diff options
Diffstat (limited to 'lib/sqlalchemy/sql/ddl.py')
| -rw-r--r-- | lib/sqlalchemy/sql/ddl.py | 33 |
1 files changed, 13 insertions, 20 deletions
diff --git a/lib/sqlalchemy/sql/ddl.py b/lib/sqlalchemy/sql/ddl.py index ef0906328..f415aeaff 100644 --- a/lib/sqlalchemy/sql/ddl.py +++ b/lib/sqlalchemy/sql/ddl.py @@ -855,26 +855,19 @@ class SchemaDropper(DDLBase): ) collection = [(t, ()) for t in unsorted_tables] else: - util.raise_( - exc.CircularDependencyError( - err2.args[0], - err2.cycles, - err2.edges, - msg="Can't sort tables for DROP; an " - "unresolvable foreign key " - "dependency exists between tables: %s. Please ensure " - "that the ForeignKey and ForeignKeyConstraint objects " - "involved in the cycle have " - "names so that they can be dropped using " - "DROP CONSTRAINT." - % ( - ", ".join( - sorted([t.fullname for t in err2.cycles]) - ) - ), - ), - from_=err2, - ) + raise exc.CircularDependencyError( + err2.args[0], + err2.cycles, + err2.edges, + msg="Can't sort tables for DROP; an " + "unresolvable foreign key " + "dependency exists between tables: %s. Please ensure " + "that the ForeignKey and ForeignKeyConstraint objects " + "involved in the cycle have " + "names so that they can be dropped using " + "DROP CONSTRAINT." + % (", ".join(sorted([t.fullname for t in err2.cycles]))), + ) from err2 seq_coll = [ s |