【发布时间】：2021-10-01 04:34:22
【问题描述】：
我目前正在开发一个用 Django 制作的商店，但我遇到了一个问题，因为我有一个 Category 和 Subcategory 的模型。问题是我真的不知道自己做错了什么，因为在 html 文件中我尝试同时调用类别和子类别，但是在每个类别中都显示了所有子类别，而不是属于特定类别。我想寻求您的帮助，并检查以下文件是否正确写入。提前致谢
models.py
from django.db import models
from django.urls import reverse
# Class model for category
class Category(models.Model):
name = models.CharField(max_length=200,
db_index=True)
slug = models.SlugField(max_length=200,
db_index=True)
class Meta:
ordering = ('name',)
verbose_name = 'category'
verbose_name_plural = 'categories'
def __str__(self):
return self.name
def get_absolute_url(self):
return reverse('selcorshop:product_list_by_category',
args=[self.slug])
# Class model for subcategory
class Subcategory(models.Model):
category = models.ForeignKey(Category,
related_name='category',
on_delete=models.CASCADE)
name = models.CharField(max_length=200,
db_index=True)
slug = models.SlugField(max_length=200,
db_index=True)
class Meta:
ordering = ('name',)
verbose_name = 'subcategory'
verbose_name_plural = 'subcategories'
def __str__(self):
return self.name
def get_absolute_url(self):
return reverse('selcorshop:product_list_by_subcategory',
args=[self.slug])
# Class model for product
class Product(models.Model):
subcategory = models.ForeignKey(Subcategory,
related_name='products',
on_delete=models.CASCADE)
name = models.CharField(max_length=200, db_index=True)
slug = models.SlugField(max_length=200, db_index=True)
image = models.ImageField(upload_to='products/%Y/%m/%d',
blank=True)
description = models.TextField(blank=True)
price = models.DecimalField(max_digits=10, decimal_places=2)
available = models.BooleanField(default=True)
created = models.DateTimeField(auto_now_add=True)
updated = models.DateTimeField(auto_now=True)
class Meta:
ordering = ('name',)
index_together = (('id', 'slug'),)
def __str__(self):
return self.name
def get_absolute_url(self):
return reverse('selcorshop:product_detail',
args=[self.id, self.slug])
views.py
from django.shortcuts import render, get_object_or_404
from .models import Category, Subcategory, Product
from cart.forms import CartAddProductForm
# View for product list in site
def product_list(request, category_slug=None, subcategory_slug=None):
category = None
categories = Category.objects.all()
subcategory = None
subcategories = Subcategory.objects.all()
products = Product.objects.filter(available=True)
if category_slug:
category = get_object_or_404(Category, slug=category_slug)
subcategory = get_object_or_404(Subcategory, slug=subcategory_slug)
products = products.filter(category=category)
return render(request,
'selcorshop/product/list.html',
{'category': category,
'categories': categories,
'subcategory': subcategory,
'subcategories': subcategories,
'products': products})
# View for single product
def product_detail(request, id, slug):
product = get_object_or_404(Product,
id = id,
slug = slug,
available = True)
# Add to cart button
cart_product_form = CartAddProductForm()
return render(request,
'selcorshop/product/detail.html',
{'product': product,
'cart_product_form': cart_product_form})
urls.py
from django.urls import path
from . import views
from django.conf import settings
from django.conf.urls.static import static
app_name = 'selcorshop'
urlpatterns =[
path('', views.product_list, name='product_list'),
path('<slug:category_slug>/', views.product_list, name='product_list_by_category'),
path('<slug:subcategory_slug>/', views.product_list, name='product_list_by_subcategory'),
path('<int:id>/<slug:slug>/', views.product_detail, name='product_detail'),
]
if settings.DEBUG:
urlpatterns += static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)
list.html
{% extends "selcorshop/base.html" %}
{% load static %}
{% block title %}
{% if category %}{{ category.name }}{% else %}Produkty{% endif %}
{% endblock %}
{% block content %}
<div class="row">
<div id="sidebar" class="col-2">
<div class="d-flex flex-column flex-shrink-0 p-3 text-white bg-dark" style="width: 280px;">
<a href="/" class="d-flex align-items-center mb-3 mb-md-0 me-md-auto text-white text-decoration-none">
<svg xmlns="http://www.w3.org/2000/svg" width="40" height="32" fill="currentColor" class="bi bi-list" viewBox="0 0 16 16">
<path fill-rule="evenodd" d="M2.5 12a.5.5 0 0 1 .5-.5h10a.5.5 0 0 1 0 1H3a.5.5 0 0 1-.5-.5zm0-4a.5.5 0 0 1 .5-.5h10a.5.5 0 0 1 0 1H3a.5.5 0 0 1-.5-.5zm0-4a.5.5 0 0 1 .5-.5h10a.5.5 0 0 1 0 1H3a.5.5 0 0 1-.5-.5z"/>
</svg>
<span class="fs-4">Kategorie</span>
</a>
<hr>
<ul class="nav nav-pills flex-column mb-auto">
<li {% if not category %}class="nav-item" {% endif %}>
<a href="{% url 'selcorshop:product_list' %}" class="nav-link active bg-success" aria-current="page">Wszystkie</a>
</li>
<div class="dropdown">
**{% for c in categories %}
<button class="btn btn-secondary dropdown-toggle" type="button" id="dropdownMenuButton" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
<li {% if category.slug == c.slug %} {% endif %}>
<a href="{{ c.get_absolute_url }}" class="nav-link text-white">{{ c.name }}</a>
</li>
</button>
<div class="dropdown-menu" aria-labelledby="dropdownMenuButton">
{% for s in subcategories %}
<a class="dropdown-item" href="#">
<li {% if subcategory.slug == s.slug %} {% endif %}>
<a href="{{ s.get_absolute_url }}" class="nav-link text-black">{{ s.name }}</a>
</li>
</a>
{% endfor %}
</div>
{% endfor %}**
</div>
</ul>
<!-- <ul class="nav nav-pills flex-column mb-auto">-->
<!-- <li {% if not category %}class="nav-item" {% endif %}>-->
<!-- <a href="{% url 'selcorshop:product_list' %}" class="nav-link active" aria-current="page">Wszystkie</a>-->
<!-- </li>-->
<!-- {% for c in categories %}-->
<!-- <li {% if category.slug == c.slug %} {% endif %}>-->
<!-- <a href="{{ c.get_absolute_url }}" class="nav-link text-white">{{ c.name }}</a>-->
<!-- </li>-->
<!-- {% endfor %}-->
<!-- </ul>-->
</div>
</div>
<div id="main" class="product_list col-10">
<h2>{% if category %}{{ category.name }}{% else %}Produkty{% endif %}</h2>
{% for product in products %}
<div class="item">
<a href="{{ product.get_absolute_url }}">
<img src="{% if product.image %}{{ product.image.url }}{% else %}{% static 'img/no_image.png' %}{% endif %}" alt="Obraz">
</a>
<a href="{{ product.get_absolute_url }}">{{ product.name }}</a><br>
{{ product.price }} zł.
</div>
{% endfor %}
</div>
</div>
{% endblock %}
【问题讨论】：
-
{% for s in c.category.all %}但您应该更改 SubCategory 中的相关名称，因为它读起来有点混乱。 -
请修剪您的代码，以便更容易找到您的问题。请按照以下指南创建minimal reproducible example。