Hope you can help me with this one.I am very new to Python/Django so my code might be quite bad. I am creating a website/blog and on my navigation bar I have a list of the categories which contain dropdown menues with the subcategories. When I click on each subcategory I want it to display just the posts from that subcategory. Here is part of my code for this:
"Models":
from django.db import models
from django.utils import timezone
from django.utils.text import slugify
from django.urls import reverse
from ckeditor_uploader.fields import RichTextUploadingField
class Post(models.Model):
NO_CATEGORY = 'No Category'
GETTING_STARTED = 'Getting Started'
DIY = "DIY"
GARDENS = 'Gardens'
TERRARIUMS = 'Terrariums'
CATEGORIES = (
(NO_CATEGORY, 'No Category'),
(GETTING_STARTED, 'Getting Started'),
(DIY, 'DIY'),
(GARDENS, 'Gardens'),
(TERRARIUMS, 'Terrariums'),
)
title = models.CharField(max_length=200, unique=True)
slug = models.SlugField(unique=True, default='', blank=True)
image = models.ImageField(upload_to='images/')
content = RichTextUploadingField(null=True, blank=True)
summary = models.CharField(max_length=150, unique=True, null=True)
category = models.CharField(choices=CATEGORIES, max_length=15, default=NO_CATEGORY)
subcategory = models.ForeignKey('Subcategory', on_delete=models.SET_NULL, null=True)
created_date = models.DateTimeField(default=timezone.now)
def __str__(self):
return self.title
def save(self, *args, **kwargs):
self.slug = slugify(self.title)
super(Post, self).save(*args, **kwargs)
def get_absolute_url(self):
return reverse('core:post_detail', args=[str(self.slug)])
class Meta:
ordering = ['-created_date']
class Subcategory(models.Model):
NO_CATEGORY = 'No Category'
TOOLS = 'Tools'
HOW_TO = 'How To'
SUPPLIES = 'Supplies'
FURNITURE = 'Furniture'
ACCESSORIES = 'Accessories'
DECOR = 'Decor'
MINIATURE = 'Miniature'
MICRO = 'Micro'
OPEN = 'Open'
ENCLOSED = 'Enclosed'
SUBCATEGORIES = [
(NO_CATEGORY, 'No Category'),
('Getting Started', ((TOOLS, 'Tools'), (HOW_TO, 'How To'), (SUPPLIES, 'Supplies'),)),
('DIY', ((FURNITURE, 'Furniture'), (ACCESSORIES, 'Accessories'), (DECOR, 'Decor'),)),
('Gardens', ((MINIATURE, 'Miniature'), (MICRO, 'Micro'),)),
('Terrariums', ((OPEN, 'Open'), (ENCLOSED, 'Enclosed'),)),
]
name = models.CharField(choices=SUBCATEGORIES, max_length=15, default=NO_CATEGORY)
slug = models.SlugField(max_length=150, unique=True, null=True)
class Meta:
verbose_name = "Subcategory"
verbose_name_plural = "Subcategories"
def get_posts(self):
return Post.objects.filter(subcategories_name=self.name)
def __str__(self):
return self.name
def get_absolute_url(self):
return reverse('core:post_subcategory', kwargs={'slug': self.slug})
class Picture(models.Model):
title = models.CharField(max_length=100, unique=True)
image = models.ImageField(upload_to='images/gallery/')
created_date = models.DateTimeField(default=timezone.now)
def __str__(self):
return f'{self.title}'
class Meta:
ordering = ['-created_date']
"Views":
from django.shortcuts import render
from .models import Post, Subcategory, Picture
from django.core.paginator import Paginator
from django.views import generic
def base(request):
return render(request, 'core/base.html')
def home(request):
posts = Post.objects.all()
paginator = Paginator(posts, 5)
page = request.GET.get('page')
posts = paginator.get_page(page)
return render(request, 'core/home.html', {'posts': posts})
class PostList(generic.ListView):
model = Post
queryset = Post.objects.all().order_by('-created_date')
template_name = 'home.html'
def post_detail(request, slug=None):
post = Post.objects.get(slug=slug)
return render(request, 'core/post_detail.html', {'post': post})
class PostDetail(generic.DetailView):
model = Post
template_name = 'post_detail.html'
def post_subcategory(request):
subcategories = Subcategory.objects.all()
paginator = Paginator(subcategories, 5)
page = request.GET.get('page')
subcategories = paginator.get_page(page)
return render(request, 'core/post_subcategory.html', {'subcategories': subcategories})
class SubcategoryDetailView(generic.DetailView):
model = Subcategory
context_object_name = 'subcategory'
template_name = 'core/post_subcategory.html'
def get_queryset(self):
return Post.objects.filter(subcategory_id=self.kwargs.get('slug'))
def base_gallery(request):
pictures = Picture.objects.all()
paginator = Paginator(pictures, 16)
page = request.GET.get('page')
pictures = paginator.get_page(page)
return render(request, 'core/base_gallery.html', {'pictures': pictures})
class PictureList(generic.ListView):
queryset = Picture.objects.all().order_by('-created_date')
template_name = 'base_gallery.html'
def contact(request):
return render(request, 'core/contact.html', {'contact': contact})
"config/urls"
from django.shortcuts import render
from .models import Post, Subcategory, Picture
from django.core.paginator import Paginator
from django.views import generic
def base(request):
return render(request, 'core/base.html')
def home(request):
posts = Post.objects.all()
paginator = Paginator(posts, 5)
page = request.GET.get('page')
posts = paginator.get_page(page)
return render(request, 'core/home.html', {'posts': posts})
class PostList(generic.ListView):
model = Post
queryset = Post.objects.all().order_by('-created_date')
template_name = 'home.html'
def post_detail(request, slug=None):
post = Post.objects.get(slug=slug)
return render(request, 'core/post_detail.html', {'post': post})
class PostDetail(generic.DetailView):
model = Post
template_name = 'post_detail.html'
def post_subcategory(request):
subcategories = Subcategory.objects.all()
paginator = Paginator(subcategories, 5)
page = request.GET.get('page')
subcategories = paginator.get_page(page)
return render(request, 'core/post_subcategory.html', {'subcategories': subcategories})
class SubcategoryDetailView(generic.DetailView):
model = Subcategory
context_object_name = 'subcategory'
template_name = 'core/post_subcategory.html'
def get_queryset(self):
return Post.objects.filter(subcategory_id=self.kwargs.get('slug'))
def base_gallery(request):
pictures = Picture.objects.all()
paginator = Paginator(pictures, 16)
page = request.GET.get('page')
pictures = paginator.get_page(page)
return render(request, 'core/base_gallery.html', {'pictures': pictures})
class PictureList(generic.ListView):
queryset = Picture.objects.all().order_by('-created_date')
template_name = 'base_gallery.html'
def contact(request):
return render(request, 'core/contact.html', {'contact': contact})
"app/urls":
from django.contrib import admin
from django.urls import path, include
from django.conf import settings
from django.conf.urls.static import static
import core.views
urlpatterns = [
path('admin/', admin.site.urls),
path('core/', include('core.urls')),
path('ckeditor/', include('ckeditor_uploader.urls')),
path('', core.views.home, name='home'),
path('', core.views.base, name='base'),
path('post_subcategory', core.views.post_subcategory, name='post_subcategory'),
path('post_detail', core.views.post_detail, name='post_detail'),
path('base_gallery', core.views.base_gallery, name='base_gallery'),
path('contact', core.views.contact, name='contact')
] + static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)
"post_category.html":
{% extends "core/base.html" %}
{% block content %}
{% load static %}
<div class="category-title">
<h1>HOW TO</h1>
</div>
{% for subcategory in subcategories %}
{% for post in subcategory.post_set.all %}
<h1>{{ post.title }}</h1>
<div class="category-content">
<figure class="gallery-picture">
<h1 class="picture-text"></h1>
<img src="{{ post.image.url }}" alt="gallery image">
</figure>
</div>
{% endfor %}
{% endfor %}
{% endblock %}
This is what I've tried so far and I can display all the subcategories on that template but I don't know how to filter them one by one, if that makes any sense.
First, I think the data structure and your model relationships are not properly placed.
I think you should have a category model and a sub_category model too.
class Category(models.Model):
title = models.Charfield(...)
class SubCategory(models.Model):
category = models.ForiegnKey(on_delete=models.CASCADE)
title = models.Charfield(...)
By doing this, you wouldn't need the dictionary and you won't also need the category field on Post model so all have to query in your views.py is where post.sub_category.category == the requested category or where post.sub_cateogory == the requested sub_category.
Editing to show how to implement in views.py
class DIYCategoryList(generic.ListView):
template_name = 'blog/diy_category.html'
model = Post
context_object_name = 'diy_posts'
paginate_by = 16
def get_queryset(self):
return Post.objects.filter(sub_category.category.title='DIY')