无法创建 django_migrations 表（ORA-02000：缺少 ALWAYS 关键字）

Question

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，出现错误 django.db.migrations.exceptions.MigrationSchemaMissing: Unable to create the django_migrations table ( 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stackoverflow中其他问题中描述的版本问题，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，我认为它是框架的表。有人知道如何解决这个问题吗？

Answer 1

添加中的版本问题this.py：

print(sql)
return self.cursor.execute(sql)

然后运行：

python manage.py migrate

你可以看到问题所在。而Django使用Oracle创建表，'GENERATED BY DEFAULT ON NULL' 这是Oracle的12c新特性。所以你可以将Oracle更改为12c或更改ox_oracle版本。