Python ValueError：字段'；id'；应为一个数字，但得到'；index.html'；_Python_Html_Django

Python ValueError：字段'；id'；应为一个数字，但得到'；index.html'；

python html django

Python ValueError：字段'；id'；应为一个数字，但得到'；index.html'；,python,html,django,Python,Html,Django,我正在尝试使用Django创建一个简单的待办事项列表应用程序。但是如果遇到此错误，将运行服务器ValueError:Field'id'需要一个数字，但得到了'index.html'。 models.py from django.db import models class List(models.Model): item = models.CharField(max_length=200) completed = models.BooleanField(default=Fals

我正在尝试使用Django创建一个简单的待办事项列表应用程序。但是如果遇到此错误，将运行服务器ValueError:Field'id'需要一个数字，但得到了'index.html'。

models.py

from django.db import models

class List(models.Model):
    item = models.CharField(max_length=200)
    completed = models.BooleanField(default=False)

    def __str__(self):
        return self.item + '|' + str(self.completed)

url.py

from . import views

urlpatterns = [
    path("index",views.index, name="home"),
    path("delete/<list_id>/", views.delete , name="delete"),
]

index.html

{% extends 'home.html' %}

{% block content %}
    {% if messages %}
        {% for message in messages %}
            <div class="alert alert-warning alert-dismissable" role="alert">
                <button class="close" data-dismiss="alert">
                    <small><sup>x</sup></small>
                </button>
                {{ message }}
            </div>
        {% endfor %}
    {% endif %}
    {% if all_items %}
    <table class="table table-bordered">
        {% for things in all_items %}
            <tr>
                <td>{{ things.item }}</td>
                <td><center>{{ things.completed }}</center></td>
                <td><center><a href="{% url 'delete' things.id %}">Delete</a></center></td>
            </tr>
        {% endfor %}
    </table>
    {% endif %}


{% endblock content %}

有人能告诉我我在哪里犯的错误吗？

提前感谢

尝试将

“{%url'delete'things.id%}”替换为“{%url”：delete'things.id%}”
应用程序名应替换为您的应用程序名。在Django 2.x中，同样的格式也适用于我。
看看你正在访问的url，它是127.0.0.1:8000/delete/index.html
，如果我们假设东西id是5，它应该是127.0.0.1:8000/delete/5
。这意味着{%url'delete'things.id%}
是错误的，没有建立正确的url。好的，兄弟，那么你能告诉我如何纠正错误吗？这可能是你的urlpattern，因为你期望的url参数是thing.id
，你的模式应该像'delete/'。我再次面临同样的问题，兄弟
{% extends 'home.html' %}

{% block content %}
    {% if messages %}
        {% for message in messages %}
            <div class="alert alert-warning alert-dismissable" role="alert">
                <button class="close" data-dismiss="alert">
                    <small><sup>x</sup></small>
                </button>
                {{ message }}
            </div>
        {% endfor %}
    {% endif %}
    {% if all_items %}
    <table class="table table-bordered">
        {% for things in all_items %}
            <tr>
                <td>{{ things.item }}</td>
                <td><center>{{ things.completed }}</center></td>
                <td><center><a href="{% url 'delete' things.id %}">Delete</a></center></td>
            </tr>
        {% endfor %}
    </table>
    {% endif %}


{% endblock content %}

<!doctype html>
<html lang="en">
  <head>
    <!-- Required meta tags -->
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">

    <!-- Bootstrap CSS -->
    <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">

    <title>Home</title>
  </head>
  <body>
    <nav class="navbar navbar-expand-lg navbar-dark bg-dark">
  <a class="navbar-brand" href="{% url 'home' %}">To-Do Lists</a>
  <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
    <span class="navbar-toggler-icon"></span>
  </button>

  <div class="collapse navbar-collapse" id="navbarSupportedContent">
    <ul class="navbar-nav mr-auto">
    </ul>
    <form class="form-inline my-2 my-lg-0" method="POST">
        {% csrf_token %}
      <input class="form-control mr-sm-2" type="search" placeholder="Add Items" aria-label="Search" name="item">
      <button class="btn btn-outline-secondary my-2 my-sm-0" type="submit">Add To List</button>
    </form>
  </div>
</nav>
    <br/>
    <div class="container">
   {% block content %}
   {% endblock content %}
    </div>
    <!-- Optional JavaScript -->
    <!-- jQuery first, then Popper.js, then Bootstrap JS -->
    <script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js" integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1" crossorigin="anonymous"></script>
    <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous"></script>
  </body>
</html>

# Generated by Django 3.1.1 on 2020-09-27 05:07

from django.db import migrations, models


class Migration(migrations.Migration):

    initial = True

    dependencies = [
    ]

    operations = [
        migrations.CreateModel(
            name='List',
            fields=[
                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
                ('item', models.CharField(max_length=200)),
                ('completed', models.BooleanField(default=False)),
            ],
        ),
    ]