dynamic url for specific primary key in Django

Question

My model has a field call topic, and I want to create a page which can show the specific, and the urls can be dynamic path to different topics rendered by the same html template. How do I suppose to do it?

models.py:

TOPIC = (
    (0,"Finance"),
    (1,"Toys"),
    (2,"Foods"),
    (3,"Travel"),
)

class Post(models.Model):
    name = models.CharField(max_length=200)
    slug = models.SlugField(unique=True, max_length=200)
    author = models.ForeignKey(User, on_delete=models.CASCADE,related_name='blog_posts')
    updated_on = models.DateTimeField(auto_now= True)
    created_on = models.DateTimeField(auto_now_add=True)
    body = RichTextField(null=True)
    status = models.IntegerField(choices=STATUS, default=0)
    topic = models.IntegerField(choices=TOPIC, default=0)
    cover_img = models.ImageField(upload_to='post_cover', null=True, default='post_cover/coming_soon.jpg')

def __str__(self):
    return self.name

def get_img(self):
    return f"{'/media/post_cover/'+self.cover_img}"

html

<div class="col-md-6 mt-3 ">
     <a href="{% url 'topic_list' %}">
        <img src="../media/topic/travel3.jpg" alt=''>
     </a>
</div>

views.py

def topic_list(request):
    posts = Post.objects.filter(topic=0)
    context = {'posts': posts, 'autor_list':autor_list}
    return render(request, 'topic_list.html', context)

urls.py

from django.urls import path
from . import views


urlpatterns = [
     path('', views.home, name='home'),
     path('topic/', views.topic_list, name='topic_list'),
     path('<slug:slug>/', views.post_detail, name='post_detail'),]

Are you asking 1) how to build URLs in the post_list template to each post or 2) how to make a correct URL pattern and a view for post_detail page? — IVNSTN
– IVNSTN, Commented Apr 6, 2020 at 17:00
actually I wamt to build a url for each topic of post list, so I dont need to make 4 pages for those 4 topic, just 1 dynamic url can go every topics — Hugo Yu
– Hugo Yu, Commented Apr 7, 2020 at 1:12

IVNSTN · Accepted Answer · 2020-04-07 12:38:37Z

2

To generate a dynamic url in the template use url-reversion function with arguments

{% for post in post_list %}
   <a href="{% url 'post_detail' post.slug %}">{{ post.name}}</a>
{% endfor %}

this will reverse post_detail url pattern from your urls.py with post.slug value passed to '<slug:slug>/'

If you need to list posts per topic then fix your url pattern and the view like below:

urlpatterns = [
     ...
     path('topic/<int:pk>/', views.topic_post_list, name='topic-posts-list'),
]

def topic_post_list(request, pk):
    posts = Post.objects.filter(topic_id=pk, )
    context = {'posts': posts, }
    return render(request, 'post_list.html', context)

edited Apr 7, 2020 at 12:38

answered Apr 7, 2020 at 6:42

IVNSTN

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4 Comments

Hugo Yu Over a year ago

what if I want to go to the post_list and filter the primary key by 'topic'? just like the hm_pg.html have a url can go to {% url 'post_list' pk=post.topic %}, the dynamic url for topic in models.py

IVNSTN Over a year ago

You better fix your views and patterns names. If you want to see posts for particular topic - name it topic_post_list or something like that.

Hugo Yu Over a year ago

so what's next after I name it? how to go different topic post list by dynamic url?

IVNSTN Over a year ago

In my code it is topic-posts-list, not post_list.

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