我正在使用Django 1.9开发一个代码库,我正忙于准备升级到1.10
从python social auth迁移到python social auth应用程序django后,我遇到了一个问题。我使用了找到here的步骤
更新设置和url文件后,我遇到以下错误。有人知道我该怎么做吗
Running migrations:
Rendering model states... DONE
Applying social_django.0006_partial... OK
Applying social_django.0007_code_timestamp... OK
Applying social_django.0008_partial_timestamp... OK
Applying social_django.0009_auto_20191118_0520...Traceback (most recent call last):
File "/home/brendan/venvs/social/lib/python3.6/site-packages/django/db/backends/utils.py", line 64, in execute
return self.cursor.execute(sql, params)
psycopg2.IntegrityError: column "modified" contains null values
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "manage.py", line 10, in <module>
execute_from_command_line(sys.argv)
File "/home/brendan/venvs/social/lib/python3.6/site-packages/django/core/management/__init__.py", line 353, in execute_from_command_line
utility.execute()
File "/home/brendan/venvs/social/lib/python3.6/site-packages/django/core/management/__init__.py", line 345, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/home/brendan/venvs/social/lib/python3.6/site-packages/django/core/management/base.py", line 348, in run_from_argv
self.execute(*args, **cmd_options)
File "/home/brendan/venvs/social/lib/python3.6/site-packages/django/core/management/base.py", line 399, in execute
output = self.handle(*args, **options)
File "/home/brendan/venvs/social/lib/python3.6/site-packages/django/core/management/commands/migrate.py", line 200, in handle
executor.migrate(targets, plan, fake=fake, fake_initial=fake_initial)
File "/home/brendan/venvs/social/lib/python3.6/site-packages/django/db/migrations/executor.py", line 92, in migrate
self._migrate_all_forwards(plan, full_plan, fake=fake, fake_initial=fake_initial)
File "/home/brendan/venvs/social/lib/python3.6/site-packages/django/db/migrations/executor.py", line 121, in _migrate_all_forwards
state = self.apply_migration(state, migration, fake=fake, fake_initial=fake_initial)
File "/home/brendan/venvs/social/lib/python3.6/site-packages/django/db/migrations/executor.py", line 198, in apply_migration
state = migration.apply(state, schema_editor)
File "/home/brendan/venvs/social/lib/python3.6/site-packages/django/db/migrations/migration.py", line 123, in apply
operation.database_forwards(self.app_label, schema_editor, old_state, project_state)
File "/home/brendan/venvs/social/lib/python3.6/site-packages/django/db/migrations/operations/fields.py", line 62, in database_forwards
field,
File "/home/brendan/venvs/social/lib/python3.6/site-packages/django/db/backends/base/schema.py", line 396, in add_field
self.execute(sql, params)
File "/home/brendan/venvs/social/lib/python3.6/site-packages/django/db/backends/base/schema.py", line 110, in execute
cursor.execute(sql, params)
File "/home/brendan/venvs/social/lib/python3.6/site-packages/django/db/backends/utils.py", line 79, in execute
return super(CursorDebugWrapper, self).execute(sql, params)
File "/home/brendan/venvs/social/lib/python3.6/site-packages/django/db/backends/utils.py", line 64, in execute
return self.cursor.execute(sql, params)
File "/home/brendan/venvs/social/lib/python3.6/site-packages/django/db/utils.py", line 95, in __exit__
six.reraise(dj_exc_type, dj_exc_value, traceback)
File "/home/brendan/venvs/social/lib/python3.6/site-packages/django/utils/six.py", line 685, in reraise
raise value.with_traceback(tb)
File "/home/brendan/venvs/social/lib/python3.6/site-packages/django/db/backends/utils.py", line 64, in execute
return self.cursor.execute(sql, params)
django.db.utils.IntegrityError: column "modified" contains null values
我遇到了完全相同的问题。({}->;在{}->;{}->;{}->;在{}->;{}={}中设置{})
起初,我认为这是模型和迁移文件中的更改之间的冲突。例如,从这里开始:
django.db.utils.IntegrityError: column "venue_city" contains null values
但是,这看起来并不正确,因为
/usr/local/lib/python2.7/site-packages/social_django/models.py
不包括null=True
:相反,我怀疑问题在于创建列时更新现有行的默认值为null,这会立即发生冲突。这里讨论了这一点:
Django Migrations Add Field with Default as Function of Model
我通过将
null=True
添加到/usr/local/lib/python2.7/site-packages/social_django/migrations/0009_auto_20191118_0520.py
(或安装了social_django的任何地方)的modified
字段并重新运行迁移来克服这个错误更好的方法可能是像对
created
字段所做的那样设置default=django.utils.timezone.now
这通常发生在您升级模块时,并且较新模块的模型具有新的约束(在您的情况下)
一种方法是只删除导致错误的实例。为此,请转到migrations文件夹并手动删除具有
0009_auto_20191118_0520
类型名称的文件,您可以删除,可能是全部,但0001_initial.py file
。在那次跑步之后python ./manage.py make migrations social_django
,它应该更新您的数据库您还可以考虑使用CMD
清除Soalaldjango应用程序的迁移历史记录。按照教程here中的说明操作
编辑: 您可以通过降级到较低版本的social auth应用程序django来克服这一问题。最新版本将在Django 1.9 was social auth应用程序Django==3.1.0上发布
我通过降级到较低版本的social auth应用程序django来克服这个问题。我在Django 1.9上能够获得的最新版本是social auth应用程序Django==3.1.0
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