进行模型更改时，Django 依赖项引用不存在的父节点

Posted 2023-02-24

【中文标题】进行模型更改时，Django 依赖项引用不存在的父节点

【英文标题】：Django dependencies reference nonexistent parent node when making model changes

【发布时间】：2019-12-17 06:24:24

【问题描述】：

我在 aws 服务器上部署了一个 Django 项目。我在我的机器上对模型进行了一些更改，并通过 Github 推送了更改，在服务器上，我通过 git 命令提取了更改，但应用程序无法正常工作，所以当我尝试运行 python manage.py makemigrations 它返回错误

类似于 Django：依赖项引用不存在的父节点

我尝试删除错误中提到的文件并尝试删除 .pyc 文件，但仍然是同样的问题，所以我可以在这里做什么以及将来应该如何做以避免这些问题。

这是回溯

Traceback (most recent call last):
  File "manage.py", line 15, in <module>
    execute_from_command_line(sys.argv)
  File "/home/ubuntu/Eyelizer/eyenv/lib/python3.6/site-packages/django/core/management/__init__.py", line 381, in execute_from_command_line
    utility.execute()
  File "/home/ubuntu/Eyelizer/eyenv/lib/python3.6/site-packages/django/core/management/__init__.py", line 375, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/home/ubuntu/Eyelizer/eyenv/lib/python3.6/site-packages/django/core/management/base.py", line 316, in run_from_argv
    self.execute(*args, **cmd_options)
  File "/home/ubuntu/Eyelizer/eyenv/lib/python3.6/site-packages/django/core/management/base.py", line 353, in execute
    output = self.handle(*args, **options)
  File "/home/ubuntu/Eyelizer/eyenv/lib/python3.6/site-packages/django/core/management/base.py", line 83, in wrapped
    res = handle_func(*args, **kwargs)
  File "/home/ubuntu/Eyelizer/eyenv/lib/python3.6/site-packages/django/core/management/commands/makemigrations.py", line 89, in handle
    loader = MigrationLoader(None, ignore_no_migrations=True)
  File "/home/ubuntu/Eyelizer/eyenv/lib/python3.6/site-packages/django/db/migrations/loader.py", line 49, in __init__
    self.build_graph()
  File "/home/ubuntu/Eyelizer/eyenv/lib/python3.6/site-packages/django/db/migrations/loader.py", line 273, in build_graph
    raise exc
  File "/home/ubuntu/Eyelizer/eyenv/lib/python3.6/site-packages/django/db/migrations/loader.py", line 247, in build_graph
    self.graph.validate_consistency()
  File "/home/ubuntu/Eyelizer/eyenv/lib/python3.6/site-packages/django/db/migrations/graph.py", line 243, in validate_consistency
    [n.raise_error() for n in self.node_map.values() if isinstance(n, DummyNode)]
  File "/home/ubuntu/Eyelizer/eyenv/lib/python3.6/site-packages/django/db/migrations/graph.py", line 243, in <listcomp>
    [n.raise_error() for n in self.node_map.values() if isinstance(n, DummyNode)]
  File "/home/ubuntu/Eyelizer/eyenv/lib/python3.6/site-packages/django/db/migrations/graph.py", line 96, in raise_error
    raise NodeNotFoundError(self.error_message, self.key, origin=self.origin)
django.db.migrations.exceptions.NodeNotFoundError: Migration patients.0007_uploadedimages_processed_image dependencies reference nonexistent parent node ('patients', '0006_auto_20190803_2241')

更新：不是整个应用程序无法运行，而是新/更改模型的视图返回 500 内部服务器错误。

【问题讨论】：

您似乎忘记了添加、提交和推送较旧的迁移文件：0006_auto_20190803_2241

我发现从 0001 到 0006 丢失了你建议如何添加这些？我应该添加所有这些吗？

【参考方案1】：

我必须手动复制每个依赖项并粘贴其内容。从 0001 到 0006。