Python 从api请求获取模型对象

我有一个从许多模块调用的api_视图

url(r'^[0-9a-z\-]+/(?P<pk>[0-9a-z\-]+)/activate_entity/$', activate_entity)


@api_view(['POST', 'GET'])
def activate_entity(request, pk, *args, **kwargs):

api/v1/invoice/8f9ef9aa-94ac-412d-ba9d-343a70b55a96/activate_entity/
api/v1/finance/1234f9aa-94ac-412d-ba9d-343a70b55a96/activate_entity/

url(r'^(?P<entity>[0-9a-z\-]+)/(?P<pk>[0-9a-z\-]+)/activate_entity/$', activate_entity)

url(r'^(?P<entity>(invoice|finance|...))/(?P<pk>[0-9a-z\-]+)/activate_entity/$', activate_entity)

path('<slug:entity>/<uuid:pk>/activate_entity/', activate_entity)

def activate_entity(request, entity, pk, *args, **kwargs):
    from django.apps import apps
    m = apps.get_model(app_label='my_app', model_name=entity)
    obj = m.objects.get(pk=pk)
    ...