blob: 636ebd7535ed9ca2ef50366a01c89b1c4b0c9901 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
|
import sqlalchemy as sql
from sqlalchemy.orm import sessionmaker
def upgrade(migrate_engine):
meta = sql.MetaData()
meta.bind = migrate_engine
user_table = sql.Table('user', meta, autoload=True)
user_table.c.name.alter(type=sql.String(255))
def downgrade(migrate_engine):
meta = sql.MetaData()
meta.bind = migrate_engine
user_table = sql.Table('user', meta, autoload=True)
if migrate_engine.name != 'mysql':
# NOTE(aloga): sqlite does not enforce length on the
# VARCHAR types: http://www.sqlite.org/faq.html#q9
# postgresql and DB2 do not truncate.
maker = sessionmaker(bind=migrate_engine)
session = maker()
for user in session.query(user_table).all():
values = {'name': user.name[:64]}
update = (user_table.update().
where(user_table.c.id == user.id).
values(values))
migrate_engine.execute(update)
session.commit()
session.close()
user_table.c.name.alter(type=sql.String(64))
|
