Merge branch 't69-add-superior'

leobject/datasources/ledatasourcesql.py

             cur.execute('SELECT last_insert_id()')
             relation_id, = cur.fetchone()
 
+        if nature == 'parent':
+            parent_superiors = lesup.superiors()
+            for superior in parent_superiors:
+                depth = depth - 1 if depth is not None else 1
+                self.add_relation(lesup=superior.lodel_id, lesub=lesub.lodel_id, nature='parent', depth=depth, rank=rank)
+
         return relation_id
 
     ## @brief Fetch a superiors list ordered by depth for a LeType

leobject/leobject.py

         if leo_is_sup:
             return cls._datasource.get_subordinates(leo, nature)
         else:
-            return cls._datasource.get_superior(leo, nature)
+            return cls._datasource.get_superiors(leo, nature)
     
     ## @brief Prepare a field_list
     # @param field_list list : List of string representing fields