尝试运行服务器时无法迁移或进行迁移答案

【问题标题】：Can't migrate or makemigrations while trying to runserver尝试运行服务器时无法迁移或进行迁移
【发布时间】：2022-01-22 12:34:47
【问题描述】：

Traceback (most recent call last):
  File "manage.py", line 22, in <module>
    main()
  File "manage.py", line 18, in main
    execute_from_command_line(sys.argv)
  File "/home/apple/sanskar_handicrafts/env/lib/python3.8/site-packages/django/core/management/__init__.py", line 425, in execute_from_command_line
    utility.execute()
  File "/home/apple/sanskar_handicrafts/env/lib/python3.8/site-packages/django/core/management/__init__.py", line 419, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/home/apple/sanskar_handicrafts/env/lib/python3.8/site-packages/django/core/management/base.py", line 373, in run_from_argv
    self.execute(*args, **cmd_options)
  File "/home/apple/sanskar_handicrafts/env/lib/python3.8/site-packages/django/core/management/base.py", line 412, in execute
    self.check()
  File "/home/apple/sanskar_handicrafts/env/lib/python3.8/site-packages/django/core/management/base.py", line 438, in check
    all_issues = checks.run_checks(
  File "/home/apple/sanskar_handicrafts/env/lib/python3.8/site-packages/django/core/checks/registry.py", line 77, in run_checks
    new_errors = check(app_configs=app_configs, databases=databases)
  File "/home/apple/sanskar_handicrafts/env/lib/python3.8/site-packages/django/core/checks/urls.py", line 13, in check_url_config
    return check_resolver(resolver)
  File "/home/apple/sanskar_handicrafts/env/lib/python3.8/site-packages/django/core/checks/urls.py", line 23, in check_resolver
    return check_method()
  File "/home/apple/sanskar_handicrafts/env/lib/python3.8/site-packages/django/urls/resolvers.py", line 446, in check
    for pattern in self.url_patterns:
  File "/home/apple/sanskar_handicrafts/env/lib/python3.8/site-packages/django/utils/functional.py", line 48, in __get__
    res = instance.__dict__[self.name] = self.func(instance)
  File "/home/apple/sanskar_handicrafts/env/lib/python3.8/site-packages/django/urls/resolvers.py", line 632, in url_patterns
    patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module)
  File "/home/apple/sanskar_handicrafts/env/lib/python3.8/site-packages/django/utils/functional.py", line 48, in __get__
    res = instance.__dict__[self.name] = self.func(instance)
  File "/home/apple/sanskar_handicrafts/env/lib/python3.8/site-packages/django/urls/resolvers.py", line 625, in urlconf_module
    return import_module(self.urlconf_name)
  File "/usr/lib/python3.8/importlib/__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
  File "<frozen importlib._bootstrap>", line 991, in _find_and_load
  File "<frozen importlib._bootstrap>", line 975, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 671, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 848, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/home/apple/sanskar_handicrafts/sanskar_handicrafts/urls.py", line 23, in <module>     
    path('', include('website.urls')),
  File "/home/apple/sanskar_handicrafts/env/lib/python3.8/site-packages/django/urls/conf.py", line 34, in include
    urlconf_module = import_module(urlconf_module)
  File "/usr/lib/python3.8/importlib/__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
  File "<frozen importlib._bootstrap>", line 991, in _find_and_load
  File "<frozen importlib._bootstrap>", line 975, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 671, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 848, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/home/apple/sanskar_handicrafts/website/urls.py", line 2, in <module>
    from . import views
  File "/home/apple/sanskar_handicrafts/website/views.py", line 12, in <module>
    for image in g_images:
  File "/home/apple/sanskar_handicrafts/env/lib/python3.8/site-packages/django/db/models/query.py", line 280, in __iter__
    self._fetch_all()
  File "/home/apple/sanskar_handicrafts/env/lib/python3.8/site-packages/django/db/models/query.py", line 1354, in _fetch_all
    self._result_cache = list(self._iterable_class(self))
  File "/home/apple/sanskar_handicrafts/env/lib/python3.8/site-packages/django/db/models/query.py", line 51, in __iter__
    results = compiler.execute_sql(chunked_fetch=self.chunked_fetch, chunk_size=self.chunk_size)
  File "/home/apple/sanskar_handicrafts/env/lib/python3.8/site-packages/django/db/models/sql/compiler.py", line 1202, in execute_sql
    cursor.execute(sql, params)
  File "/home/apple/sanskar_handicrafts/env/lib/python3.8/site-packages/django/db/backends/utils.py", line 99, in execute
    return super().execute(sql, params)
  File "/home/apple/sanskar_handicrafts/env/lib/python3.8/site-packages/django/db/backends/utils.py", line 67, in execute
    return self._execute_with_wrappers(sql, params, many=False, executor=self._execute)        
  File "/home/apple/sanskar_handicrafts/env/lib/python3.8/site-packages/django/db/backends/utils.py", line 76, in _execute_with_wrappers
    return executor(sql, params, many, context)
  File "/home/apple/sanskar_handicrafts/env/lib/python3.8/site-packages/django/db/backends/utils.py", line 85, in _execute
    return self.cursor.execute(sql, params)
  File "/home/apple/sanskar_handicrafts/env/lib/python3.8/site-packages/django/db/utils.py", line 90, in __exit__
    raise dj_exc_value.with_traceback(traceback) from exc_value
  File "/home/apple/sanskar_handicrafts/env/lib/python3.8/site-packages/django/db/backends/utils.py", line 85, in _execute
    return self.cursor.execute(sql, params)
django.db.utils.ProgrammingError: relation "website_gallery" does not exist
LINE 1: ...bsite_gallery"."id", "website_gallery"."img" FROM "website_g...

是我每次尝试时都会遇到的错误 runserver、makemigrations 或 migrate。此外，当我为任何表运行 SELECT * FROM table_name 时，它告诉我它不存在。

我一直在关注这个tutorial 还有这个guide

堆栈溢出并没有真正让我发布这个，因为我的帖子是“代码太多”所以 aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa

【问题讨论】：

您是在 Droplet 上还是在笔记本电脑上进行远程开发？如果是后者：在将新提交推送到 GitHub 存储库后，您是否在 droplet 上发布了git pull？
@Dauros 我通过 VS 代码开发，当我使用 git pull 这就是它告诉我的内容 git pull <remote> <branch> 我不确定要为填写什么
那么如何将编辑好的文件复制到Droplet中呢？
Nvm 我想通了，现在更大的问题是，当我尝试使用 runserver 时，它给了我一个错误提示 django.db.utils.ProgrammingError: relation "website_gallery" does not exist LINE 1: ...bsite_gallery"."id", "website_gallery"."img" FROM "website_g...
你运行migrations了吗？

标签： python django digital-ocean

【解决方案1】：

您可能已经添加了一个新模型Gallery，但之后您忘记在液滴上运行makemigrations 和migrate。然后，您在 website/views.py 中的视图函数中添加了一些代码，该代码试图从数据库中获取 Gallery 模型，但它们还不存在，因此 Django 给出了错误。

要解决此问题，请尝试注释掉使用 Gallery 模型的特定视图函数中的每一行代码，然后创建/运行迁移。

之后你可以取消注释所有使用Gallery模型的代码，因为相应的表现在已经存在于数据库中，所以查询会成功。

【讨论】：