Views: clean up how we use serializers and remove integrity_errors catch-alls.

The integrity errors were a bad relic from the EteSync sources and needed
to be removed.

django_etebase/views.py

@@ -197,17 +197,11 @@ class CollectionViewSet(BaseViewSet):
 
     def create(self, request, *args, **kwargs):
         serializer = self.get_serializer(data=request.data)
-        if serializer.is_valid():
-            try:
+        serializer.is_valid(raise_exception=True)
         serializer.save(owner=self.request.user)
-            except IntegrityError:
-                content = {'code': 'integrity_error'}
-                return Response(content, status=status.HTTP_400_BAD_REQUEST)
 
         return Response({}, status=status.HTTP_201_CREATED)
 
-        return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
-
     def list(self, request):
         queryset = self.get_queryset()
         result, new_stoken, done = self.filter_by_stoken_and_limit(request, queryset)
@@ -326,7 +320,7 @@ class CollectionItemViewSet(BaseViewSet):
         queryset = self.get_queryset()
 
         serializer = CollectionItemBulkGetSerializer(data=request.data, many=True)
-        if serializer.is_valid():
+        serializer.is_valid(raise_exception=True)
         # FIXME: make configurable?
         item_limit = 200
 
@@ -354,8 +348,6 @@ class CollectionItemViewSet(BaseViewSet):
         }
         return Response(ret)
 
-        return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
-
     @action_decorator(detail=False, methods=['POST'])
     def batch(self, request, collection_uid=None):
         return self.transaction(request, collection_uid, validate_etag=False)
@@ -383,12 +375,7 @@ class CollectionItemViewSet(BaseViewSet):
             ser_valid = serializer.is_valid()
             deps_ser_valid = (deps is None or deps_serializer.is_valid())
             if ser_valid and deps_ser_valid:
-                try:
                 items = serializer.save(collection=collection_object)
-                except IntegrityError:
-                    # FIXME: return the items with a bad token (including deps) so we don't have to fetch them after
-                    content = {'code': 'integrity_error'}
-                    return Response(content, status=status.HTTP_400_BAD_REQUEST)
 
                 ret = {
                 }
@@ -423,17 +410,11 @@ class CollectionItemChunkViewSet(viewsets.ViewSet):
         col_it = get_object_or_404(col.items, uid=collection_item_uid)
 
         serializer = self.get_serializer_class()(data=request.data)
-        if serializer.is_valid():
-            try:
+        serializer.is_valid(raise_exception=True)
         serializer.save(item=col_it)
-            except IntegrityError:
-                content = {'code': 'integrity_error'}
-                return Response(content, status=status.HTTP_400_BAD_REQUEST)
 
         return Response({}, status=status.HTTP_201_CREATED)
 
-        return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
-
     @action_decorator(detail=True, methods=['GET'])
     def download(self, request, collection_uid=None, collection_item_uid=None, uid=None):
         import os
@@ -559,7 +540,7 @@ class InvitationOutgoingViewSet(InvitationBaseViewSet):
 
     def create(self, request, *args, **kwargs):
         serializer = self.get_serializer(data=request.data)
-        if serializer.is_valid():
+        serializer.is_valid(raise_exception=True)
         collection_uid = serializer.validated_data.get('collection', {}).get('uid')
 
         try:
@@ -574,8 +555,6 @@ class InvitationOutgoingViewSet(InvitationBaseViewSet):
 
         return Response({}, status=status.HTTP_201_CREATED)
 
-        return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
-
     @action_decorator(detail=False, allowed_methods=['GET'], methods=['GET'])
     def fetch_user_profile(self, request):
         username = request.GET.get('username')
@@ -685,7 +664,7 @@ class AuthenticationViewSet(viewsets.ViewSet):
         from datetime import datetime
 
         serializer = AuthenticationLoginChallengeSerializer(data=request.data)
-        if serializer.is_valid():
+        serializer.is_valid(raise_exception=True)
         username = serializer.validated_data.get('username')
         user = self.get_login_user(username)
 
@@ -706,8 +685,6 @@ class AuthenticationViewSet(viewsets.ViewSet):
         }
         return Response(ret, status=status.HTTP_200_OK)
 
-        return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
-
     @action_decorator(detail=False, methods=['POST'])
     def login(self, request):
         outer_serializer = AuthenticationLoginSerializer(data=request.data)