django - 我如何修复 django.db.utils.DatabaseError

Question

如何修复 Django 数据库错误。我将 MongoDB 与 Djongo 结合使用。

直到最近我决定添加 NewApp 时，一切都运行良好。每当我尝试迁移时，它都会用 django.db.utils.DatabaseError 向我致意。

我尝试手动重置数据库以及从终端重置数据库，但没有成功。

我认为它非常简单，但我是 Django 的新手，MongoDB 似乎无法弄清楚如何修复它，我们将不胜感激任何帮助。

这是错误的样子。

Not implemented alter command for SQL ALTER TABLE "articles_article" ADD COLUMN "author_id" int NOT NULL
  Applying articles.0002_article_author...Traceback (most recent call last):
  File "/Users/username/opt/anaconda3/envs/restApi/lib/python3.8/site-packages/djongo/cursor.py", line 51, in execute
    self.result = Query(
  File "/Users/username/opt/anaconda3/envs/restApi/lib/python3.8/site-packages/djongo/sql2mongo/query.py", line 783, in __init__
    self._query = self.parse()
  File "/Users/username/opt/anaconda3/envs/restApi/lib/python3.8/site-packages/djongo/sql2mongo/query.py", line 875, in parse
    raise e
  File "/Users/username/opt/anaconda3/envs/restApi/lib/python3.8/site-packages/djongo/sql2mongo/query.py", line 856, in parse
    return handler(self, statement)
  File "/Users/username/opt/anaconda3/envs/restApi/lib/python3.8/site-packages/djongo/sql2mongo/query.py", line 888, in _alter
    query = AlterQuery(self.db, self.connection_properties, sm, self._params)
  File "/Users/username/opt/anaconda3/envs/restApi/lib/python3.8/site-packages/djongo/sql2mongo/query.py", line 425, in __init__
    super().__init__(*args)
  File "/Users/username/opt/anaconda3/envs/restApi/lib/python3.8/site-packages/djongo/sql2mongo/query.py", line 84, in __init__
    super().__init__(*args)
  File "/Users/username/opt/anaconda3/envs/restApi/lib/python3.8/site-packages/djongo/sql2mongo/query.py", line 62, in __init__
    self.parse()
  File "/Users/username/opt/anaconda3/envs/restApi/lib/python3.8/site-packages/djongo/sql2mongo/query.py", line 435, in parse
    self._add(statement)
  File "/Users/username/opt/anaconda3/envs/restApi/lib/python3.8/site-packages/djongo/sql2mongo/query.py", line 598, in _add
    raise SQLDecodeError(err_key=tok.value,
djongo.exceptions.SQLDecodeError: 

    Keyword: int
    Sub SQL: ALTER TABLE "articles_article" ADD COLUMN "author_id" int NOT NULL
    FAILED SQL: ('ALTER TABLE "articles_article" ADD COLUMN "author_id" int NOT NULL',)
    Params: ([],)
    Version: 1.3.3

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

Traceback (most recent call last):
  File "/Users/username/opt/anaconda3/envs/restApi/lib/python3.8/site-packages/django/db/backends/utils.py", line 86, in _execute
    return self.cursor.execute(sql, params)
  File "/Users/username/opt/anaconda3/envs/restApi/lib/python3.8/site-packages/djongo/cursor.py", line 59, in execute
    raise db_exe from e
djongo.database.DatabaseError

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

Traceback (most recent call last):
  File "manage.py", line 21, in <module>
    main()
  File "manage.py", line 17, in main
    execute_from_command_line(sys.argv)
  File "/Users/username/opt/anaconda3/envs/restApi/lib/python3.8/site-packages/django/core/management/__init__.py", line 401, in execute_from_command_line
    utility.execute()
  File "/Users/username/opt/anaconda3/envs/restApi/lib/python3.8/site-packages/django/core/management/__init__.py", line 395, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/Users/username/opt/anaconda3/envs/restApi/lib/python3.8/site-packages/django/core/management/base.py", line 328, in run_from_argv
    self.execute(*args, **cmd_options)
  File "/Users/username/opt/anaconda3/envs/restApi/lib/python3.8/site-packages/django/core/management/base.py", line 369, in execute
    output = self.handle(*args, **options)
  File "/Users/username/opt/anaconda3/envs/restApi/lib/python3.8/site-packages/django/core/management/base.py", line 83, in wrapped
    res = handle_func(*args, **kwargs)
  File "/Users/username/opt/anaconda3/envs/restApi/lib/python3.8/site-packages/django/core/management/commands/migrate.py", line 231, in handle
    post_migrate_state = executor.migrate(
  File "/Users/username/opt/anaconda3/envs/restApi/lib/python3.8/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 "/Users/username/opt/anaconda3/envs/restApi/lib/python3.8/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 "/Users/username/opt/anaconda3/envs/restApi/lib/python3.8/site-packages/django/db/migrations/executor.py", line 245, in apply_migration
    state = migration.apply(state, schema_editor)
  File "/Users/username/opt/anaconda3/envs/restApi/lib/python3.8/site-packages/django/db/migrations/migration.py", line 124, in apply
    operation.database_forwards(self.app_label, schema_editor, old_state, project_state)
  File "/Users/username/opt/anaconda3/envs/restApi/lib/python3.8/site-packages/django/db/migrations/operations/fields.py", line 110, in database_forwards
    schema_editor.add_field(
  File "/Users/username/opt/anaconda3/envs/restApi/lib/python3.8/site-packages/django/db/backends/base/schema.py", line 480, in add_field
    self.execute(sql, params)
  File "/Users/username/opt/anaconda3/envs/restApi/lib/python3.8/site-packages/django/db/backends/base/schema.py", line 142, in execute
    cursor.execute(sql, params)
  File "/Users/username/opt/anaconda3/envs/restApi/lib/python3.8/site-packages/django/db/backends/utils.py", line 100, in execute
    return super().execute(sql, params)
  File "/Users/username/opt/anaconda3/envs/restApi/lib/python3.8/site-packages/django/db/backends/utils.py", line 68, in execute
    return self._execute_with_wrappers(sql, params, many=False, executor=self._execute)
  File "/Users/username/opt/anaconda3/envs/restApi/lib/python3.8/site-packages/django/db/backends/utils.py", line 77, in _execute_with_wrappers
    return executor(sql, params, many, context)
  File "/Users/username/opt/anaconda3/envs/restApi/lib/python3.8/site-packages/django/db/backends/utils.py", line 86, in _execute
    return self.cursor.execute(sql, params)
  File "/Users/username/opt/anaconda3/envs/restApi/lib/python3.8/site-packages/django/db/utils.py", line 90, in __exit__
    raise dj_exc_value.with_traceback(traceback) from exc_value
  File "/Users/username/opt/anaconda3/envs/restApi/lib/python3.8/site-packages/django/db/backends/utils.py", line 86, in _execute
    return self.cursor.execute(sql, params)
  File "/Users/username/opt/anaconda3/envs/restApi/lib/python3.8/site-packages/djongo/cursor.py", line 59, in execute
    raise db_exe from e
django.db.utils.DatabaseError

感谢您的宝贵时间。

Answer 1

您好，这种情况经常发生。以下是通过三个简单步骤完成的操作

1. 转到您应用的迁移目录

2. 删除 0001_initial.py 或 allnumbers_initial.py

3. 运行 makemigrations 并再次迁移。您的问题一定会得到解决。