admin: remove more duplicate code

passbook/admin/views/policy.py

@@ -14,7 +14,7 @@ from guardian.mixins import PermissionListMixin, PermissionRequiredMixin
 
 from passbook.admin.forms.policies import PolicyTestForm
 from passbook.core.models import Policy
-from passbook.lib.utils.reflection import path_to_class
+from passbook.lib.utils.reflection import all_subclasses, path_to_class
 from passbook.lib.views import CreateAssignPermView
 from passbook.policies.engine import PolicyEngine
 
@@ -30,7 +30,7 @@ class PolicyListView(LoginRequiredMixin, PermissionListMixin, ListView):
 
     def get_context_data(self, **kwargs):
         kwargs["types"] = {
-            x.__name__: x._meta.verbose_name for x in Policy.__subclasses__()
+            x.__name__: x._meta.verbose_name for x in all_subclasses(Policy)
         }
         return super().get_context_data(**kwargs)
 
@@ -62,7 +62,7 @@ class PolicyCreateView(
 
     def get_form_class(self):
         policy_type = self.request.GET.get("type")
-        model = next(x for x in Policy.__subclasses__() if x.__name__ == policy_type)
+        model = next(x for x in all_subclasses(Policy) if x.__name__ == policy_type)
         if not model:
             raise Http404
         return path_to_class(model.form)

passbook/admin/views/providers.py

@@ -12,7 +12,7 @@ from django.views.generic import DeleteView, ListView, UpdateView
 from guardian.mixins import PermissionListMixin, PermissionRequiredMixin
 
 from passbook.core.models import Provider
-from passbook.lib.utils.reflection import path_to_class
+from passbook.lib.utils.reflection import all_subclasses, path_to_class
 from passbook.lib.views import CreateAssignPermView
 
 
@@ -27,7 +27,7 @@ class ProviderListView(LoginRequiredMixin, PermissionListMixin, ListView):
 
     def get_context_data(self, **kwargs):
         kwargs["types"] = {
-            x.__name__: x._meta.verbose_name for x in Provider.__subclasses__()
+            x.__name__: x._meta.verbose_name for x in all_subclasses(Provider)
         }
         return super().get_context_data(**kwargs)
 
@@ -52,9 +52,7 @@ class ProviderCreateView(
 
     def get_form_class(self):
         provider_type = self.request.GET.get("type")
-        model = next(
-            x for x in Provider.__subclasses__() if x.__name__ == provider_type
-        )
+        model = next(x for x in all_subclasses(Provider) if x.__name__ == provider_type)
         if not model:
             raise Http404
         return path_to_class(model.form)

passbook/stages/invitation/api.py

@@ -34,9 +34,7 @@ class InvitationSerializer(ModelSerializer):
         fields = [
             "pk",
             "expires",
-            "fixed_username",
-            "fixed_email",
-            "needs_confirmation",
+            "fixed_data",
         ]
 
 

passbook/stages/password/api.py

@@ -15,7 +15,6 @@ class PasswordStageSerializer(ModelSerializer):
             "pk",
             "name",
             "backends",
-            "password_policies",
         ]