正在与一些代码作斗争。我见过很多人遇到过这个问题，但我似乎无法让他们的代码修复与我的代码修复一起工作(当然，要修改以适应我的项目(。我还是个新手。
我希望能够编辑product_list.html上产品列表中的产品。我创建了一个名为product_update.HTML的HTML页面，您可以在其中编辑产品，这很有效。但我想将product_list页面上的"编辑"链接指向该product_update页面。
我收到此错误：在/products/Reverse处找不到参数为"("，("的"product update"的NoReverseMatch。尝试了1个模式：['products/(？P[0-9]+(/edit/$']
这是我的代码：
视图.py
from django.http import Http404
from django.shortcuts import render, get_object_or_404, redirect
from django.views.generic import UpdateView
from .forms import ProductForm, RawProductForm
from .models import Product
def product_list_view(request):
queryset = Product.objects.all()
context = {
"object_list": queryset
}
return render(request, "products/product_list.html", context)
# ------------------------------------------------------------ #
class UpdateProductView(UpdateView):
model = Product
template_name = 'products/product_update.html'
fields = ['title', 'image', 'description', 'price', 'summary', 'featured']
product_list.html
{% extends 'base.html' %}
{% block content %}
{% for instance in object_list %}
<p>
{{ instance.id }} -
<a href="{{ instance.get_absolute_url }}">{{ instance.title }}</a>
|
<a href="{% url 'products:product-update' %}">(Edit)</a>
|
<!-- <a href="">Delete</a> -->
</p>
{% endfor %}
{% endblock %}
型号.py
from django.db import models
from django.urls import reverse
from PIL import Image
class Product(models.Model):
title = models.CharField(max_length=120) # max_length = required
image = models.ImageField(null=True, blank=True, upload_to="images/")
description = models.TextField(blank=True, null=True)
price = models.DecimalField(decimal_places=2, max_digits=10000)
summary = models.TextField(blank=True, null=False)
featured = models.BooleanField(default=False)
def get_absolute_url(self):
return reverse("products:product-detail", kwargs={"id": self.id})
# return f"products/{self.id}/"
def save(self, *args, **kwargs):
super().save(*args, **kwargs)
img = Image.open(self.image.path)
# if img.height > 300 or img.weight > 300:
# output_size = (300, 300)
# img.thumbnail(output_size)
# img.save(self.image.path)
urls.py
from django.contrib import admin
from django.urls import path
from products.views import (
product_detail_view,
product_create_view,
product_delete_view,
product_list_view,
dynamic_lookup_view,
UpdateProductView,
)
app_name = 'products'
urlpatterns = [
path('', product_list_view, name='product-list'),
path('', product_detail_view),
path('<int:id>/', dynamic_lookup_view, name='product-detail'),
path('<int:id>/delete/', product_delete_view, name='product-delete'),
path('create/', product_create_view),
path('<int:pk>/edit/', UpdateProductView.as_view(), name='product-update'),
]
追溯
Environment:
Request Method: GET
Request URL: http://127.0.0.1:8000/products/
Django Version: 3.1.3
Python Version: 3.9.0
Installed Applications:
['django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
'pages',
'products',
'blog',
'members']
Installed Middleware:
['django.middleware.security.SecurityMiddleware',
'django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.common.CommonMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
'django.middleware.clickjacking.XFrameOptionsMiddleware']
Template error:
In template /Users/alfiemitchell/Documents/Dev/tryDjango/src/templates/base.html, error at line 0
Reverse for 'product-update' with arguments '('',)' not found. 1 pattern(s) tried: ['products/(?P<pk>[0-9]+)/edit/$']
1 : <!doctype html>
2 : <html>
3 : <head>
4 : <title>Try Django</title>
5 : </head>
6 : <body>
7 : {% include 'navbar.html' %}
8 :
9 : {% block content %}
10 : {% endblock %}
Traceback (most recent call last):
File "/Users/alfiemitchell/Documents/Dev/tryDjango/venv/lib/python3.9/site-packages/django/core/handlers/exception.py", line 47, in inner
response = get_response(request)
File "/Users/alfiemitchell/Documents/Dev/tryDjango/venv/lib/python3.9/site-packages/django/core/handlers/base.py", line 179, in _get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/Users/alfiemitchell/Documents/Dev/tryDjango/src/products/views.py", line 82, in product_list_view
return render(request, "products/product_list.html", context)
File "/Users/alfiemitchell/Documents/Dev/tryDjango/venv/lib/python3.9/site-packages/django/shortcuts.py", line 19, in render
content = loader.render_to_string(template_name, context, request, using=using)
File "/Users/alfiemitchell/Documents/Dev/tryDjango/venv/lib/python3.9/site-packages/django/template/loader.py", line 62, in render_to_string
return template.render(context, request)
File "/Users/alfiemitchell/Documents/Dev/tryDjango/venv/lib/python3.9/site-packages/django/template/backends/django.py", line 61, in render
return self.template.render(context)
File "/Users/alfiemitchell/Documents/Dev/tryDjango/venv/lib/python3.9/site-packages/django/template/base.py", line 170, in render
return self._render(context)
File "/Users/alfiemitchell/Documents/Dev/tryDjango/venv/lib/python3.9/site-packages/django/template/base.py", line 162, in _render
return self.nodelist.render(context)
File "/Users/alfiemitchell/Documents/Dev/tryDjango/venv/lib/python3.9/site-packages/django/template/base.py", line 938, in render
bit = node.render_annotated(context)
File "/Users/alfiemitchell/Documents/Dev/tryDjango/venv/lib/python3.9/site-packages/django/template/base.py", line 905, in render_annotated
return self.render(context)
File "/Users/alfiemitchell/Documents/Dev/tryDjango/venv/lib/python3.9/site-packages/django/template/loader_tags.py", line 150, in render
return compiled_parent._render(context)
File "/Users/alfiemitchell/Documents/Dev/tryDjango/venv/lib/python3.9/site-packages/django/template/base.py", line 162, in _render
return self.nodelist.render(context)
File "/Users/alfiemitchell/Documents/Dev/tryDjango/venv/lib/python3.9/site-packages/django/template/base.py", line 938, in render
bit = node.render_annotated(context)
File "/Users/alfiemitchell/Documents/Dev/tryDjango/venv/lib/python3.9/site-packages/django/template/base.py", line 905, in render_annotated
return self.render(context)
File "/Users/alfiemitchell/Documents/Dev/tryDjango/venv/lib/python3.9/site-packages/django/template/loader_tags.py", line 62, in render
result = block.nodelist.render(context)
File "/Users/alfiemitchell/Documents/Dev/tryDjango/venv/lib/python3.9/site-packages/django/template/base.py", line 938, in render
bit = node.render_annotated(context)
File "/Users/alfiemitchell/Documents/Dev/tryDjango/venv/lib/python3.9/site-packages/django/template/base.py", line 905, in render_annotated
return self.render(context)
File "/Users/alfiemitchell/Documents/Dev/tryDjango/venv/lib/python3.9/site-packages/django/template/defaulttags.py", line 211, in render
nodelist.append(node.render_annotated(context))
File "/Users/alfiemitchell/Documents/Dev/tryDjango/venv/lib/python3.9/site-packages/django/template/base.py", line 905, in render_annotated
return self.render(context)
File "/Users/alfiemitchell/Documents/Dev/tryDjango/venv/lib/python3.9/site-packages/django/template/defaulttags.py", line 446, in render
url = reverse(view_name, args=args, kwargs=kwargs, current_app=current_app)
File "/Users/alfiemitchell/Documents/Dev/tryDjango/venv/lib/python3.9/site-packages/django/urls/base.py", line 87, in reverse
return iri_to_uri(resolver._reverse_with_prefix(view, prefix, *args, **kwargs))
File "/Users/alfiemitchell/Documents/Dev/tryDjango/venv/lib/python3.9/site-packages/django/urls/resolvers.py", line 685, in _reverse_with_prefix
raise NoReverseMatch(msg)
Exception Type: NoReverseMatch at /products/
Exception Value: Reverse for 'product-update' with arguments '('',)' not found. 1 pattern(s) tried: ['products/(?P<pk>[0-9]+)/edit/$']
您需要将主键作为更新视图的参数。如果按如下方式更改product-list.html文件，问题就会得到解决。
{% extends 'base.html' %}
{% block content %}
{% for instance in object_list %}
<p>
{{ instance.id }} -
<a href="{{ instance.get_absolute_url }}">{{ instance.title }}</a>
|
<a href="{% url 'products:product-update' instance.pk %}">(Edit)</a>
|
<!-- <a href="">Delete</a> -->
</p>
{% endfor %}
{% endblock %}