Fixed the call to get method in LeRelation.get_max_rank()

leapi/lerelation.py

@@ -133,7 +133,7 @@ class _LeRelation(lecrud._LeCrud):
     ## @returns The maximum assignable rank for this relation
     # @todo implementation
     def get_max_rank(self):
-        max_rank_result = self.__class__.get(query_filters=['*'],field_list=['rank'], order=[('rank', 'DESC')], limit=1)
+        max_rank_result = self.__class__.get(field_list=['rank'], order=[('rank', 'DESC')], limit=1)
         max_rank = max_rank_result[0].rank
         return max_rank+1