我无法打开我的本地服务器。我做了待办事项清单答案

【问题标题】：I can't open my local server. I made todo list我无法打开我的本地服务器。我做了待办事项清单
【发布时间】：2019-10-14 09:36:24
【问题描述】：

现状

我制作了简单的“待办事项清单”。我是从日文网站复制粘贴的。这些程序在途中进行得很顺利，但是当我设置本地服务器时，发生了这个错误

python manage.py runserver 8080

Performing system checks...

System check identified no issues (0 silenced).

You have 17 unapplied migration(s). Your project may not work properly until you apply the migrations for app(s): admin, auth, contenttypes, sessions.
Run 'python manage.py migrate' to apply them.
October 14, 2019 - 18:23:49
Django version 2.2.5, using settings 'mysite.settings'
Starting development server at http://127.0.0.1:8080/
Quit the server with CTRL-BREAK.
C:\Users\kazu\Anaconda3\lib\site-packages\django\views\generic\list.py:88: UnorderedObjectListWarning: Pagination may yield inconsistent results with an unordered object_list: <class 'todo.models.Todo'> QuerySet.
  allow_empty_first_page=allow_empty_first_page, **kwargs)
Internal Server Error: /todo/list/
Traceback (most recent call last):
  File "C:\Users\kazu\Anaconda3\lib\site-packages\django\db\backends\utils.py", line 84, in _execute
    return self.cursor.execute(sql, params)
  File "C:\Users\kazu\Anaconda3\lib\site-packages\django\db\backends\sqlite3\base.py", line 383, in execute
    return Database.Cursor.execute(self, query, params)
sqlite3.OperationalError: no such table: todo_todo

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "C:\Users\kazu\Anaconda3\lib\site-packages\django\core\handlers\exception.py", line 34, in inner
    response = get_response(request)
  File "C:\Users\kazu\Anaconda3\lib\site-packages\django\core\handlers\base.py", line 115, in _get_response
    response = self.process_exception_by_middleware(e, request)
  File "C:\Users\kazu\Anaconda3\lib\site-packages\django\core\handlers\base.py", line 113, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "C:\Users\kazu\Anaconda3\lib\site-packages\django\views\generic\base.py", line 71, in view
    return self.dispatch(request, *args, **kwargs)
  File "C:\Users\kazu\Anaconda3\lib\site-packages\django\views\generic\base.py", line 97, in dispatch
    return handler(request, *args, **kwargs)
  File "C:\Users\kazu\Anaconda3\lib\site-packages\django\views\generic\list.py", line 157, in get
    context = self.get_context_data()
  File "C:\Users\kazu\Anaconda3\lib\site-packages\django\views\generic\list.py", line 119, in get_context_data
    paginator, page, queryset, is_paginated = self.paginate_queryset(queryset, page_size)
  File "C:\Users\kazu\Anaconda3\lib\site-packages\django\views\generic\list.py", line 69, in paginate_queryset
    page = paginator.page(page_number)
  File "C:\Users\kazu\Anaconda3\lib\site-packages\django\core\paginator.py", line 70, in page
    number = self.validate_number(number)
  File "C:\Users\kazu\Anaconda3\lib\site-packages\django\core\paginator.py", line 48, in validate_number
    if number > self.num_pages:
  File "C:\Users\kazu\Anaconda3\lib\site-packages\django\utils\functional.py", line 80, in __get__
    res = instance.__dict__[self.name] = self.func(instance)
  File "C:\Users\kazu\Anaconda3\lib\site-packages\django\core\paginator.py", line 97, in num_pages
    if self.count == 0 and not self.allow_empty_first_page:
  File "C:\Users\kazu\Anaconda3\lib\site-packages\django\utils\functional.py", line 80, in __get__
    res = instance.__dict__[self.name] = self.func(instance)
  File "C:\Users\kazu\Anaconda3\lib\site-packages\django\core\paginator.py", line 91, in count
    return c()
  File "C:\Users\kazu\Anaconda3\lib\site-packages\django\db\models\query.py", line 392, in count
    return self.query.get_count(using=self.db)
  File "C:\Users\kazu\Anaconda3\lib\site-packages\django\db\models\sql\query.py", line 504, in get_count
    number = obj.get_aggregation(using, ['__count'])['__count']
  File "C:\Users\kazu\Anaconda3\lib\site-packages\django\db\models\sql\query.py", line 489, in get_aggregation
    result = compiler.execute_sql(SINGLE)
  File "C:\Users\kazu\Anaconda3\lib\site-packages\django\db\models\sql\compiler.py", line 1100, in execute_sql
    cursor.execute(sql, params)
  File "C:\Users\kazu\Anaconda3\lib\site-packages\django\db\backends\utils.py", line 99, in execute
    return super().execute(sql, params)
  File "C:\Users\kazu\Anaconda3\lib\site-packages\django\db\backends\utils.py", line 67, in execute
    return self._execute_with_wrappers(sql, params, many=False, executor=self._execute)
  File "C:\Users\kazu\Anaconda3\lib\site-packages\django\db\backends\utils.py", line 76, in _execute_with_wrappers
    return executor(sql, params, many, context)
  File "C:\Users\kazu\Anaconda3\lib\site-packages\django\db\backends\utils.py", line 84, in _execute
    return self.cursor.execute(sql, params)
  File "C:\Users\kazu\Anaconda3\lib\site-packages\django\db\utils.py", line 89, in __exit__
    raise dj_exc_value.with_traceback(traceback) from exc_value
  File "C:\Users\kazu\Anaconda3\lib\site-packages\django\db\backends\utils.py", line 84, in _execute
    return self.cursor.execute(sql, params)
  File "C:\Users\kazu\Anaconda3\lib\site-packages\django\db\backends\sqlite3\base.py", line 383, in execute
    return Database.Cursor.execute(self, query, params)
django.db.utils.OperationalError: no such table: todo_todo
[14/Oct/2019 18:25:18] "GET /todo/list/ HTTP/1.1" 500 165625
Not Found: /favicon.ico
[14/Oct/2019 18:25:19] "GET /favicon.ico HTTP/1.1" 404 2077

我没有发现有错误的文件。所以如果你知道哪个文件有错误，你能告诉我吗？我会把代码贴在文件里。

【问题讨论】：

你跑过manage.py makemigrations和manage.py migrate吗？
您有 17 个未应用的迁移。在您为应用程序应用迁移之前，您的项目可能无法正常工作：admin、auth、contenttypes、sessions。运行“python manage.py migrate”以应用它们。

标签： python django localhost

【解决方案1】：

sqlite3.OperationalError: no such table: todo_todo,

这意味着您的数据库中没有名为 todo 的表 - db.sqlite3。当在model 中进行更改时，您需要进行迁移，这是django 中的标准步骤，然后通过@YevhenKuzmovych 在 cmets 中提到的命令在您的数据库中创建表。

python manage.py makemigrations

然后

python manage.py migrate

养成在对包含模型类的 models.py 进行任何更改时始终运行这两个命令的习惯

【讨论】：