同步PostgreSQL和Django项目

a64a0gku  于 2022-11-04  发布在  PostgreSQL
关注(0)|答案(1)|浏览(119)

我有一个遗留的数据库,我上传到PostgreSQL,并与Django连接。然后,我直接在PostgreSQL中运行SQL脚本来更改数据库(我删除了一些列),然后手动删除了djangomodels.py中的一些列。从那时起,我无法进行任何迁移,每当我尝试迁移时,Django都试图删除我手动删除的列,并给出了下面的错误.我如何同步我的DB和Django项目,以便我可以对项目进行修改?

django.db.utils.ProgrammingError: column "confidence" of relation "Location" does not exist

编辑:

$ python manage.py migrate
D:\projects\map\dataXProject
(0.328)
            SELECT
                c.relname,
                CASE
                    WHEN c.relispartition THEN 'p'
                    WHEN c.relkind IN ('m', 'v') THEN 'v'
                    ELSE 't'
                END
            FROM pg_catalog.pg_class c
            LEFT JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace
            WHERE c.relkind IN ('f', 'm', 'p', 'r', 'v')
                AND n.nspname NOT IN ('pg_catalog', 'pg_toast')
                AND pg_catalog.pg_table_is_visible(c.oid)
        ; args=None; alias=default
(0.250) SELECT "django_migrations"."id", "django_migrations"."app", "django_migrations"."name", "django_migrations"."applied" FROM "django_migrations"; args=(); alias=default        
(0.235) 
            SELECT
                c.relname,
                CASE
                    WHEN c.relispartition THEN 'p'
                    WHEN c.relkind IN ('m', 'v') THEN 'v'
                    ELSE 't'
                END
            FROM pg_catalog.pg_class c
            LEFT JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace
            WHERE c.relkind IN ('f', 'm', 'p', 'r', 'v')
                AND n.nspname NOT IN ('pg_catalog', 'pg_toast')
                AND pg_catalog.pg_table_is_visible(c.oid)
        ; args=None; alias=default
(0.343) SELECT "django_migrations"."id", "django_migrations"."app", "django_migrations"."name", "django_migrations"."applied" FROM "django_migrations"; args=(); alias=default        
Operations to perform:
  Apply all migrations: admin, auth, contenttypes, sessions, sites
Running migrations:
(0.281) 
            SELECT
                c.relname,
                CASE
                    WHEN c.relispartition THEN 'p'
                    WHEN c.relkind IN ('m', 'v') THEN 'v'
                    ELSE 't'
                END
            FROM pg_catalog.pg_class c
            LEFT JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace
            WHERE c.relkind IN ('f', 'm', 'p', 'r', 'v')
                AND n.nspname NOT IN ('pg_catalog', 'pg_toast')
                AND pg_catalog.pg_table_is_visible(c.oid)
        ; args=None; alias=default
  Applying sites.0008_remove_location_approved_remove_location_confidence_and_more...ALTER 
TABLE "Location" DROP COLUMN "approved" CASCADE; (params ())
(0.718) ALTER TABLE "Location" DROP COLUMN "approved" CASCADE; args=(); alias=default
ALTER TABLE "Location" DROP COLUMN "confidence" CASCADE; (params ())
(0.328) ALTER TABLE "Location" DROP COLUMN "confidence" CASCADE; args=(); alias=default
Traceback (most recent call last):
  File "C:\Users\User\AppData\Local\Programs\Python\Python310\lib\site-packages\django\db\backends\utils.py", line 89, in _execute
    return self.cursor.execute(sql, params)
psycopg2.errors.UndefinedColumn: column "confidence" of relation "Location" does not exist 

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "D:\projects\map\dataXProject\manage.py", line 22, in <module>
    main()
  File "D:\projects\map\dataXProject\manage.py", line 18, in main
    execute_from_command_line(sys.argv)
  File "C:\Users\User\AppData\Local\Programs\Python\Python310\lib\site-packages\django\core\management\__init__.py", line 446, in execute_from_command_line
    utility.execute()
  File "C:\Users\User\AppData\Local\Programs\Python\Python310\lib\site-packages\django\core\management\__init__.py", line 440, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "C:\Users\User\AppData\Local\Programs\Python\Python310\lib\site-packages\django\core\management\base.py", line 414, in run_from_argv
    self.execute(*args,**cmd_options)
  File "C:\Users\User\AppData\Local\Programs\Python\Python310\lib\site-packages\django\core\management\base.py", line 460, in execute
    output = self.handle(*args,**options)
  File "C:\Users\User\AppData\Local\Programs\Python\Python310\lib\site-packages\django\core\management\base.py", line 98, in wrapped
    res = handle_func(*args,**kwargs)
  File "C:\Users\User\AppData\Local\Programs\Python\Python310\lib\site-packages\django\core\management\commands\migrate.py", line 290, in handle
    post_migrate_state = executor.migrate(
  File "C:\Users\User\AppData\Local\Programs\Python\Python310\lib\site-packages\django\db\migrations\executor.py", line 131, in migrate
    state = self._migrate_all_forwards(
  File "C:\Users\User\AppData\Local\Programs\Python\Python310\lib\site-packages\django\db\migrations\executor.py", line 163, in _migrate_all_forwards
    state = self.apply_migration(
  File "C:\Users\User\AppData\Local\Programs\Python\Python310\lib\site-packages\django\db\migrations\executor.py", line 248, in apply_migration
    state = migration.apply(state, schema_editor)
  File "C:\Users\User\AppData\Local\Programs\Python\Python310\lib\site-packages\django\db\migrations\migration.py", line 131, in apply
    operation.database_forwards(
  File "C:\Users\User\AppData\Local\Programs\Python\Python310\lib\site-packages\django\db\migrations\operations\fields.py", line 170, in database_forwards
    schema_editor.remove_field(
  File "C:\Users\User\AppData\Local\Programs\Python\Python310\lib\site-packages\django\db\backends\base\schema.py", line 683, in remove_field
    self.execute(sql)
  File "C:\Users\User\AppData\Local\Programs\Python\Python310\lib\site-packages\django\db\backends\base\schema.py", line 192, in execute
    cursor.execute(sql, params)
  File "C:\Users\User\AppData\Local\Programs\Python\Python310\lib\site-packages\django\db\backends\utils.py", line 103, in execute
    return super().execute(sql, params)
  File "C:\Users\User\AppData\Local\Programs\Python\Python310\lib\site-packages\django\db\backends\utils.py", line 67, in execute
    return self._execute_with_wrappers(
  File "C:\Users\User\AppData\Local\Programs\Python\Python310\lib\site-packages\django\db\backends\utils.py", line 80, in _execute_with_wrappers
    return executor(sql, params, many, context)
  File "C:\Users\User\AppData\Local\Programs\Python\Python310\lib\site-packages\django\db\backends\utils.py", line 84, in _execute
    with self.db.wrap_database_errors:
  File "C:\Users\User\AppData\Local\Programs\Python\Python310\lib\site-packages\django\db\utils.py", line 91, in __exit__
    raise dj_exc_value.with_traceback(traceback) from exc_value
  File "C:\Users\User\AppData\Local\Programs\Python\Python310\lib\site-packages\django\db\backends\utils.py", line 89, in _execute
    return self.cursor.execute(sql, params)
django.db.utils.ProgrammingError: column "confidence" of relation "Location" does not exist
eagi6jfj

eagi6jfj1#

即使是在运行自定义SQL时,也应该尝试使用迁移。这样可以防止出现此类情况。
但是,如果更改已应用于数据库,则可以使用./manage.py migrate--fake标志跳过单个迁移
https://docs.djangoproject.com/en/4.1/ref/django-admin/#cmdoption-migrate-fake
如果没有此选项,可以使用直接SQL命令将名为confidence的列添加到Location表中。然后,迁移将删除此列,以使您与model数据库图形同步。

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