Django 服务器不会运行: 此站点无法访问 127.0.0.1 拒绝连接

Question

我正在尝试为我的 CS50W 项目 2：Commerce 创建一个拍卖网站。当我尝试运行 python3 manage.py runserver 时。有6个错误。我得到系统识别出 6 个错误：

System check identified 6 issues (0 silenced).
Exception in thread django-main-thread:
Traceback (most recent call last):
  File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/threading.py", line 1009, in _bootstrap_inner
    self.run()
  File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/threading.py", line 946, in run
    self._target(*self._args, **self._kwargs)
  File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/django/utils/autoreload.py", line 64, in wrapper
    fn(*args, **kwargs)
  File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/django/core/management/commands/runserver.py", line 121, in inner_run
    self.check_migrations()
  File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/django/core/management/base.py", line 486, in check_migrations
    executor = MigrationExecutor(connections[DEFAULT_DB_ALIAS])
  File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/django/db/migrations/executor.py", line 18, in __init__
    self.loader = MigrationLoader(self.connection)
  File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/django/db/migrations/loader.py", line 53, in __init__
    self.build_graph()
  File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/django/db/migrations/loader.py", line 259, in build_graph
    self.graph.validate_consistency()
  File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/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 "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/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 "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/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 auctions.0003_auto_20201114_0509 dependencies reference nonexistent parent node ('auctions', '0002_listing')

请帮忙

Answer 1

看起来你搞砸了迁移（可能删除了一个已经应用的迁移）。

如果您的数据库中实际上没有任何重要数据，并且您可以重新创建一个数据库，我会推荐下一个：

Drop/create 你的数据库。
删除所有迁移文件（在每个应用程序内的 migrations 目录中）
重新创建迁移python manage.py makemigrations
应用迁移python manage.py migrate

Django 服务器不会运行: 此站点无法访问 127.0.0.1 拒绝连接

Django server won't run: This site can’t be reached127.0.0.1 refused to connect

python

django

commerce

web-development-server

cs50

Django 服务器不会 运行: 此站点无法访问 127.0.0.1 拒绝连接

Django server won't run: This site can’t be reached127.0.0.1 refused to connect

python

django

commerce

web-development-server

cs50

Django 服务器不会运行: 此站点无法访问 127.0.0.1 拒绝连接