Core Python Programming (2nd Edition)

112
113 if__name__ == '__main__':
114 main()
Example 21.3. SQLObject ORM Example (ushuffle_so.py)
This "user shuffle" application features SQLObject paired up with the MySQL database as its
backend.
1 #!/usr/bin/env python
2
3 import os
4 from random import randrange as rrange
5 from sqlobject import *
6 from ushuffle_db import NAMES, randName
7
8 DBNAME = 'test'
9 COLSIZ = 10
10 FIELDS = ('login', 'uid', 'prid')
11
12 class MySQLObject(object):
13 def __init__(self, db, dbName):
14 import MySQLdb
15 import _mysql_exceptions
16 url = 'mysql://localhost/%s' % DBNAME
17
18 while True:
19 cxn = connectionForURI(url)
20 sqlhub.processConnection = cxn
21 #cxn.debug = True
22 try:
23 class Users(SQLObject):
24 class sqlmeta:
25 fromDatabase = True
26 login = StringCol(length=8)
27 uid = IntCol()
28 prid = IntCol()
29 break
30 except _mysql_exceptions.ProgrammingError, e:
31 class Users(SQLObject):
32 login = StringCol(length=8)
33 uid = IntCol()
34 prid = IntCol()
35 break
36 except _mysql_exceptions.OperationalError, e:
37 cxn1 = sqlhub.processConnection=
connectionForURI('mysql://root@localhost')
38 cxn1.query("CREATE DATABASE %s" % DBNAME)
39 cxn1.query("GRANT ALL ON %s.* TO ''@'
localhost'" % DBNAME)
40 cxn1.close()
41 self.users = Users
42 self.cxn = cxn
43