, 'mywidget', extend foreignkeyrawidwidget , override render method. (https://github.com/django/django/blob/master/django/contrib/admin/widgets.py line:130)

now use mywidget instead of foreignkeyrawidwidget fields in admin site.

currently i've tried create modelform lines

 class meta:    model = mymodel    widgets = {       myfield : mywidget    } 

and 1 so

 myfield = mywidget()     class meta:    model = mymodel 

but none works me, 2 errors:

[first form configuration]
exception value:

error when calling metaclass bases init() takes @ least 3 arguments (1 given)

exception location: /home/martin/envs/dmbcau/local/lib/python2.7/site-packages/django/forms/fields.py in init, line 90

[second form configuration]

exception value:
init() takes @ least 3 arguments (1 given) exception location: /home/martin/projects/dmbcau/storage/admin.py in mywidget, line 244

knows should make working?

widget source @catherine

mywidget = foreignkeylinkedrawidwidget
http://pastebin.com/1qug1vsz