Django 1.9
Python 3.4
我使用AbstractBaseUser类创建了一个自定义用户模型。以下是代码。
class UserModel(AbstractBaseUser):
# custom user class
SYSTEM = 0
TENANT = 1
parent_type_choices = (
(SYSTEM, 'System'),
(TENANT, 'Tenant')
)
sys_id = models.BigIntegerField(primary_key=True, blank=False)
parent_type = models.PositiveIntegerField(choices=parent_type_choices, null=False, blank=False)
parent_sys_id = models.ForeignKey('tenant.TenantModel', on_delete = models.SET_NULL, null=True, blank=True)
last_name = models.CharField(null=False, blank=False, max_length=40)
first_name = models.CharField(max_length=40, null=False, blank=False)
display_name = models.CharField(max_length=80, unique=True, null=False, blank=False)
login = models.CharField(max_length=40, unique=True, null=False, blank=False)
authentication_method = models.CharField(max_length=80)
pwd = models.CharField(max_length=40)
access_valid_start = models.DateTimeField()
access_valid_end = models.DateTimeField()
created_when = models.DateTimeField()
created_by = models.BigIntegerField()
last_updated_when = models.DateTimeField()
last_updated_by = models.BigIntegerField()
notes = models.CharField(max_length=2048)
USERNAME_FIELD = "login"
class Meta:
app_label = "accounts"
db_table = "Users"
当我迁移更改时，表在db中创建了两个额外的字段，我没有定义。 Password和last_login已添加。
desc Users;
+-----------------------+------------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-----------------------+------------------+------+-----+---------+-------+
| password | varchar(128) | NO | | NULL | |
| last_login | datetime | YES | | NULL | |
| sys_id | bigint(20) | NO | PRI | NULL | |
| parent_type | int(10) unsigned | NO | | NULL | |
| last_name | varchar(40) | NO | | NULL | |
| first_name | varchar(40) | NO | | NULL | |
| display_name | varchar(80) | NO | UNI | NULL | |
| login | varchar(40) | NO | UNI | NULL | |
| authentication_method | varchar(80) | NO | | NULL | |
| pwd | varchar(40) | NO | | NULL | |
| access_valid_start | datetime | NO | | NULL | |
| access_valid_end | datetime | NO | | NULL | |
| created_when | datetime | NO | | NULL | |
| created_by | bigint(20) | NO | | NULL | |
| last_updated_when | datetime | NO | | NULL | |
| last_updated_by | bigint(20) | NO | | NULL | |
| notes | varchar(2048) | NO | | NULL | |
| parent_sys_id_id | bigint(20) | YES | MUL | NULL | |
+-----------------------+------------------+------+-----+---------+-------+
为什么会这样？如何删除这些字段？