Fix kvesteri#238: handling hardcoded string with options.tablename at…

…tribute via version_manager

sqlalchemy_continuum/utils.py

@@ -9,6 +9,7 @@
     get_primary_keys,
     identity,
     naturally_equivalent,
+    get_mapper
 )
 
 from .exc import ClassNotVersioned
@@ -133,17 +134,19 @@ def version_table(table):
 
     :param table: SQLAlchemy Table object
     """
+    table_model_class = get_mapper(table).class_  # get the table Model class name
+    suffixed_table_name = option(table_model_class, 'table_name') % table.name # get table_name attribute from option of version_manager
     if table.schema:
         return table.metadata.tables[
-            table.schema + '.' + table.name + '_version'
+            table.schema + '.' + suffixed_table_name
         ]
     elif table.metadata.schema:
         return table.metadata.tables[
-            table.metadata.schema + '.' + table.name + '_version'
+            table.metadata.schema + '.' + suffixed_table_name
         ]
     else:
         return table.metadata.tables[
-            table.name + '_version'
+            suffixed_table_name
         ]