基于本教程https://www.youtube.com/watch?v=An4hW4TjKhE&ab_channel=AbhishekVerma 我正在尝试添加在帖子下添加评论的功能，在管理面板中添加评论，一切正常，但该网站在帖子下不显示任何内容
这里是models.py
from django.db import models
from django.urls import reverse
from django.contrib.auth.models import User
from django.contrib.contenttypes.models import ContentType
class Post(models.Model):
published = None
title = models.CharField(max_length=200)
author = models.ForeignKey(
'auth.User',
on_delete=models.CASCADE,
)
body = models.TextField()
header_image = models.ImageField(blank=True, null=True, upload_to="images/", default='fox.jpeg')
def __str__(self):
return self.title
def get_absolute_url(self):
return reverse('post_detail', args=[str(self.id)])
class Comment(models.Model):
post = models.ForeignKey(Post, on_delete=models.CASCADE, related_name='post_post')
user = models.ForeignKey(User, on_delete=models.CASCADE, related_name='user_user')
content = models.TextField(max_length=160)
timestamp = models.DateTimeField(auto_now_add=True)
def __str__(self):
return '{}-{}'.format(self.post.title, str(self.user.username))
views.py
from django.http import HttpResponseRedirect
from django.shortcuts import render, get_object_or_404
from django.views.generic import ListView, DetailView
from django.views.generic.edit import CreateView, UpdateView, DeleteView
from django.urls import reverse_lazy
from .models import Post, Comment
from django import forms
from .forms import *
class BlogListView(ListView):
model = Post
template_name = 'home.html'
context_object_name = 'posts'
paginate_by = 2
queryset = Post.objects.all()
class BlogDetailView(DetailView):
model = Post
template_name = 'post_detail.html'
class BlogCreateView(CreateView):
model = Post
template_name = 'post_new.html'
fields = ['title', 'author', 'body', 'header_image']
class BlogUpdateView(UpdateView):
model = Post
template_name = 'post_edit.html'
fields = ['title', 'body', 'header_image']
class BlogDeleteView(DeleteView):
model = Post
template_name = 'post_delete.html'
success_url = reverse_lazy('home')
@property
def image_url(self):
"""
Return self.photo.url if self.photo is not None,
'url' exist and has a value, else, return None.
"""
if self.image:
return getattr(self.photo, 'url', None)
return None
def post_detail(request, id, slug):
post = get_object_or_404(Post, id=id, slug=slug)
comments = Comment.objects.filter(post=post).order_by('-id')
is_liked = False
if post.likes.filter(id=request.user.id).exists():
is_liked = True
if request.method == 'POST':
comment_form = CommentForm(request.POST or None)
if comment_form.is_valid():
content = request.POST.get('content')
comment = Comment.objects.create(post=post, user=request.user, content=content)
comment.save()
return HttpResponseRedirect(post.get_absolute_url())
else:
comment_form = CommentForm()
context = {
'post': post,
'is_liked': is_liked,
'total_likes': post.total_likes(),
'comments': comments,
'comment_form': comment_form,
}
return render(request, 'myblog/post_detail.html', context) #his "blog" = my "myblog"
class CommentForm(forms.ModelForm):
class Meta:
model = Comment
fields = ('content',)
post_detail.html
{% extends 'base.html' %}
{% block content %}
<div class="post-entry">
<h2>{{ post.title }}</h2>
<p>{{ post.body }}</p>
</div>
<p><a href="{% url 'post_edit' post.pk %}">+ Edit Blog Post</a></p>
<p><a href="{% url 'post_delete' post.pk %}">+ Delete Blog Post</a></p>
<img src="{{ post.header_image.url|default_if_none:'fox.jpeg' }}">
{{ post.body|urlize }}
{% for comm in post.commentpost_set.all%}
{{ comm.user }} <br>
{{ comm.text }} <br><br>
{% endfor %}
{% endblock content %}
<br><br>
<hr>
<form method="post">
{% csrf_token %}
{{ comment_form.as_p }}
{% if request.user.is_authenticated %}
<input type="submit" value="Submit" class="btn btn-outline-success">
{% else %}
<input type="submit" value="Submit" class="btn btn-outline-success" disabled>
{% endif %}
</form>
<div class="main-comment-section">
{{ comments.count }} Comment{{ comments|pluralize }}
{% for comment in comments %}
<blockquote class="blockquote">
<p class="mb-0">{{ comment.content }}</p>
<footer class="blockquote-footer">by <cite title="Source Title">{{ comment.user|capfirst }}</cite></footer>
</blockquote>
{% endfor %}
</div>
myblog/urls.py
from django.urls import path
from .views import (
BlogListView,
BlogDetailView,
BlogCreateView,
BlogUpdateView,
BlogDeleteView,
)
urlpatterns = [
path('post/new/', BlogCreateView.as_view(), name='post_new'),
path('post/<int:pk>/', BlogDetailView.as_view(), name='post_detail'),
path('post/<int:pk>/edit/',BlogUpdateView.as_view(), name='post_edit'),
path('post/<int:pk>/delete/',BlogDeleteView.as_view(), name='post_delete'),
path('', BlogListView.as_view(), name='home'),
]
base.html
{% load static %}
<html>
<head>
<title>Django blog</title>
<link href="https://fonts.googleapis.com/css?family=Source+Sans+Pro:400"
rel="stylesheet">
<link href="{% static 'css/base.css' %}" rel="stylesheet">
</head>
<body>
<div>
<header>
<div class="nav-left">
<h1><a href="{% url 'home' %}">Django blog</a></h1>
<h2><a href="http://127.0.0.1:8000/admin/">Admin</a></h2>
</div>
<div class="nav-right">
<a href="{% url 'post_new' %}">+ New Blog Post</a>
</div>
</header>
{% if user.is_authenticated %}
<p>Hi {{ user.username }}!</p>
{% else %}
<p>You are not logged in.</p>
<a href="{% url 'login' %}">Log In</a><br>
<p><a href="http://127.0.0.1:8000/accounts/signup/">Sign up</a></p>
{% endif %}
{% block content %}
{% endblock content %}
</div>
</body>
</html>
<ul class="pagination">
{% if page_obj.has_previous %}
{% if page_obj.number|add:'-3' > 1 %}
<li class="pagination__item">
<a href="?{{ post }}{{ post }}page=1">1</a>
</li>
{% endif %}
{% if page_obj.number|add:'-3' >= 3 %}
<li class="pagination__item pagination__item--dots">
<a href="?{{ genre }}{{ year }}page={{ page_obj.previous_page_number|add:'-3' }}">
<span class="pagination__link">• • •</span>
</a>
</li>
{% endif %}
{% endif %}
{% if paginator.page_range|length > 1 %}
{% for i in paginator.page_range %}
{% if page_obj.number == i %}
<li class="pagination__item active">
<a class="pagination__link" href="#">{{ i }}</a>
</li>
{% elif i > page_obj.number|add:'-4' and i < page_obj.number|add:'4' %}
<li class="pagination__item">
<a class="pagination__link" href="?{{ genre }}{{ year }}page={{ i }}">{{ i }}</a>
</li>
{% endif %}
{% endfor %}
{% endif %}
{% if page_obj.has_next %}
{% if page_obj.number|add:'4' < page_obj.paginator.num_pages %}
<li class="pagination__item pagination__item--dots">
<a href="?{{ genre }}{{ year }}page={{ page_obj.next_page_number|add:'3' }}">
<span class="pagination__link">• • •</span>
</a>
</li>
{% endif %}
{% if page_obj.number|add:'3' < page_obj.paginator.num_pages %}
<li class="pagination__item">
<a class="pagination__link" href="?{{ genre }}{{ year }}page={{ page_obj.paginator.num_pages }}">
{{ page_obj.paginator.num_pages }}
</a>
</li>
{% endif %}
{% endif %}
</ul>
感谢您的帮助
答案 0 :(得分：1)
您的 post_detail.html 扩展了 base.html，因此您希望呈现的任何内容必须在某个块内，并且该块也必须出现在父模板（此处为 base.html）。您目前有一些内容在任何块之外，因此它们不会被渲染。将 HTML 放入块中，它会显示出来：
{% extends 'base.html' %}
{% block content %}
<div class="post-entry">
<h2>{{ post.title }}</h2>
<p>{{ post.body }}</p>
</div>
<p><a href="{% url 'post_edit' post.pk %}">+ Edit Blog Post</a></p>
<p><a href="{% url 'post_delete' post.pk %}">+ Delete Blog Post</a></p>
<img src="{{ post.header_image.url|default_if_none:'fox.jpeg' }}">
{{ post.body|urlize }}
{% for comm in post.commentpost_set.all%}
{{ comm.user }} <br>
{{ comm.text }} <br><br>
{% endfor %}
<!-- put them inside the block -->
<br><br>
<hr>
<form method="post">
{% csrf_token %}
{{ comment_form.as_p }}
{% if request.user.is_authenticated %}
<input type="submit" value="Submit" class="btn btn-outline-success">
{% else %}
<input type="submit" value="Submit" class="btn btn-outline-success" disabled>
{% endif %}
</form>
<div class="main-comment-section">
{{ comments.count }} Comment{{ comments|pluralize }}
{% for comment in comments %}
<blockquote class="blockquote">
<p class="mb-0">{{ comment.content }}</p>
<footer class="blockquote-footer">by <cite title="Source Title">{{ comment.user|capfirst }}</cite></footer>
</blockquote>
{% endfor %}
</div>
{% endblock content %}