如何在Django模板中顯示鏈接到帶注釋的查詢集的views.py變量？

Question

如何在Django模板中顯示鏈接到帶注釋的查詢集的views.py變量？ 我知道帶注釋的查詢集在打印出來時會返回正確的數據，但是以某種方式，循環模板無法在html頁面上檢索數據。 有人可以建議我如何解決此問題嗎？ 謝謝。

觀點

from django.shortcuts import render
from django.views.generic import (TemplateView,ListView,
                              DetailView,CreateView,
                              UpdateView,DeleteView)
from django.urls import reverse_lazy
from myapp.models import Pastry
from myapp.forms import PastryForm
from django.db.models import F

這行ps = Pastry.objects.values('pastry').annotate(total=Count('pastry'))返回正確的數據：

{'pastry': 'Brownie', 'total': 1}
{'pastry': 'Cake', 'total': 1}
{'pastry': 'Cupcake', 'total': 1}
{'pastry': 'Fruit Tart', 'total': 1}
{'pastry': 'Muffin', 'total': 2}


class PollsListView(ListView):
    model = Pastry

    def get_queryset(self):
        return Pastry.objects.all()

class PollsDetailView(DetailView):
    model = Pastry

class PollsCreateView(CreateView):
    success_url = reverse_lazy('pastry_list')
    form_class = PastryForm
    model = Pastry

class PollsUpdateView(UpdateView):
    success_url = reverse_lazy('pastry_list')
    form_class = PastryForm
    model = Pastry

class PollsDeleteView(DeleteView):
    model = Pastry
    success_url = reverse_lazy('pastry_list')

pastry_list.html（模板）

{% extends "base.html" %}
{% block content %}
<div class="jumbotron">

<a href="{% url 'pastry_new' %}">New Poll</a>
<h1>Voting for the favorite pastry</h1>

Somehow this code here is not displaying any data.
{% for p in ps %}
 {% for k, v in p.items %}
   {{k}}{{v}}
 {% endfor %}
{% endfor %}

{% for pastry in pastry_list %}
    <div class="pastry">
        <h3><a href="{% url 'pastry_detail' pk=pastry.pk %}">
  {{ pastry.pastry }}</a></h3>
    </div>
  {% endfor %}

 </div>

 {% endblock %}

Answer 1

可以在文檔中找到更多信息
基本上，您可以通過get_context_data()方法將更多變量發送到模板

樣品：

class PollsListView(ListView):
    model = Pastry

    def get_queryset(self):
        return Pastry.objects.all()

    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)
        context['ps'] =  = Pastry.objects.values('pastry').annotate(total=Count('pastry'))
        return context

使用get_context-data() ，您的變量ps在模板pastry_list.html可用