我如何修复 django.db.utils.DatabaseError答案

【问题标题】：How do i Fix django.db.utils.DatabaseError我如何修复 django.db.utils.DatabaseError
【发布时间】：2021-01-26 02:59:24
【问题描述】：

如何修复 Django 数据库错误。我正在将 MongoDB 与 Djongo 一起使用。

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，它都会以 django.db.utils.DatabaseError 迎接我。

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。

我认为它超级简单，但是对于 Django 和 MongoDB 来说，我是新手，似乎无法弄清楚如何解决它，任何帮助将不胜感激。

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。

【问题讨论】：

您好，我也有同样的问题。你修好了吗？
我做了一个假迁移来完成这项工作，但不认为这是一个正确的解决方案。
哦，我也是，我做了一个假迁移。我认为它是正确的，但是......

标签： django database mongodb djongo

【解决方案1】：

我也遇到了同样的错误，如果其他提到的方法都不起作用，那么可能是你的 sqlparse 版本错误。我的是 0.4.1，这不适用于某些地区。您必须拥有 0.2.4 版本。

pip install sqlparse==0.2.4

【讨论】：

【解决方案2】：

这也发生在我身上。我通过将 Django 从 2.1.7 升级到 3.1.7、删除迁移文件并再次运行 makemigrations 解决了这个问题。然后，当我迁移时，没有更多的错误。显然 Django 2.1.7 生成的迁移文件与 3.1.7 不同。

编辑：如果您在使用“过滤器”进行查询时遇到同样的错误，请尝试将您的 Django 版本降级到 3.0.5。

【讨论】：

扎凡你知道做线程化cmets系统吗？
对不起@orynnnnn 我不熟悉。

【解决方案3】：

您好，这种情况经常发生。以下是只需三个简单步骤即可完成的操作

转到您应用的迁移目录
删除 0001_initial.py 或 allnumbers_initial.py
运行 makemigrations 并再次迁移。你的问题一定会解决的。

【讨论】：

【解决方案4】：

pip install sqlparse ==0.2.4
转到迁移目录
删除0001_initial.py
python manage.py makemigrations
python manage.py migrate
python manage.py runserver
您将能够登录：http://127.0.0.1:8000/login/

【讨论】：