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删除迁移文件并获取 django.db.migrations.exceptions.NodeNotFoundError：

[英]Deleting Migration Files and Getting django.db.migrations.exceptions.NodeNotFoundError:

 原文  2020-12-06 20:33:48  5   1    python/ django

问题描述

I have deleted all of migration files and now I am trying to $ python manage.py makemigrations but it is returning django.db.migrations.exceptions.NodeNotFoundError: Migration notifications.0001_initial dependencies reference nonexistent parent node ('blog', '0012_auto_20201118_22 55')我已经删除了所有迁移文件，现在我正在尝试$ python manage.py makemigrations但它正在返回django.db.migrations.exceptions.NodeNotFoundError: Migration notifications.0001_initial dependencies reference nonexistent parent node ('blog', '0012_auto_20201118_22 55')

How should I fix this error and start migrating from the beginning?我应该如何修复此错误并从头开始迁移？ The reason for deleting the migration files is due to removing a function that kept returning an error due one of the migration files so I decided to start clean with them.删除迁移文件的原因是由于删除了一个 function，它由于其中一个迁移文件而不断返回错误，所以我决定开始清理它们。

Any ideas on what step I should take to start migrations and migrate again?关于我应该采取什么步骤来开始迁移和再次迁移的任何想法？

1 个解决方案

解决方案1
 2 已采纳  2020-12-06 20:59:04

It looks like your notifications app references model(s) within your blog app, which means that it has migration files that are dependent on blog .看起来您的notifications应用程序在您的blog应用程序中引用了模型，这意味着它具有依赖于blog的迁移文件。

To fix this you will need to clear the migrations for all of your apps, and delete your database.要解决此问题，您需要清除所有应用程序的迁移，并删除您的数据库。
It's also a good idea to delete your __pycache__ folders (they have caused migration issues for me in the past).删除你的__pycache__文件夹也是一个好主意（它们在过去给我带来了迁移问题）。

If you are using a unix-like command line, you can do this easily with the following:如果您使用的是类 unix命令行，则可以使用以下命令轻松完成此操作：

find . -path "*/migrations/*.py" -not -path "*/site-packages/*" -delete
find . -type d -name "__pycache__" -exec rm -rf {} +

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