Django上下文处理器的问题

Question

Context processor does not work when href inside templates redirect to details

context_processor.py

 from .models import Category def polls_category(request): for e in Category.objects.all(): name=e.title return {"polls_category":name} 

Context_processor in settings.py

  'OPTIONS': { 'context_processors': [ 'django.template.context_processors.debug', 'django.template.context_processors.request', 'django.contrib.auth.context_processors.auth', 'django.contrib.messages.context_processors.messages', 'products.context_processors.polls_category' ], }, 

Template

 {% for obj in gili_list %} <p><small><a href='{{obj.get_absolute_url}}'>{{polls_category}}</a></small></p> {% endfor %} 

views.py

 class CategoryListView(ListView): model = Category template_name = "products/product_list.html" def get_context_data(self, *args, **kwargs): context = super(CategoryListView, self).get_context_data(*args, **kwargs) context['gili_list'] = Category.objects.all() return context 

models.py

 class Category(models.Model): title = models.CharField(max_length=120, unique=True) slug = models.SlugField(unique=True) description = models.TextField(null=True, blank=True) active = models.BooleanField(default=True) timestamp = models.DateTimeField(auto_now_add=True, auto_now=False) 

Answer 1

First, change your view in views.py to remove the get_context_data method, if you are using a context processor to put context in your navbar, you do not need this extra context. Then add a detail view as below (I am assuming your detail template will be called "product_detail.html"). You will need to import 'DetailView' if you haven't already:

views.py

from django.views.generic import ListView, DetailView

class CategoryListView(ListView):
    model = Category
    template_name = "products/product_list.html"

class CategoryDetailView(DetailView):
    template_name = 'products/product_detail.html'
    model = Category
    context_object_name = 'category'

Secondly, change your template, remove 'gili_list' and replace with 'polls_catagory', which is context coming from your context_processors.py, as below:

product_list.html

{% for obj in polls_category %}

<p><small><a href='{{obj.get_absolute_url}}'>{{ obj.title }}</a></small></p>

{% endfor %}

Thirdly, modify your models.py with a 'get_absolute_url' method. I've also added an ' str ' method to make it look better in Django admin. Make sure you import 'reverse':

models.py

from django.db import models
from django.urls import reverse

class Category(models.Model):
title = models.CharField(max_length=120, unique=True)
slug = models.SlugField(unique=True)
description = models.TextField(null=True, blank=True)
active = models.BooleanField(default=True)
timestamp = models.DateTimeField(auto_now_add=True, auto_now=False)

def get_absolute_url(self):
    return reverse('category_detail', kwargs={'slug': self.slug})

def __str__(self):
    return f'{self.title}'

Fourthly: Your context processor is now doing something, it is supplying polls_category to every page, and hence to your navbar:

context_processors.py

def polls_category(request):
    polls_category = Category.objects.all()
    return {"polls_category": polls_category} 

Fifthly, in the detail template, add in this to check the context is coming through:

product_detail.html

{{ category.title }} <br>
{{ category.active }}

This is all working perfectly at my end. Getting the correct object in your product_detail.html is done via the slug in the url, plus "Django magic".