无法创建 django_migrations 表(ORA-02000:缺少 ALWAYS 关键字)
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【中文标题】无法创建 django_migrations 表(ORA-02000:缺少 ALWAYS 关键字)【英文标题】:Unable to create the django_migrations table (ORA-02000: missing ALWAYS keyword) 【发布时间】:2018-06-23 13:21:23 【问题描述】:我正在使用数据库 Oracle 11g 在 Django-2.0.1 中启动一个项目,当我运行 $python manage.py migrate 时,我收到错误 django.db.migrations.exceptions.MigrationSchemaMissing: Unable to create the django_migrations 表(ORA-02000:缺少 ALWAYS 关键字)。您可以在下面看到完整的堆栈:
Traceback (most recent call last):
File "/Users/user/anaconda3/lib/python3.6/site-packages/django/db/backends/utils.py", line 83, in _execute
return self.cursor.execute(sql)
File "/Users/user/anaconda3/lib/python3.6/site-packages/django/db/backends/oracle/base.py", line 500, in execute
return self.cursor.execute(query, self._param_generator(params))
cx_Oracle.DatabaseError: ORA-02000: missing ALWAYS keyword
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "/Users/user/anaconda3/lib/python3.6/site-packages/django/db/migrations/recorder.py", line 55, in ensure_schema
editor.create_model(self.Migration)
File "/Users/user/anaconda3/lib/python3.6/site-packages/django/db/backends/base/schema.py", line 298, in create_model
self.execute(sql, params or None)
File "/Users/user/anaconda3/lib/python3.6/site-packages/django/db/backends/base/schema.py", line 117, in execute
cursor.execute(sql, params)
File "/Users/user/anaconda3/lib/python3.6/site-packages/django/db/backends/utils.py", line 100, in execute
return super().execute(sql, params)
File "/Users/user/anaconda3/lib/python3.6/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/user/anaconda3/lib/python3.6/site-packages/django/db/backends/utils.py", line 77, in _execute_with_wrappers
return executor(sql, params, many, context)
File "/Users/user/anaconda3/lib/python3.6/site-packages/django/db/backends/utils.py", line 85, in _execute
return self.cursor.execute(sql, params)
File "/Users/user/anaconda3/lib/python3.6/site-packages/django/db/utils.py", line 89, in __exit__
raise dj_exc_value.with_traceback(traceback) from exc_value
File "/Users/user/anaconda3/lib/python3.6/site-packages/django/db/backends/utils.py", line 83, in _execute
return self.cursor.execute(sql)
File "/Users/user/anaconda3/lib/python3.6/site-packages/django/db/backends/oracle/base.py", line 500, in execute
return self.cursor.execute(query, self._param_generator(params))
django.db.utils.DatabaseError: ORA-02000: missing ALWAYS keyword
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "manage.py", line 15, in <module>
execute_from_command_line(sys.argv)
File "/Users/user/anaconda3/lib/python3.6/site-packages/django/core/management/__init__.py", line 371, in execute_from_command_line
utility.execute()
File "/Users/user/anaconda3/lib/python3.6/site-packages/django/core/management/__init__.py", line 365, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/Users/user/anaconda3/lib/python3.6/site-packages/django/core/management/base.py", line 288, in run_from_argv
self.execute(*args, **cmd_options)
File "/Users/user/anaconda3/lib/python3.6/site-packages/django/core/management/base.py", line 335, in execute
output = self.handle(*args, **options)
File "/Users/user/anaconda3/lib/python3.6/site-packages/django/core/management/commands/migrate.py", line 200, in handle
fake_initial=fake_initial,
File "/Users/user/anaconda3/lib/python3.6/site-packages/django/db/migrations/executor.py", line 91, in migrate
self.recorder.ensure_schema()
File "/Users/user/anaconda3/lib/python3.6/site-packages/django/db/migrations/recorder.py", line 57, in ensure_schema
raise MigrationSchemaMissing("Unable to create the django_migrations table (%s)" % exc)
django.db.migrations.exceptions.MigrationSchemaMissing: Unable to create the django_migrations table (ORA-02000: missing ALWAYS keyword)
这似乎是一个版本问题,如*** 中其他questions 中所述,但我不知道如何编辑用于创建django_migrations 的脚本。我在迁移中没有找到它,我认为它是框架的一个表。有人知道如何解决这个问题吗?
【问题讨论】:
ORA-02000 是 Oracle 错误代码。但是,您的消息中没有 Oracle 代码。可以发一下吗? @Littlefoot 这确实是我的问题的一部分,这个 SQL 代码是由 django-migrations 框架生成的 ORM 框架,我知道如何访问我创建的模型和其他模型的 sql 代码apps 但是这个 django_migrations 表似乎是框架自己生成的,我不知道如何查看这个 SQL 代码。 您是使用 Oracle 作为您的“默认”还是仅作为数据库后端?并且您正在访问它的用户帐户是否具有创建权限?这看起来与我试图在自己的项目中解决的问题非常相似,但就我而言,我知道我有一个只读数据库,并且迁移(和测试)都调用 CREATE TABLE 作为其设置操作的一部分. 嗨,卡尔。我改用 postgre 数据库来解决这个问题,当时我使用 Oracle 作为我唯一的数据库。 【参考方案1】:我在迁移过程中遇到了同样的问题。我将 Django 版本降级为 1.1 并更改了 base.py 中的一些代码用于 Oracle 数据库,如 a link 中给出的,现在工作正常。
【讨论】:
【参考方案2】:版本问题
在this.py
添加:
print(sql)
return self.cursor.execute(sql)
然后运行:
python manage.py migrate
你可以看到问题。而 Django 创建一个 Oracle 表使用 'GENERATED BY DEFAULT ON NULL'
即 Oracle 12c
新特性。所以你可以把Oracle改成12c
或者改ox_oracle
版本。
【讨论】:
你能帮忙看看在哪里可以找到 this.py 文件吗? 我在任何地方都找不到this.py以上是关于无法创建 django_migrations 表(ORA-02000:缺少 ALWAYS 关键字)的主要内容,如果未能解决你的问题,请参考以下文章
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