在“model”上应用makmigation时没有问题,但migration命令引发异常“error”ValueError:int()的无效文本,以10为基数:“null”。
我在“emails\u for\u help”帮助字段中进行更改时出现此错误
我尝试了fake\u迁移和迁移,但没有用
模型
class Setup_user(models.Model):
organization=models.CharField(max_length=200,blank=False,default="")
email_id=models.EmailField(unique=True)
CEO = 'CEO'
GENERAL_MANAGER = 'GM'
JCHOICES = (
(CEO, 'CEO'),
(GENERAL_MANAGER, 'General Manager'),
)
Designation = models.CharField(max_length=5,choices=JCHOICES)
LEVEL1 = "L1"
LEVEL2 = "L2"
LCHOICES = (
(LEVEL1,"Level 1"),
(LEVEL2,"Level 2"),
)
job_level=models.CharField(max_length=2,choices=LCHOICES)
EMAIL_CHOICES = ((str(q.email), str(q.email)) for q in User.objects.all())
emails_for_help = MultiSelectField(choices=EMAIL_CHOICES,default="null",max_length=5000,help_text="select with whom you want to share knowledge")
def __str__(self):
return self.email_id
错误:
C:\Users\Ekatech7\PycharmProjects\baseproject>python manage.py migrate
Operations to perform:
Apply all migrations: admin, auth, contenttypes, pkm_app, sessions
Running migrations:
Applying pkm_app.0015_auto_20180417_1723...Traceback (most recent call
last):
File "manage.py", line 15, in <module>
execute_from_command_line(sys.argv)
File "C:\Users\Ekatech7\PycharmProjects\baseproject\venv\lib\site-
packages\django\core\management\__init__.py", line 371, in
execute_from_command_line
utility.execute()
File "C:\Users\Ekatech7\PycharmProjects\baseproject\venv\lib\site-
packages\django\core\management\__init__.py", line 365, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "C:\Users\Ekatech7\PycharmProjects\baseproject\venv\lib\site-
packages\django\core\management\base.py", line 288, in run_from_argv
self.execute(*args, **cmd_options)
File "C:\Users\Ekatech7\PycharmProjects\baseproject\venv\lib\site-
packages\django\core\management\base.py", line 335, in execute
output = self.handle(*args, **options)
File "C:\Users\Ekatech7\PycharmProjects\baseproject\venv\lib\site-
packages\django\core\management\commands\migrate.py", line 200, in handle
fake_initial=fake_initial,
File "C:\Users\Ekatech7\PycharmProjects\baseproject\venv\lib\site-
packages\django\db\migrations\executor.py", line 117, in migrate
state = self._migrate_all_forwards(state, plan, full_plan, fake=fake,
fake_initial=fake_initial)
File "C:\Users\Ekatech7\PycharmProjects\baseproject\venv\lib\site-
packages\django\db\migrations\executor.py", line 147, in
_migrate_all_forwards
state = self.apply_migration(state, migration, fake=fake,
fake_initial=fake_initial)
File "C:\Users\Ekatech7\PycharmProjects\baseproject\venv\lib\site-
packages\django\db\migrations\executor.py", line 244, in apply_migration
state = migration.apply(state, schema_editor)
File "C:\Users\Ekatech7\PycharmProjects\baseproject\venv\lib\site-
packages\django\db\migrations\migration.py", line 122, in apply
operation.database_forwards(self.app_label, schema_editor, old_state,
project_state)
File "C:\Users\Ekatech7\PycharmProjects\baseproject\venv\lib\site-
packages\django\db\migrations\operations\fields.py", line 84, in
database_forwards
field,
File "C:\Users\Ekatech7\PycharmProjects\baseproject\venv\lib\site-
packages\django\db\backends\sqlite3\schema.py", line 306, in add_field
self._remake_table(model, create_field=field)
File "C:\Users\Ekatech7\PycharmProjects\baseproject\venv\lib\site -
packages\django\db\backends\sqlite3\schema.py", line 178, in _remake_table
self.effective_default(create_field)
File "C:\Users\Ekatech7\PycharmProjects\baseproject\venv\lib\site-
packages\django\db\backends\base\schema.py", line 224, in effective_default
default = field.get_db_prep_save(default, self.connection)
文件“C:\Users\Ekatech7\PycharmProjects\baseproject\venv\lib\site”-
包\django\db\models\fields\related。py”,第936行,在get\u db\u prep\u save中
返回自我。target\u字段。get\u db\u prep\u save(值,连接=连接)
文件“C:\Users\Ekatech7\PycharmProjects\baseproject\venv\lib\site”-
软件包\django\db\models\fields\uu init\uuuuuuuuuuu。py”,第767行,在get\u db\u prep\u save中
返回自我。get\u db\u prep\u值(值,connection=连接,prepared=False)
文件“C:\Users\Ekatech7\PycharmProjects\baseproject\venv\lib\site”-
软件包\django\db\models\fields\uu init\uuuuuuuuuuu。py”,第939行,英寸
获取\u db\u prep\u值
值=自身。get\u prep\u值(value)
文件“C:\Users\Ekatech7\PycharmProjects\baseproject\venv\lib\site”-
软件包\django\db\models\fields\uu init\uuuuuuuuuuu。py”,第947行,在get\u prep\u值中
return int(值)
ValueError:基数为10的int()的文本无效:“null”