更新 post 后,我希望将用户重定向到 post (Django - Python)

After updating the post, I want the user to be redirected to the post (Django - Python)

我希望用户能够更新现有的 post。当用户单击更新,然后单击 Post 时,他们会收到一条错误消息,指出没有要指向的 URL。但是 post 确实在后端得到更新。

我认为行 return reverse('article_detail', kwargs={'slug': self.slug}) 会将他们重定向回原来的 post。

class Post(models.Model):
    title = models.CharField(max_length=100)
    content =  models.TextField()
    date_posted = models.DateTimeField(default=timezone.now())
    author = models.ForeignKey(User, on_delete=models.CASCADE)
    url= models.SlugField(max_length=500, blank=True)
    #url= models.SlugField(max_length=500, unique=True, blank=True)

    def save(self, *args, **kwargs):
        self.url= slugify(self.title)
        super().save(*args, **kwargs)

    def __str__(self):
        return self.title 

    def get_absolute_url(self):
        return reverse('article_detail', kwargs={'slug': self.slug})

这是 table 架构。

sqlite> .schema blog_post
CREATE TABLE IF NOT EXISTS "blog_post" ("id" integer NOT NULL PRIMARY KEY AUTOINCREMENT, "title" varchar(100) NOT NULL, "content" text NOT NULL, "url" varchar(500) NOT NULL, "author_id" integer NOT NULL REFERENCES "auth_user" ("id") DEFERRABLE INITIALLY DEFERRED, "date_posted" datetime NOT NULL);
CREATE INDEX "blog_post_url_5af1045a" ON "blog_post" ("url");
CREATE INDEX "blog_post_author_id_dd7a8485" ON "blog_post" ("author_id");
sqlite>

views.py

class PostUpdateView(LoginRequiredMixin, UserPassesTestMixin, UpdateView):
    model = Post
    fields = ['title', 'content']

    def form_valid(self, form):
        form.instance.author = self.request.user
        return super().form_valid(form)


    def test_func(self):
        post = self.get_object()
        if self.request.user == post.author:
            return True
        return False

urls.py

urlpatterns = [
    path('', PostListView.as_view(), name='blog-home'),
    path('post/<int:pk>/', views.post_detail, name='post-detail'),
    path('post/new/', PostCreateView.as_view(), name='post-create'),
    path('post/<int:pk>/update/', PostUpdateView.as_view(), name='post-update'),
    path('post/<int:pk>/delete/', PostDeleteView.as_view(), name='post-delete'),
    path('about/', views.about, name='blog-about'),
    path('facebook/',TemplateView.as_view(template_name='blog/index.html'), name="facebook")
]

更新

我以前有self.url= slugify(self.title),现在改成了self.url= slugify(self.id)。因为要访问我的 post,您输入的是 ID 号而不是职位。不幸的是,问题仍然存在。

class Post(models.Model):
    title = models.CharField(max_length=100)
    content =  models.TextField()
    date_posted = models.DateTimeField(default=timezone.now())
    author = models.ForeignKey(User, on_delete=models.CASCADE)
    url= models.SlugField(max_length=500, blank=True)
    #url= models.SlugField(max_length=500, unique=True, blank=True)

    def save(self, *args, **kwargs):
        self.url= slugify(self.id)
        super().save(*args, **kwargs)

更新 2

我现在收到此错误消息。

未找到 'article_detail' 的反向。 'article_detail' 不是有效的视图函数或模式名称。

修复 get_absolute_url

def get_absolute_url(self):
    return reverse('post-detail', kwargs={'pk': self.pk})