Question

我在更新视图和删除视图上遇到麻烦。代码下方：

views.py

from django.shortcuts import get_object_or_404, redirect, render
from django.utils.text import slugify

from .forms import BlogTagForm
from .models import BlogTag

def updateBlogTag(request, slug_tag=None):
    update_tag = get_object_or_404(BlogTag, slug_tag=slug_tag)
    form = BlogTagForm(request.POST or None, instance=update_tag)
    if form.is_valid():
        update_tag = form.save(commit=False)
        update_tag.slug_tag = slugify(update_tag.tag_name)
        update_tag.save()
        return redirect('tag_list')

    context = {
        'form': form,
        }
    template = 'blog/editing/create_tag.html'
    return render(request, template, context)

def deleteBlogTag(request, slug_tag):
    if request.method == 'POST':
        tag = BlogTag.objects.get(slug_tag=slug_tag)
        tag.delete()
    return redirect('tag_list')

models.py

from django.db import models
from django.urls import reverse

class BlogTag(models.Model):
    tag_name = models.CharField(
        'Tag',
        max_length=50,
        help_text="Every key concept must be not longer then 50 characters",
        unique=True,
        )
    slug_tag = models.SlugField(
        'Slug',
        unique=True,
        help_text="Slug is a field in autocomplete mode, but if you want you can modify its contents",
        )

    def __str__(self):
        return self.tag_name

    def get_absolute_url(self):
        return reverse("single_blogtag", kwargs={"slug_tag": self.slug_tag})

    class Meta:
        ordering = ['tag_name']

forms.py

from django import forms
from .models import BlogTag

class BlogTagForm(forms.ModelForm):
    tag_name = forms.CharField(
        max_length=50,
        help_text="<small>Write a tag here. The tag must be have max 50 characters.</small>",
        widget=forms.TextInput(
                            attrs={
                                "placeholder": "Tag",
                                "type": "text",
                                "id": "id_tag",
                                "class": "form-control form-control-lg",
                                }
                            ),
        )

    class Meta:
        model = BlogTag
        fields = ["tag_name"]

urls.py

path("update-tag/", views.updateBlogTag, name='update_tag'),
path("delete-tag/", views.deleteBlogTag, name='delete_tag'),

tag_list.html

  <table class="table table-striped shadow">
    <thead>
      <tr>
        <th>Tag</th>
        <th>Related Posts</th>
        <th class="text-center">Actions</th>
      </tr>
    </thead>
    <tbody>
      {% for tag in tag_list %}
      <tr>
        <td>{{ tag.tag_name }}</td>
        <td><a href="{{ tag.get_absolute_url }}">{{ tag.tag_blogpost.count }}</a></td>
        <td>

          <div class="row justify-content-md-center">
            <a class="btn btn-success btn-sm mx-1" href="{#% url 'update_tag' slug_tag=tag.slug_tag %#}">Update</a>

            <button class="btn btn-danger btn-sm mx-1" type="button" data-toggle="modal" data-target="#deleteModal">Delete</button>

            <div class="modal fade" id="deleteModal" tabindex="-1" role="dialog" aria-labelledby="deleteModalLabel" aria-hidden="true">
              <div class="modal-dialog" role="document">
                <div class="modal-content">
                  <div class="modal-header">
                    <h2 class="modal-title text-center" id="deleteModalLabel">Delete Request</h2>
                  </div>
                  <div class="modal-body">
                    <h3>Are you sure to delete this tag?</h3>
                    <h1 class="py-4"><em><strong>{{ tag.tag_name }}</strong></em></h1>
                  </div>
                  <div class="modal-footer">
                    <button type="button" class="btn btn-primary btn-sm" data-dismiss="modal">No, don't do this</button>
                    <form action="{% url 'delete_tag' tag.slug_tag %}" method="POST">
                      {% csrf_token %}
                      <button class="btn btn-danger btn-sm" type="submit" name="button">Yes, delete it</button>
                    </form>
                  </div>
                </div>
              </div>
            </div>
          </div>

        </td>
      </tr>

      {% endfor %}
    </tbody>
  </table>

我已经将相同类型的代码用于其他视图而没有问题，但是在这种情况下，我遇到了这个错误：

  在/ blog / tags /
上的
更新视图 NoReverseMatch
使用关键字参数'{'slug_tag'的'update_tag'反向：   找不到'altro-tag'}'。尝试了1种模式：['blog / update \ -tag / $']

删除视图 / blog / tags /
上的NoReverseMatch
找不到带有参数'（'altro-tag'，）'的'delete_tag'的反向字符。 1个   尝试过的模式：['博客/删除\-标签/ $']

我不知道我的代码中的错误在哪里。有人可以告诉我错误在哪里？

Answer 1

该错误即将到来是因为您在构建URL时未添加尖括号来捕获子弹。我假设您的网址看起来像这样url(r'blog/update-tag/$', updateBlogTag(), name='updated_tag')和url(r'blog/delete-tag/$', deleteBlogTag(), name='delete_tag')，而他们应该看起来像这样url(r'blog/update-tag/<slug:slug_tag>/$', updateBlogTag(), name='updated_tag')和url(r'blog/delete-tag/<slug:slug_tag>/$', deleteBlogTag(), name='delete_tag') reference

NoReverseMatch错误，用于更新和删除视图

1 个答案: