问题描述
我对 Django 很陌生，在尝试创建自定义用户时遇到了问题。 我按照列出的所有步骤创建了一个，但因为我最初使用默认的 User 模型，所以我删除了所有迁移和我的 postgres 数据库以从头开始（如果没有，我读它会导致问题）。
makemigrations 工作正常，但是当我想迁移时出现以下错误：
create trigger testtrigger
on invoices
after insert
as
begin
set nocount,xact_abort on;
-- Check if *any* of the inserted products exceeds the current stock levels
-- Taking into account the possibility of the same product occurring in multiple invoices
-- You Could use similar logic to capture the products for which the stock level was exceeded
-- However its very complex to only rollback those which are wrong.
-- Really this should be your last line of defence,only used to ensure database integrity,so you should be checking stock levels before Now
-- And therefore it shouldn't matter rolling everything back
if exists (
select 1
from Inserted I
inner join Products P on P.ProductId = I.productId
where productID not in (1,2,3,4,5,6)
group by P.Id,P.Stock
having sum(I.Quantity) > P.Stock;
) begin
-- If you want to do something in your calling code you need to throw an exception. Printing is only relevent while testing in SSMS.
-- Throwing an exception will also roll back the transaction
throw 51000,'Not enough Stock.',0;
end;
end;
django.db.utils.ProgrammingError: relation "cyclabApp_customuser" does not exist.
Applying admin.0001_initial...Traceback (most recent call last):
File "/usr/local/lib/python3.9/site-packages/django/db/backends/utils.py",line 84,in _execute
return self.cursor.execute(sql,params)
psycopg2.errors.UndefinedTable: relation "cyclabApp_customuser" does not exist
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "/app/manage.py",line 22,in <module>
main()
File "/app/manage.py",line 18,in main
execute_from_command_line(sys.argv)
File "/usr/local/lib/python3.9/site-packages/django/core/management/__init__.py",line 401,in execute_from_command_line
utility.execute()
File "/usr/local/lib/python3.9/site-packages/django/core/management/__init__.py",line 395,in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/usr/local/lib/python3.9/site-packages/django/core/management/base.py",line 330,in run_from_argv
self.execute(*args,**cmd_options)
File "/usr/local/lib/python3.9/site-packages/django/core/management/base.py",line 371,in execute
output = self.handle(*args,**options)
File "/usr/local/lib/python3.9/site-packages/django/core/management/base.py",line 85,in wrapped
res = handle_func(*args,**kwargs)
File "/usr/local/lib/python3.9/site-packages/django/core/management/commands/migrate.py",line 243,in handle
post_migrate_state = executor.migrate(
File "/usr/local/lib/python3.9/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 "/usr/local/lib/python3.9/site-packages/django/db/migrations/executor.py",line 147,in _migrate_all_forwards
state = self.apply_migration(state,migration,line 229,in apply_migration
migration_recorded = True
File "/usr/local/lib/python3.9/site-packages/django/db/backends/base/schema.py",line 115,in __exit__
self.execute(sql)
File "/usr/local/lib/python3.9/site-packages/django/db/backends/base/schema.py",line 142,in execute
cursor.execute(sql,params)
File "/usr/local/lib/python3.9/site-packages/django/db/backends/utils.py",line 98,in execute
return super().execute(sql,line 66,in execute
return self._execute_with_wrappers(sql,params,many=False,executor=self._execute)
File "/usr/local/lib/python3.9/site-packages/django/db/backends/utils.py",line 75,in _execute_with_wrappers
return executor(sql,many,context)
File "/usr/local/lib/python3.9/site-packages/django/db/backends/utils.py",params)
File "/usr/local/lib/python3.9/site-packages/django/db/utils.py",line 90,in __exit__
raise dj_exc_value.with_traceback(traceback) from exc_value
File "/usr/local/lib/python3.9/site-packages/django/db/backends/utils.py",params)
我到处寻找类似的问题及其解决方案，但到目前为止没有运气试图解决这个问题......
在此先感谢您的帮助！！
解决方法
好的，我解决了。 显然，我缺少 UserManager 的模型。在我添加后工作。 :-)
class UserManager(BaseUserManager):
def create_user(
self,email,first_name,last_name,password=None,commit=True):
"""
Creates and saves a User with the given email,first name,last name
and password.
"""
if not email:
raise ValueError(_('Users must have an email address'))
if not first_name:
raise ValueError(_('Users must have a first name'))
if not last_name:
raise ValueError(_('Users must have a last name'))
user = self.model(
email=self.normalize_email(email),first_name=first_name,last_name=last_name,)
user.set_password(password)
if commit:
user.save(using=self._db)
return user