对 'post_detail' 进行反转，参数为 '('chempion',)' 未找到。尝试了 1 种模式：['(?P<category_slug>

Question

'post_detail' 的反转，未找到参数“('chempion',)”。尝试了 1 种模式：['(?P[-a-zA-Z0-9_]+)/(?P[-a-zA-Z0-9_]+)/$' ]

当我向模板添加函数和视图时，我发现了这个错误

view.py

def post_detail(request, category_slug, slug):
    post = get_object_or_404(Post, slug=slug)

    try:
        next_post = post.get_next_by_date_added()
    except Post.DoesNotExist:
        next_post = None

    try:
        previous_post = post.get_previous_by_date_added()
    except Post.DoesNotExist:
        previous_post = None

    context = {
        'post': post,
        'next_post': next_post,
        'previous_post': previous_post
    }

    return render(request, 'post_detail.html', context)

urls.py

  path('<slug:category_slug>/<slug:slug>/', post_detail, name='post_detail'),
    path('<slug:slug>/', category_detail, name='category_detail'),

post detail.html

 {% if next_post %}
    <a href="{% url 'post_detail' next_post.slug %}">Next</a>
 {% else %}
    This is the last post!
 {% endif %}

Answer 1

post_detail 视图需要两个 slug：一个用于类别，一个用于 post。

例如，如果您的 Post 模型有一个 ForeignKey 到 Category 模型，您可以通过以下方式引用它：

<a href="{% url 'post_detail' <b>next_post.category.slug</b> next_post.slug %}">Next</a>

在您看来，您可能想要检查类别 的 slug 和 post 的 ，所以：

def post_detail(request, category_slug, slug):
    post = get_object_or_404(Post<b>, category__slug=category_slug</b>, slug=slug)
    # …

对 'post_detail' 进行反转，参数为 '('chempion',)' 未找到。尝试了 1 种模式：['(?P<category_slug>

Reverse for 'post_detail' with arguments '('chempion',)' not found. 1 pattern(s) tried: ['(?P<category_slug>

django

reverse