Don't try to return a serializer if there is no request object. Used when the API view is being introspected.

Signed-off-by: Michael Price <loneviking72@gmail.com>

mayan/apps/document_states/api_views.py

@@ -73,6 +73,12 @@ class APIWorkflowDocumentTypeList(generics.ListCreateAPIView):
 
         return self.get_workflow().document_types.all()
 
+    def get_serializer(self, *args, **kwargs):
+        if not self.request:
+            return None
+
+        return super(APIWorkflowDocumentTypeList, self).get_serializer(*args, **kwargs)
+
     def get_serializer_class(self):
         if self.request.method == 'GET':
             return WorkflowDocumentTypeSerializer
@@ -210,6 +216,12 @@ class APIWorkflowListView(generics.ListCreateAPIView):
         """
         return super(APIWorkflowListView, self).get(*args, **kwargs)
 
+    def get_serializer(self, *args, **kwargs):
+        if not self.request:
+            return None
+
+        return super(APIWorkflowListView, self).get_serializer(*args, **kwargs)
+
     def get_serializer_class(self):
         if self.request.method == 'GET':
             return WorkflowSerializer
@@ -247,6 +259,12 @@ class APIWorkflowView(generics.RetrieveUpdateDestroyAPIView):
 
         return super(APIWorkflowView, self).get(*args, **kwargs)
 
+    def get_serializer(self, *args, **kwargs):
+        if not self.request:
+            return None
+
+        return super(APIWorkflowView, self).get_serializer(*args, **kwargs)
+
     def get_serializer_class(self):
         if self.request.method == 'GET':
             return WorkflowSerializer
@@ -397,6 +415,12 @@ class APIWorkflowTransitionListView(generics.ListCreateAPIView):
     def get_queryset(self):
         return self.get_workflow().transitions.all()
 
+    def get_serializer(self, *args, **kwargs):
+        if not self.request:
+            return None
+
+        return super(APIWorkflowTransitionListView, self).get_serializer(*args, **kwargs)
+
     def get_serializer_class(self):
         if self.request.method == 'GET':
             return WorkflowTransitionSerializer
@@ -459,6 +483,12 @@ class APIWorkflowTransitionView(generics.RetrieveUpdateDestroyAPIView):
     def get_queryset(self):
         return self.get_workflow().transitions.all()
 
+    def get_serializer(self, *args, **kwargs):
+        if not self.request:
+            return None
+
+        return super(APIWorkflowTransitionView, self).get_serializer(*args, **kwargs)
+
     def get_serializer_class(self):
         if self.request.method == 'GET':
             return WorkflowTransitionSerializer
@@ -598,6 +628,12 @@ class APIWorkflowInstanceLogEntryListView(generics.ListCreateAPIView):
 
         return document
 
+    def get_serializer(self, *args, **kwargs):
+        if not self.request:
+            return None
+
+        return super(APIWorkflowInstanceLogEntryListView, self).get_serializer(*args, **kwargs)
+
     def get_serializer_class(self):
         if self.request.method == 'GET':
             return WorkflowInstanceLogEntrySerializer