如何从django模型中选择特定对象并使用它检索url？(CS50项目2)
如何从django模型中选择特定对象并使用它检索url？(CS50项目2)
提问于 2022-05-15 22:03:43
我正在执行CS50项目2，并有一个名为list的django模型，其中有一个名为an的对象，用户可以使用下拉列表来选择这个对象。所有类别都列在类别页面上，需要链接到显示该类别中所有列表的categories_page页面。您能帮助我使用类别页面的href和变量链接到categories_page页面吗？
类别views.py
def categories(request):
return render(request, "auctions/categories.html",{
"Miscellaneous": Listings.objects.all().filter(category=Miscellaneous)
})categories.html (我需要将这个页面上的所有类别链接到它们自己的categories_page)。
{% block body %}
<h1>Categories</h1>
<a href="{% url 'categories' Miscellaneous.category %}" style = "color: rgb(58, 58, 58);"><h5>Miscellaneous</h5></a>
<h5>Movies and Television</h5>
<h5>Sports</h5>
<h5>Arts and Crafts</h5>
<h5>Clothing</h5>
<h5>Books</h5>
{% endblock %}categories_page views.py
def categories_page(request, category):
listings = Listings.objects.all().filter(category=category)
return render(request, "auctions/categories_page.html",{
"listings": listings,
"heading": category
})categories_page.html
{% block body %}
<h1>{{ heading }}</h1>
{% for listing in listings %}
<a href="{% url 'listing' listing.id %}" style = "color: rgb(58, 58, 58);">
<img src ="{{ listing.image }}" style = "height: 10%; width: 10%;">
<h4 class = "text">{{ listing.title }}</h4>
<h6>Description: {{ listing.description }}</h6>
<h6>Category: {{ listing.category }}</h6>
<h6>Price: ${{ listing.bid }}</h6>
</a>
{% endfor %}
{% endblock %categories_page视图和html都可以工作。我在类别视图和html上有问题。
如果你需要更多的代码，请告诉我。非常感谢!
urls.py
from django.urls import path
from .models import User, Listings
from .forms import ListingsForm
from . import views
urlpatterns = [
path("", views.index, name="index"),
path("login", views.login_view, name="login"),
path("logout", views.logout_view, name="logout"),
path("create", views.create, name="create"),
path("watchlist", views.watchlist, name="watchlist"),
path("categories", views.categories, name = "categories"),
path("categories/<str:category>/", views.categories_page, name = "categories_page"),
path("listing/<int:id>/", views.listing, name = "listing"),
path("register", views.register, name="register")
]models.py
class Listings(models.Model):
CATEGORY = [
("Miscellaneous", "Miscellaneous"),
("Movies and Television", "Movies and Television"),
("Sports", "Sports"),
("Arts and Crafts", "Arts and Crafts"),
("Clothing", "Clothing"),
("Books", "Books"),
]
title = models.CharField(max_length=64)
description = models.CharField(max_length=500)
bid = models.DecimalField(max_digits=1000000000000, decimal_places=2)
image = models.URLField(null=True, blank=True)
category = models.CharField(max_length=64, choices=CATEGORY, default=None)回答 1
Stack Overflow用户
回答已采纳
发布于 2022-05-17 14:01:29
实际上，没有必要尝试从模型中获取分类对象。这个密码对我有用。
category.views
def categories(request):
return render(request, "auctions/categories.html")categories.html
<a href="{% url 'categories_page' 'Miscellaneous' %}" style = "color: rgb(58, 58, 58);"><h5>Miscellaneous</h5></a>
<a href="{% url 'categories_page' 'Movies and Television' %}" style = "color: rgb(58, 58, 58);"><h5>Movies and Television</h5></a>
<a href="{% url 'categories_page' 'Sports' %}" style = "color: rgb(58, 58, 58);"><h5>Sports</h5></a>
<a href="{% url 'categories_page' 'Arts and Crafts' %}" style = "color: rgb(58, 58, 58);"><h5>Arts and Crafts</h5></a>
<a href="{% url 'categories_page' 'Clothing' %}" style = "color: rgb(58, 58, 58);"><h5>Clothing</h5></a>
<a href="{% url 'categories_page' 'Books' %}" style = "color: rgb(58, 58, 58);"><h5>Books</h5></a>您所要做的就是将url的名称放在您想要的参数的名称上。
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原文链接：
https://stackoverflow.com/questions/72252521
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