fix incorrect var for log message

diff --git a/alembic/autogenerate/compare.py b/alembic/autogenerate/compare.py
index 4fb61ab887f21884b0e1e23aee8a67cb0e9b4d15..72180ca9934afa5edae877fc557d68b961324021 100644 (file)
--- a/alembic/autogenerate/compare.py
+++ b/alembic/autogenerate/compare.py
@@ -226,7 +226,7 @@ def _compare_uniques(schema, tname, object_filters, conn_table,
             diffs.append(("remove_constraint", conn_constraint))
             diffs.append(("add_constraint", meta_constraint))
             log.info("Detected changed unique constraint '%s' on '%s':%s",
-                key, tname, ' columns %r to %r' % (conn_cols, meta_cols)
+                meta_constraint.name, tname, ' columns %r to %r' % (conn_cols, meta_cols)
             )
 
     # inspector.get_indexes() can conflate indexes and unique