diff --git a/greenmine/scrum/api.py b/greenmine/scrum/api.py
index e780d190..bcd0b3e2 100644
--- a/greenmine/scrum/api.py
+++ b/greenmine/scrum/api.py
@@ -121,6 +121,7 @@ class IssuesAttachmentList(generics.ListCreateAPIView):
                     .filter(content_type=ct)
 
     def pre_save(self, obj):
+        obj.content_type = ContentType.objects.get_for_model(Issue)
         obj.owner = self.request.user
 
 
diff --git a/greenmine/scrum/serializers.py b/greenmine/scrum/serializers.py
index 8d2bbc31..ed497aae 100644
--- a/greenmine/scrum/serializers.py
+++ b/greenmine/scrum/serializers.py
@@ -49,11 +49,17 @@ class MilestoneSerializer(serializers.ModelSerializer):
 
 
 class AttachmentSerializer(serializers.ModelSerializer):
-    issue = serializers.Field(source='object_id')
+    url = serializers.SerializerMethodField('get_url')
+
+    def get_url(self, obj):
+        # FIXME: add sites or correct url.
+        return "http://localhost:8000{0}".format(obj.attached_file.url)
 
     class Meta:
         model = Attachment
-        fields = ('id', 'project', 'owner', 'attached_file', 'created_date', 'issue')
+        fields = ('id', 'project', 'owner', 'attached_file',
+                  'created_date', 'object_id', 'url')
+        read_only_fields = ('owner',)
 
 
 class TaskSerializer(serializers.ModelSerializer):