How to create a Category by custom field(uid)?

Question

cant change pk to uid, due to migration, so My try:

class MyCategoryAdminDetail(CategoryAdminDetail, CreateAPIView):
lookup_field = 'uid'

"put" and "head" work correctly, but "create" creates categories always at the root, how can I fix this? 5 hours trying to understand what exactly is responsible for this in the Oscar, but did not understand