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Diffstat (limited to 'lib/sqlalchemy/sql/expression.py')
| -rw-r--r-- | lib/sqlalchemy/sql/expression.py | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/lib/sqlalchemy/sql/expression.py b/lib/sqlalchemy/sql/expression.py index f4611de6d..3d95948cb 100644 --- a/lib/sqlalchemy/sql/expression.py +++ b/lib/sqlalchemy/sql/expression.py @@ -1621,6 +1621,15 @@ class FromClause(Selectable): from sqlalchemy.sql.util import ClauseAdapter return ClauseAdapter(alias).traverse(self, clone=True) + def correspond_on_equivalents(self, column, equivalents): + col = self.corresponding_column(column, require_embedded=True) + if col is None and col in equivalents: + for equiv in equivalents[col]: + nc = self.corresponding_column(equiv, require_embedded=True) + if nc: + return nc + return col + def corresponding_column(self, column, require_embedded=False): """Given a ``ColumnElement``, return the exported ``ColumnElement`` object from this ``Selectable`` which corresponds to that |