如何在基于类的视图中使用 url 变量

Question

我在 url 变量和基于类的视图方面有问题，但主要是在 html 或模板中，因为我不知道如何表示它，我将向您展示代码以便您理解。

urls.py

app_name = 'app1'

urlpatterns = [

    path('add_post/<str:sym>',AddPostView.as_view(), name='addpost'),

]

views.py

class AddPostView(CreateView):

    model = Post

    form_class = PostForm

    template_name = 'app1/createpost.html'

    def get_queryset(self):

        ala = Post.objects.filter(stock__symbol=self.kwargs['sym'])

        return ala

models.py

class StockNames(models.Model):

    name = models.CharField(max_length=255)

    symbol = models.CharField(max_length=255)

    def __str__(self):

        return self.symbol

        

    

class Post(models.Model):

    title = models.CharField(max_length= 255)

    header_image = models.ImageField(null = True, blank = True, upload_to = 'images/')

    author = models.ForeignKey(User, on_delete=models.CASCADE)

    body = RichTextField(blank = True, null = True)

    #body = models.TextField()

    post_date = models.DateField(auto_now_add=True)

    category = models.CharField(max_length=255, default='coding')

    snippet = models.CharField(max_length=255)

    likes = models.ManyToManyField(User, related_name = 'blog_posts')

    stock = models.ForeignKey(StockNames, null=True, on_delete = models.CASCADE)

    def total_likes(self):

        return self.likes.count()

    def __str__(self):

        return self.title + ' | ' + str(self.author)

    

    def get_absolute_url(self):

        return reverse('app1:article-detail', args=(self.id,))

模板（我在添加帖子（当前）时遇到问题）

{% extends "app1/base.html" %}

    {% block body_block %}

    

    

    {% if stock_sym %}

    <h1> {{sym}} </h1>

    <a href ="{% url 'app1:addpost' StockNames.symbol %}">Add Post<span class="sr-only">(current)</span></a> 

        {% if stocks %}

Answer 1

尝试：<a href ="{% url 'app1:addpost' sym=sym %}">Add Post<span class="sr-only">(current)</span></a>Views.py - 尝试切换 get_context_data 的方法：class AddPostView(CreateView):     model = Post     form_class = PostForm     template_name = 'app1/createpost.html'     def get_context_data(self, *args, **kwargs):         context = super().get_context_data(**kwargs)         context.update(             sym=get_object_or_404(StockNames, StockNames.symbol)         )                 return context