django.db.utils.ProgrammingError：从 SQLite 迁移到 Postgres 后表不存在答案

【问题标题】：django.db.utils.ProgrammingError: table does not exist after migrating to Postgres from SQLitedjango.db.utils.ProgrammingError：从 SQLite 迁移到 Postgres 后表不存在
【发布时间】：2021-11-03 05:45:43
【问题描述】：

更改我的设置并迁移到 Postgres 后，我在执行时遇到此错误迁移，我之前删除了所有迁移文件夹，因为 database inconsistency 有类似的问题，现在我的应用级目录中没有任何迁移，我有 DB em> 备份，但是，我该如何解决这个问题，感谢任何帮助，在此先感谢

数据库设置

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.postgresql_psycopg2',
        'NAME': 'postgres',
        'USER': 'postgres',
        'PASSWORD': 'mypass',
        'HOST': 'localhost',
        'PORT': '5432',
    }
}

追踪

Traceback (most recent call last):
  File "C:\Users\atifs\Documents\food_deliveryapp\fooddelivery\manage.py", line 22, in <module>
    main()
  File "C:\Users\atifs\Documents\food_deliveryapp\fooddelivery\manage.py", line 18, in main
    execute_from_command_line(sys.argv)
  File "C:\Users\atifs\Documents\food_deliveryapp\virtual-env\lib\site-packages\django\core\management\__init__.py", line 419, in execute_from_command_line
    utility.execute()
  File "C:\Users\atifs\Documents\food_deliveryapp\virtual-env\lib\site-packages\django\core\management\__init__.py", line 413, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "C:\Users\atifs\Documents\food_deliveryapp\virtual-env\lib\site-packages\django\core\management\base.py", line 354, in run_from_argv
    self.execute(*args, **cmd_options)
  File "C:\Users\atifs\Documents\food_deliveryapp\virtual-env\lib\site-packages\django\core\management\base.py", line 398, in execute
    output = self.handle(*args, **options)
  File "C:\Users\atifs\Documents\food_deliveryapp\virtual-env\lib\site-packages\django\core\management\base.py", line 89, in wrapped
    res = handle_func(*args, **kwargs)
  File "C:\Users\atifs\Documents\food_deliveryapp\virtual-env\lib\site-packages\django\core\management\commands\migrate.py", line 244, in handle
    post_migrate_state = executor.migrate(
  File "C:\Users\atifs\Documents\food_deliveryapp\virtual-env\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\atifs\Documents\food_deliveryapp\virtual-env\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\atifs\Documents\food_deliveryapp\virtual-env\lib\site-packages\django\db\migrations\executor.py", line 230, in apply_migration
    migration_recorded = True
  File "C:\Users\atifs\Documents\food_deliveryapp\virtual-env\lib\site-packages\django\db\backends\base\schema.py", line 118, in __exit__
    self.execute(sql)
  File "C:\Users\atifs\Documents\food_deliveryapp\virtual-env\lib\site-packages\django\db\backends\base\schema.py", line 145, in execute
    cursor.execute(sql, params)
  File "C:\Users\atifs\Documents\food_deliveryapp\virtual-env\lib\site-packages\django\db\backends\utils.py", line 98, in execute
    return super().execute(sql, params)
  File "C:\Users\atifs\Documents\food_deliveryapp\virtual-env\lib\site-packages\django\db\backends\utils.py", line 66, in execute
    return self._execute_with_wrappers(sql, params, many=False, executor=self._execute)
  File "C:\Users\atifs\Documents\food_deliveryapp\virtual-env\lib\site-packages\django\db\backends\utils.py", line 75, in _execute_with_wrappers
    return executor(sql, params, many, context)
  File "C:\Users\atifs\Documents\food_deliveryapp\virtual-env\lib\site-packages\django\db\backends\utils.py", line 84, in _execute
    return self.cursor.execute(sql, params)
  File "C:\Users\atifs\Documents\food_deliveryapp\virtual-env\lib\site-packages\django\db\utils.py", line 90, in __exit__
    raise dj_exc_value.with_traceback(traceback) from exc_value
  File "C:\Users\atifs\Documents\food_deliveryapp\virtual-env\lib\site-packages\django\db\backends\utils.py", line 84, in _execute
    return self.cursor.execute(sql, params)
django.db.utils.ProgrammingError: relation "customers_user" does not exist

【问题讨论】：

你不应该删除你的迁移文件夹，创建新的迁移文件夹并将空的 init.py 放入其中，然后运行 makemigrations 并迁移，注意前后两个_初始化

标签： django postgresql django-migrations

【解决方案1】：

正如 V.D 所说，我错误地删除了应用程序内的所有迁移文件夹，我不得不使用 init.py 重新创建这些文件夹，然后运行迁移，问题现已解决

【讨论】：