Question

我创建了一个简单的类别模型。

模型

我创建如下。我在哪里会在这些模型文件中出错？谢谢你的帮助。

models.py 我添加到文件中的代码如下。

class Category(models.Model):
    category_name = models.CharField(max_length=250)
    category_desc = models.TextField()
    slug = models.SlugField(max_length=250, unique=True)

class Meta:
    ordering = ('category_name',)
    verbose_name = 'category'
    verbose_name_plural = 'Categories'

def get_absolute_url(self):
    return reverse('article:categories', args=[self.slug])

def __str__(self):
    return self.category_name

views.py 我添加到文件中的代码如下。

def article_category(request, category_slug):
    categories = Category.objects.all()
    article = Article.objects.filter( article_status='published')
    if category_slug:
        category = get_object_or_404(Category, slug=category_slug)
        article = article.filter(category=category)
    template = 'article/category.html'
    context = {'article': article}
return render(request, template, context)

url.py

url(r'^category/(?P<category_slug>[-\w]+)/$', article_category, name='article_category'),

index.html 我添加到文件中的代码如下。

<a href="{{ articles.article_category.get_absolute_url }}">{{ article.article_category }}</a>

Answer 1

You should remove the non-sens categories variable in your view if you don't use it.

You can't call the .filter() method on your instance. Change:

if category_slug:
    category = get_object_or_404(Category, slug=category_slug)
    article = article.filter(category=category)

to:

if category_slug:
    category = get_object_or_404(Category, slug=category_slug)
    article = Article.objects.filter(article_status='published', category=category)

You have to provide a url slug, that condition is useless anyway.

The article variable is a list with all of the entries that pass those filters. It must be articles.

What index.html has to do with your view, if you render the article/category.html ?

Why you render the article/category.html, if you want to display all articles filtered by that category?

Why aren't you using ForeignKey for this kind of relation.

If it's a list of articles, as I said, in your template you should have something like this (supposing you renamed article with articles):

{% for article in articles %}
    <a href="{{ article.get_absolute_url }}">{{ article.name }}</a>
{% endfor %}

You haven't showed the Article model, so I supposed that there's .get_absolute_url and .name.

Ask me if you haven't understood something.

Django：类别模型中的URL错误

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