fix column.create() properly

docs/changelog.rst

@@ -8,7 +8,8 @@ Fixed Bugs
 ******************
 
 - docs/_build is excluded from source tarball builds
-
+- use table.append_column() instead of column._set_parent() in
+  ChangesetColumn.add_to_table()
 
 0.7 (2011-05-27)
 ---------------------------

migrate/changeset/schema.py

@@ -555,7 +555,10 @@ populated with defaults
 
     def add_to_table(self, table):
         if table is not None  and self.table is None:
-            self._set_parent(table)
+            if SQLA_07:
+                table.append_column(self)
+            else:
+                self._set_parent(table)
 
     def _col_name_in_constraint(self,cons,name):
         return False

migrate/tests/changeset/test_changeset.py

@@ -169,8 +169,6 @@ class TestAddDropColumn(fixture.DB):
 
         # create column with fk
         col = Column('data', Integer, ForeignKey(reftable.c.id))
-        if SQLA_07:
-            self.table.append_column(col)
         col.create(self.table)
 
         # check if constraint is added