Resolve minor deprecated features

gracedb/api/v1/main/views.py

@@ -192,13 +192,13 @@ class UserInfoView(RetrieveAPIView):
 
     #def get_serializer_class(self):
     #    # Override so we can use custom behavior for unauthenticated users
-    #    if self.request.user.is_anonymous():
+    #    if self.request.user.is_anonymous:
     #        return AnonymousUserSerializer
     #    else:
     #        return self.serializer_class
 
     def retrieve(self, request, *args, **kwargs):
-        if request.user.is_anonymous():
+        if request.user.is_anonymous:
             output = {'username': 'AnonymousUser'}
         else:
             instance = request.user

gracedb/core/models.py

@@ -109,7 +109,7 @@ class AutoIncrementModel(models.Model):
         query = models.sql.InsertQuery(self.__class__)
         query.insert_values(fields, objs=[self])
         compiler = query.get_compiler(using=self.__class__._base_manager.db)
-        compiler.return_id = meta.has_auto_field and not pk_set
+        compiler.return_id = meta.auto_field is not None and not pk_set
 
         # Useful function
         qn = compiler.quote_name_unless_alias

gracedb/events/reports.py

@@ -131,7 +131,7 @@ def to_png_image(out = sys.stdout):
 @internal_user_required
 def cbc_report(request, format=""):
 
-    if not request.user or not request.user.is_authenticated():
+    if not request.user or not request.user.is_authenticated:
         return HttpResponseForbidden("Forbidden")
 
     if request.method == "GET":