Sql Django:使auth_user.email不区分大小写且唯一且可为空

我想使

auth_user.email

不区分大小写，是唯一的、可空的和默认空的。以下几点几乎奏效：

from django.db.models.signals import post_syncdb
import app.models

SQLITE_AUTH_REFORM = [
"PRAGMA writable_schema = 1;",
"""UPDATE SQLITE_MASTER SET SQL =
'CREATE TABLE auth_user (
    "id" integer NOT NULL PRIMARY KEY,
    "username" varchar(30) NOT NULL UNIQUE,
    "first_name" varchar(30) NOT NULL,
    "last_name" varchar(30) NOT NULL,
    "email" varchar(75) DEFAULT NULL,
    "password" varchar(128) NOT NULL,
    "is_staff" bool NOT NULL,
    "is_active" bool NOT NULL,
    "is_superuser" bool NOT NULL,
    "last_login" datetime NOT NULL,
    "date_joined" datetime NOT NULL
)' WHERE NAME = 'auth_user';""",
"PRAGMA writable_schema = 0;",
]

def post_syncdb_callback(sender, **kwargs):
    from django.db import connections
    from django.conf import settings
    cursor = connections['default'].cursor()

    if 'sqlite' in settings.DATABASES['default']['ENGINE']:
        for stmt in SQLITE_AUTH_REFORM:
            cursor.execute(stmt)
        cursor.execute(
            "CREATE UNIQUE INDEX IF NOT EXISTS auth_user_email_unique "
            "ON auth_user (email COLLATE NOCASE);"
        )
    else:  # Oracle
        cursor.execute(
            "CREATE UNIQUE INDEX auth_user_email_unique "
            "ON auth_user (upper(email));"
        )
    cursor.cursor.close()

post_syncdb.connect(post_syncdb_callback, sender=app.models)

我能

让我心满意足。而且

User.objects.create(username=str(random.random()), email='Foo')
User.objects.create(username=str(random.random()), email='foo')
...
IntegrityError: column email is not unique

唯一的问题是

默认NULL

似乎不起作用：

User.objects.create（username=str（random.random（））

创建一个带有空字符串电子邮件的用户

但是，在单元测试中，我相信有什么事情会阻止post syncdb钩子工作：

class DjangoUserTest(TestCase):

    def test_unique_nullable_email(self):
        import IPython; IPython.embed()
        u1 = User.objects.create(username="u1", email=None)
        u2 = User.objects.create(username="u2", email=None)

我可以进入ipython外壳，看到表已明显修改：

In [1]: from django.db import connection

In [2]: c = connection.cursor()

In [3]: r = c.execute("select `sql` from sqlite_master WHERE tbl_name = 'auth_user';")

In [4]: r.fetchall()
Out[4]: 
[(u'CREATE TABLE auth_user (\n    "id" integer NOT NULL PRIMARY KEY,\n    "username" varchar(30) NOT NULL UNIQUE,\n    "first_name" varchar(30) NOT NULL,\n    "last_name" varchar(30) NOT NULL,\n    "email" varchar(75) DEFAULT NULL,\n    "password" varchar(128) NOT NULL,\n    "is_staff" bool NOT NULL,\n    "is_active" bool NOT NULL,\n    "is_superuser" bool NOT NULL,\n    "last_login" datetime NOT NULL,\n    "date_joined" datetime NOT NULL\n)',),
 (None,),
 (u'CREATE UNIQUE INDEX auth_user_email_unique ON auth_user (email COLLATE NOCASE)',)]

但是，在尝试创建时，我得到，

IntegrityError:auth_user.email可能不为NULL

。当

从sqlite_master选择sql，其中tbl_name='auth_user'时，这是如何发生的

清楚地表示

“email”varchar（75）默认为NULL

。我觉得我只需要提交post_syncdb之类的东西。有什么想法吗

---

更新：没有任何

connection.commit（）

，

cursor.close（）

帮助，使用

TransactionTestCase

没有帮助。

您需要在django 1.5中使用可配置的用户模型选项-这是正确的方法。hmmm。。您必须更改django.contrib.auth中的模型，这是非常不推荐的。但是，同步后挂钩在单元测试之前运行，看起来该字段可以为空

In [1]: from django.db import connection

In [2]: c = connection.cursor()

In [3]: r = c.execute("select `sql` from sqlite_master WHERE tbl_name = 'auth_user';")

In [4]: r.fetchall()
Out[4]: 
[(u'CREATE TABLE auth_user (\n    "id" integer NOT NULL PRIMARY KEY,\n    "username" varchar(30) NOT NULL UNIQUE,\n    "first_name" varchar(30) NOT NULL,\n    "last_name" varchar(30) NOT NULL,\n    "email" varchar(75) DEFAULT NULL,\n    "password" varchar(128) NOT NULL,\n    "is_staff" bool NOT NULL,\n    "is_active" bool NOT NULL,\n    "is_superuser" bool NOT NULL,\n    "last_login" datetime NOT NULL,\n    "date_joined" datetime NOT NULL\n)',),
 (None,),
 (u'CREATE UNIQUE INDEX auth_user_email_unique ON auth_user (email COLLATE NOCASE)',)]