From: Mike Bayer <mike_mp@zzzcomputing.com>
Date: Fri, 28 Mar 2014 18:58:45 +0000 (-0400)
Subject: use correct __mro__ for new mssql _Exec classes, fix #192
X-Git-Tag: rel_0_6_4~1
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=58c188755a7c6228cf77fa9b656c79d3e38cc576;p=thirdparty%2Fsqlalchemy%2Falembic.git

use correct __mro__ for new mssql _Exec classes, fix #192
---

diff --git a/alembic/ddl/mssql.py b/alembic/ddl/mssql.py
index 7bfe2932..fece08bd 100644
--- a/alembic/ddl/mssql.py
+++ b/alembic/ddl/mssql.py
@@ -124,13 +124,13 @@ class MSSQLImpl(DefaultImpl):
             )
         super(MSSQLImpl, self).drop_column(table_name, column)
 
-class _ExecDropConstraint(ClauseElement, Executable):
+class _ExecDropConstraint(Executable, ClauseElement):
     def __init__(self, tname, colname, type_):
         self.tname = tname
         self.colname = colname
         self.type_ = type_
 
-class _ExecDropFKConstraint(ClauseElement, Executable):
+class _ExecDropFKConstraint(Executable, ClauseElement):
     def __init__(self, tname, colname):
         self.tname = tname
         self.colname = colname
diff --git a/tests/__init__.py b/tests/__init__.py
index cd721ae4..9df27556 100644
--- a/tests/__init__.py
+++ b/tests/__init__.py
@@ -182,6 +182,7 @@ def op_fixture(dialect='default', as_sql=False, naming_convention=None):
         def _exec(self, construct, *args, **kw):
             if isinstance(construct, string_types):
                 construct = text(construct)
+            assert construct.supports_execution
             sql = text_type(construct.compile(dialect=self.dialect))
             sql = re.sub(r'[\n\t]', '', sql)
             self.assertion.append(