我正在 Django 中使用 JSON 代码制作一个“赞”按钮，但是当我单击“赞”按钮时，它不会增加此产品中的“赞”数量或传递“赞”(因为该猎人喜欢此产品)。我需要在 models.py 中创建一个单独的类，如果是的话，其中应该包含什么。或者是子弹没有以正确的方式设置。在 urls.py 和 models.py 中，我显示了所有代码，在views.py 中仅显示了“like”按钮和导入的方法，在detail.html 中仅显示了“like”按钮和JSON 脚本的HTML 标记。我正在与: Django 版本:2.2.9 Python版本:3.7.4。
应用程序“产品”中的 models.py:
from django.db import models
from django.contrib.auth.models import User
from django.template.defaultfilters import slugify
from django.urls import reverse
class Product(models.Model):
title = models.CharField(max_length = 80)
pub_date = models.DateTimeField()
body = models.TextField()
url = models.TextField()
image = models.ImageField(upload_to = 'images/')
icon = models.ImageField(upload_to = 'icon/')
votes_total = models.IntegerField(default=1)
slug = models.SlugField(null=False, unique=True)
likes = models.ManyToManyField(User, blank=True, related_name='likes')
hunter = models.ForeignKey(User, on_delete = models.CASCADE)
def __str__(self):
return self.title
def summary(self):
return self.body[:100] + "..."
def pub_date_pretty(self):
return self.pub_date.strftime("%b %e %Y")
def save(self, *args, **kwargs):
#if not self.slug:
#self.slug = slugify(self.title)
if not self.slug:
slug = slugify(self.title)
while True:
try:
product = Product.objects.get(slug=slug)
if article == self:
self.slug = slug
break
else:
slug = slug + '-'
except:
self.slug = slug
break
return super(Product, self).save(*args, **kwargs)
@property
def total_likes(self):
return self.likes.count()
应用程序“产品”中的views.py:
from django.http import HttpResponse
try:
from django.utils import simplejson as json
except ImportError:
import json
from django.shortcuts import render, redirect, get_object_or_404
from django.contrib.auth.decorators import login_required
from .models import Product
from django.contrib.auth.models import User
from django.utils import timezone
from django.views.decorators.http import require_POST
def home(request):
products = Product.objects
return render(request, 'products/home.html', {'products':products})
@login_required(login_url = '/accounts/signup')
def create(request):
if request.method == 'POST':
if request.POST['title'] and request.POST['body'] and request.POST['url'] and request.FILES['icon'] and request.FILES['image']:
product = Product()
product.title = request.POST['title']
product.body = request.POST['body']
if request.POST['url'].startswith('http://') or request.POST['url'].startswith('https://'):
product.url = request.POST['url']
else:
product.url = 'http://' + request.POST['url']
product.icon = request.FILES['icon']
product.image = request.FILES['image']
product.pub_date = timezone.datetime.now()
product.hunter = request.user
product.save()
return redirect('/products/' + str(product.id))
else:
return render(request, 'products/create.html', {'error':'All fields are required.'})
else:
return render(request, 'products/create.html')
def detail(request, product_id):
detail_product = get_object_or_404(Product, pk = product_id)
return render(request, 'products/detail.html', {'product' : detail_product})
@login_required(login_url = '/accounts/signup')
@require_POST
def like(request):
if request.method == 'POST':
hunter = request.user
slug = request.POST.get('slug', None)
product = get_object_or_404(Product, slug = slug)
if product.likes.filter(hunter_id = hunter.id).exists():
# user has already liked this company
# remove like/user
product.likes.remove(hunter)
message = 'You disliked this'
product.save()
else:
# add a new like for a company
product.likes.add(hunter)
message = 'You liked this'
product.save()
ctx = {'likes_count': product.total_likes, 'message': message}
# use mimetype instead of content_type if django < 5
return HttpResponse(json.dumps(ctx), content_type='application/json')
产品应用程序中的 urls.py:
from django.urls import path, include
from . import views
urlpatterns = [
path('create', views.create, name = 'create'),
path('<int:product_id>/', views.detail, name = 'detail'),
path('<int:product_id>/upvote', views.upvote, name = 'upvote'),
path('user/<int:fk>', views.hunterhunts, name = 'hunterhunts'),
path('<slug:slug>', views.like, name='like'),
]
“产品”应用中的 HTML 文件detail.html:
<input type="button" id="like" name="{{ product.slug }}" value="Like" />
<script>
$('#like').click(function() {
$.ajax({
type: "POST",
url: "{% url 'like' product.slug %}",
data: {
'slug': $(this).attr('name'),
'csrfmiddlewaretoken': '{{ csrf_token }}'
},
dataType: "json",
success: function(response) {
alert(response.message);
alert('Product likes count is now ' + response.likes_count);
},
error: function(rs, e) {
alert(rs.responseText);
}
});
});
</script>
知道应该纠正或添加哪些内容才能使“赞”按钮正常工作。
如果可以的话请说清楚!!!
最佳答案
$(this) inside of AJAX success not working
'slug': $(this).attr('name'),
我要么做 var self = this;在 ajax 或 $('#like').attr('name') 之前
product = get_object_or_404(Product, slug=slug)
if request.method == 'POST':
hunter = request.user
if product.likes.exists():
if product.likes.filter(username=hunter.username).exists():
product.likes.remove(hunter)
message = 'You disliked this'
product.save()
else:
product.likes.add(hunter)
message = 'You liked this'
product.save()
else:
product.likes.add(hunter)
message = 'You liked this'
product.save()
ctx = {'likes_count': product.total_likes, 'message': message}
return HttpResponse(json.dumps(ctx), content_type='application/json')```
关于python - Django Json 喜欢按钮和计数喜欢不起作用，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/59580425/