在postgresql数据库上运行迁移正在尝试迁移已迁移的迁移

Question

我最近为我的django项目从sqlite升级到postgresql。

在过去，每当我对模型进行更改时，我只会运行makemigrations，然后运行migrate命令。没有问题。

现在，使用posgresql，当我进行初始的makemigrations/migrate时，它像往常一样工作得很好，但如果我对一个模型进行了更改，然后运行makemigrations，然后运行迁移，在' migrate‘命令下，系统会再次尝试应用初始迁移，并返回一个错误，说明表已经存在(它确实存在)。

如何在系统不尝试重新迁移已迁移的迁移的情况下运行迁移？

谢谢!

Traceback (most recent call last):
  File "manage.py", line 15, in <module>
    execute_from_command_line(sys.argv)
  File "/home/jimmy/lib/python3.6/django/core/management/__init__.py", line 401, in execute_from_command_line
    utility.execute()
  File "/home/jimmy/lib/python3.6/django/core/management/__init__.py", line 395, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/home/jimmy/lib/python3.6/django/core/management/base.py", line 328, in run_from_argv
    self.execute(*args, **cmd_options)
  File "/home/jimmy/lib/python3.6/django/core/management/base.py", line 369, in execute
    output = self.handle(*args, **options)
  File "/home/jimmy/lib/python3.6/django/core/management/base.py", line 83, in wrapped
    res = handle_func(*args, **kwargs)
  File "/home/jimmy/lib/python3.6/django/core/management/commands/migrate.py", line 233, in handle
    fake_initial=fake_initial,
  File "/home/jimmy/lib/python3.6/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 "/home/jimmy/lib/python3.6/django/db/migrations/executor.py", line 147, in _migrate_all_forwards
    state = self.apply_migration(state, migration, fake=fake, fake_initial=fake_initial)
  File "/home/jimmy/lib/python3.6/django/db/migrations/executor.py", line 245, in apply_migration
    state = migration.apply(state, schema_editor)
  File "/home/jimmy/lib/python3.6/django/db/migrations/migration.py", line 124, in apply
    operation.database_forwards(self.app_label, schema_editor, old_state, project_state)
  File "/home/jimmy/lib/python3.6/django/db/migrations/operations/models.py", line 92, in database_forwards
    schema_editor.create_model(model)
  File "/home/jimmy/lib/python3.6/django/db/backends/base/schema.py", line 324, in create_model
    self.execute(sql, params or None)
  File "/home/jimmy/lib/python3.6/django/db/backends/base/schema.py", line 142, in execute
    cursor.execute(sql, params)
  File "/home/jimmy/lib/python3.6/django/db/backends/utils.py", line 68, in execute
    return self._execute_with_wrappers(sql, params, many=False, executor=self._execute)
  File "/home/jimmy/lib/python3.6/django/db/backends/utils.py", line 77, in _execute_with_wrappers
    return executor(sql, params, many, context)
  File "/home/jimmy/lib/python3.6/django/db/backends/utils.py", line 86, in _execute
    return self.cursor.execute(sql, params)
  File "/home/jimmy/lib/python3.6/django/db/utils.py", line 90, in __exit__
    raise dj_exc_value.with_traceback(traceback) from exc_value
  File "/home/jimmy/lib/python3.6/django/db/backends/utils.py", line 84, in _execute
    return self.cursor.execute(sql)
django.db.utils.ProgrammingError: relation "profiles_accentcolor" already exists

Answer 1

看起来我必须运行python manage.py migrate --fake-initial来忽略初始迁移。