我的项目中没有名为“帐户”的应用程序，但 django 仍然抛出 django.db.migrations.exceptions.NodeNotFoundError

Question

Traceback:

File "manage.py", line 17, in main
    execute_from_command_line(sys.argv)
  File "D:\Anaconda\lib\site-packages\django\core\management\__init__.py", line 401, in execute_from_command_line
    utility.execute()
  File "D:\Anaconda\lib\site-packages\django\core\management\__init__.py", line 395, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "D:\Anaconda\lib\site-packages\django\core\management\base.py", line 328, in run_from_argv
    self.execute(*args, **cmd_options)
  File "D:\Anaconda\lib\site-packages\django\core\management\base.py", line 369, in execute
    output = self.handle(*args, **options)
  File "D:\Anaconda\lib\site-packages\django\core\management\base.py", line 83, in wrapped
    res = handle_func(*args, **kwargs)
  File "D:\Anaconda\lib\site-packages\django\core\management\commands\makemigrations.py", line 87, in handle
    loader = MigrationLoader(None, ignore_no_migrations=True)
  File "D:\Anaconda\lib\site-packages\django\db\migrations\loader.py", line 49, in __init__
    self.build_graph()
  File "D:\Anaconda\lib\site-packages\django\db\migrations\loader.py", line 274, in build_graph
    raise exc
  File "D:\Anaconda\lib\site-packages\django\db\migrations\loader.py", line 248, in build_graph
    self.graph.validate_consistency()
  File "D:\Anaconda\lib\site-packages\django\db\migrations\graph.py", line 195, in validate_consistency
    [n.raise_error() for n in self.node_map.values() if isinstance(n, DummyNode)]
  File "D:\Anaconda\lib\site-packages\django\db\migrations\graph.py", line 195, in <listcomp>
    [n.raise_error() for n in self.node_map.values() if isinstance(n, DummyNode)]
  File "D:\Anaconda\lib\site-packages\django\db\migrations\graph.py", line 58, in raise_error
    raise NodeNotFoundError(self.error_message, self.key, origin=self.origin)
django.db.migrations.exceptions.NodeNotFoundError: Migration auth.0012_user_following dependencies reference nonexistent parent node ('account', '0002_contact')

pip freeze txt file link:

https://github.com/shyamparmar29/pip-freeze/blob/master/freeze.docx

There's no app named account in my project but i am still getting this error. I have tried to delete all pycache and migration files but it is not helping.

I even tried to run the project in a virtual environment but i am still getting this error.

Please help.

Answer 1

do these steps:

1- delete migrations folder in each app

2- delete database tables or simply delete it completely

3- run./manage.py makemigrations appname for each app

4- run./manage.py migrate

5- finally run the server and see what happens

if it does not work again see this .

edit: delete your DB and run

python manage.py migrate --fake auth zero

then make migrations again.

Answer 2

You can try the following specific operations as follows:

1. Delete through the query path under the local python3.8 file:

   https://i.stack.imgur.com/FMe2r.png ( reference )

2. Delete the migration file that is determined to be wrong, here is the last file starting with 0012.

3. Re-execute python3 manage.py makemigrations after deleting

4. Execute python3 manage.py migrate

At this point, the migration operation should be normal.

Note: You can also search and delete through the library under the pycharm project, the path is the same as above. It is easy to find and operate.