Django django.db.migrations.graph.CircularDependencyError

Question

我在迁移我的应用时遇到循环错误。 当我运行这个时：

(virEnv)abc@abc-All-Series:~/vissa_poc$ python manage.py migrate forms
**I get this:**

Traceback (most recent call last):
  File "manage.py", line 10, in <module>
    execute_from_command_line(sys.argv)
  File "/home/abc/virEnv/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 385, in execute_from_command_line
    utility.execute()
  File "/home/abc/virEnv/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 377, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/home/abc/virEnv/local/lib/python2.7/site-packages/django/core/management/base.py", line 288, in run_from_argv
    self.execute(*args, **options.__dict__)
  File "/home/abc/virEnv/local/lib/python2.7/site-packages/django/core/management/base.py", line 338, in execute
    output = self.handle(*args, **options)
  File "/home/abc/virEnv/local/lib/python2.7/site-packages/django/core/management/commands/migrate.py", line 106, in handle
    plan = executor.migration_plan(targets)
  File "/home/abc/virEnv/local/lib/python2.7/site-packages/django/db/migrations/executor.py", line 54, in migration_plan
    for migration in self.loader.graph.forwards_plan(target):
  File "/home/abc/virEnv/local/lib/python2.7/site-packages/django/db/migrations/graph.py", line 60, in forwards_plan
    return self.dfs(node, lambda x: self.dependencies.get(x, set()))
  File "/home/abc/virEnv/local/lib/python2.7/site-packages/django/db/migrations/graph.py", line 124, in dfs
    self.ensure_not_cyclic(start, get_children)
  File "/home/abc/virEnv/local/lib/python2.7/site-packages/django/db/migrations/graph.py", line 112, in ensure_not_cyclic
    raise CircularDependencyError(", ".join("%s.%s" % n for n in cycle))
django.db.migrations.graph.CircularDependencyError: vissa.0001_initial, forms.0001_initial

Answer 1

我可能会建议您尝试使用带有“通过”选项的 ManyToMany 字段。

要修复它，您需要执行以下操作：

1. 在整行使用 ManyToMany+through 时，将 # 放在行首来注释
2. makemigrations of_all_apps_you_need（也是 p1 行存在的那个）
3. 从 p1 取消注释该行
4. makemigrations the_app_where_the_line_from_p1_exist
5. 迁移