CODEWITHSUNDEEP
pythonhtmldjango
Echiye Godspower
Echiye Godspower

Reputation: 1

How to Retrieve Post by Each Category in a Blog and Place them on postlist html page in django

Am creating a blog and a news website in django which have a specific category displayed on its hompage. That is the specific category for news, Politics and education are beeing displayed on my post_list.html. I get a no exception provided when i try to retrieve it by

Post.objects.filter(category__name__in=["news"])

This is the model for my category

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

This is the model for my Post

class Post(models.Model):
    image = models.ImageField(upload_to="images/")
    title = models.CharField(max_length=150)
    summary = models.CharField(max_length=250)
    category = models.ForeignKey(Category, on_delete=models.CASCADE)

*This is the view for my postlist

class PostListView(ListView):
       model = Post 
       template_name = blog/post_list.html
       context_object_name = "posts"
       ordering = ["date_posted"
       paginate_by = 5


def get_queryset(self):
    posts = 
    get_object_or_404(Post)
    return  Post.objects.filter().order_by( "-date_posted")


def get_context_data(self, **kwargs):
    context = super().get_context_data(**kwargs)
    context['posts'] = Post.objects.filter()[0:4] 
    context['new_cat'] =Post.objects.filter(category__name__in=[" news"])[0.5] 
    context['new_politics'] = Post.objects.filter(category__name__in=["politics"])[0.5]
 
    return context ***

This is my pos_tlist.html code for retrieving post by category in news

  <div> <h1>News</h1> <div/>  
{% for post in new_cat%} 
  div class="mt-2" 
 <a href="{{ post.get_absolute_url }}"><img class="object-cover w-full rounded-lg" src="{{ post.image.url }}" alt="{{ post.title }} cover"> </a></div>
<div class="py-2 flex flex-row items-center justify-between">
        <a href="{{ post.get_absolute_url }}"><h1 class="hover:text-blue-600 text-gray-900 font-bold text-xl mb-2 py-2">{{ post.title }}</h1></a></div> '''

I get a no exception provided for this post when i run python manage.py runserver But when i go to my shell , python manage.py shell I get a full list of all the post. But it refuses to display on hompage I need help in doing this and making all my category appear per category on news page Is there any solution for all my post to appear category by category on post_list.html and homepage

In summary- i can't filter post that have a Foreign key Models like Category, Author in my Post Model. I can directly filter post from the post model but i can't filter post title from the category Name models

That means when i try to filter Post.objects.all() then all my post will come out but when i try Post.objects.filter(category__name__in=["news"]) nothing will show in my page except no exeption error

Help

Upvotes: 0

Views: 186

Answers (1)

GProst
GProst

Reputation: 10227

Could a problem be in whitespace you have in " news" here?

Post.objects.filter(category__name__in=[" news"])[0.5]

Also, what is [0.5]? I guess you want [0:5] there?

Also, make sure your get_queryset and get_context_data methods are indented properly. Because if they have no indent as you showed it then they defined outside of your PostListView class...

Upvotes: 2

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