Django DetailView with few url parameters - django

Question

Let's say I have next models:
class Category(models.Model):
cat_name = models.CharField(u'name',max_length=50, unique=True)
slug = models.SlugField(u'URL',unique=True)
class News(models.Model):
title = models.CharField(max_length=250)
slug = models.SlugField(unique=True)
category = models.ForeignKey(Category,null=True,on_delete=models.SET_NULL)
And my get_absolute_url function looks like that:
def get_absolute_url(self):
return ('news:detail',(), {'slug':self.slug})
And url looks like /article/<slug>
If I want to have URL like <category.slug><news.slug> ? How can I do that?

Answer 1

You can do that:
# models.py
def get_absolute_url(self):
return ('news:detail', (), {
'category_slug': self.category.slug,
'slug': self.slug,
})
# views.py
class NewsDetail(DetailView):
model = News
slug_field = 'slug'
slug_url_kwarg = 'slug'
def get_queryset(self):
return News.objects.filter(category__slug=self.kwargs['category_slug'])
# urls.py
url(r'(?P<category_slug>[a-z0-9\-]+)/(?P<slug>[a-z0-9\-]+)/$', NewsDetail.as_view(), name='news')
So the idea is to add 2 parameters to your url definition. Last one is usual to query a news row and the first one will used by get_queryset to filter the news by the specified category.
More about parameters in urls in docs - https://docs.djangoproject.com/en/1.9/topics/http/urls/#named-groups