我对评论功能的理解：
————————（1）数据库建一个评论的表
————————（2）前端建一个提交评论的form表单
————————（3）表单提交评论内容后写入到数据库评论表中
————————（4）将评论表的数据取出来展示到前端评论列表中
1、项目目录结构
2、路由
（1）总路由：
from django.contrib import admin
from django.urls import path,include
urlpatterns = [
path(‘admin/‘, admin.site.urls),
path(‘blog/‘,include(‘blog.urls‘))
]
（2）app路由：
from django.urls import path,re_path
from blog import views
urlpatterns = [
path(‘‘,views.index),
re_path(‘article_detail/(\d+)‘,views.article_detail) # 传入文章ID参数
]
3、模型
from django.db import models
from django.contrib.auth.models import User
class Article(models.Model):
title = models.CharField(max_length=70,verbose_name=‘文章标题‘)
content = models.TextField(verbose_name=‘正文‘)
author = models.ForeignKey(to=User,on_delete=models.DO_NOTHING,verbose_name=‘作者‘)
created_time = models.DateTimeField(auto_now_add=True,verbose_name=‘发布时间‘)
class Meta:
db_table = ‘article‘
verbose_name = ‘文章‘
verbose_name_plural = verbose_name
class Comment(models.Model):
article = models.ForeignKey(to=Article,on_delete=models.DO_NOTHING,verbose_name=‘文章‘)
content = models.TextField(verbose_name=‘评论内容‘)
author = models.ForeignKey(User,on_delete=models.DO_NOTHING,verbose_name=‘评论者‘)
post_time = models.DateTimeField(auto_now_add=True,verbose_name=‘评论时间‘)
class Meta:
db_table = ‘comment‘
verbose_name = ‘评论‘
verbose_name_plural = verbose_name
4、视图函数
from django.shortcuts import render,HttpResponse,redirect
from django.core.paginator import Paginator
from blog.models import Article
from blog.models import Comment
def index(request):
all_article_list = Article.objects.all()
paginator = Paginator(all_article_list,10) #实例化分页器对象
page = int(request.GET.get(‘page‘,1)) #获取页码数
article_list_obj = paginator.page(page) #获取当前页的分页对象
article_list = article_list_obj.object_list #获取当前页的数据列表
context = {
‘article_list‘: article_list,
‘paginator‘: paginator,
‘article_list_obj‘: article_list_obj
}
return render(request,‘blog/index.html‘,context=context)
def article_detail(request,article_id):
if request.method == ‘GET‘:
article = Article.objects.get(id=article_id)
comment_list = Comment.objects.filter(article_id=article.id)
context = {
‘article‘: article,
‘request‘: request,
‘comment_list‘: comment_list
}
return render(request,‘blog/article_detail.html‘,context=context)
else:
c_id = article_id
c_author = request.user.id
c_content = request.POST.get(‘content‘)
Comment.objects.create(content=c_content,article_id=c_id,author_id=c_author)
return redirect(‘/blog/article_detail/{}/‘.format(c_id))
5、模板HTML
（1）base.html
<!doctype html>
<html lang="zh-CN">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<!-- The above 3 meta tags *must* come first in the head; any other head content must come *after* these tags -->
<meta name="description" content="">
<meta name="author" content="">
<link rel="icon" href="https://cdn.jsdelivr.net/npm/@bootcss/v3.bootcss.com@1.0.14/favicon.ico">
<link rel="canonical" href="https://getbootstrap.com/docs/3.4/examples/jumbotron/">
<title>{% block title %}{% endblock %}</title>
<!-- Bootstrap core CSS -->
<link href="https://cdn.jsdelivr.net/npm/@bootcss/v3.bootcss.com@1.0.14/dist/css/bootstrap.min.css" rel="stylesheet">
<!-- IE10 viewport hack for Surface/desktop Windows 8 bug -->
<link href="https://cdn.jsdelivr.net/npm/@bootcss/v3.bootcss.com@1.0.14/assets/css/ie10-viewport-bug-workaround.css" rel="stylesheet">
<!-- Custom styles for this template -->
<link href="https://cdn.jsdelivr.net/npm/@bootcss/v3.bootcss.com@1.0.14/examples/jumbotron/jumbotron.css" rel="stylesheet">
<!-- Just for debugging purposes. Don‘t actually copy these 2 lines! -->
<!--[if lt IE 9]><script src="https://cdn.jsdelivr.net/npm/@bootcss/v3.bootcss.com@1.0.14/assets/js/ie8-responsive-file-warning.js"></script><![endif]-->
<script src="https://cdn.jsdelivr.net/npm/@bootcss/v3.bootcss.com@1.0.14/assets/js/ie-emulation-modes-warning.js"></script>
<!-- HTML5 shim and Respond.js for IE8 support of HTML5 elements and media queries -->
<!--[if lt IE 9]>
<script src="https://oss.maxcdn.com/html5shiv/3.7.3/html5shiv.min.js"></script>
<script src="https://oss.maxcdn.com/respond/1.4.2/respond.min.js"></script>
<![endif]-->
</head>
<body>
<nav class="navbar navbar-inverse navbar-fixed-top">
<div class="container">
<div class="navbar-header">
<a class="navbar-brand" href="/blog/">博客首页</a>
</div>
<div id="navbar" class="navbar-collapse collapse">
<form class="navbar-form navbar-right">
<div class="form-group">
<input type="text" placeholder="Email" class="form-control">
</div>
<div class="form-group">
<input type="password" placeholder="Password" class="form-control">
</div>
<button type="submit" class="btn btn-success">登录</button>
</form>
</div><!--/.navbar-collapse -->
</div>
</nav>
<br>
{% block content %}
{% endblock %}
</body>
</html>
（2）首页index.html
{% extends ‘base.html‘ %}
{% block title %}
博客首页
{% endblock %}
{% block content %}
<div class="container">
<div class="row">
<div class="el-col-md-12">
<table class="table"> {# 文章列表 #}
<tr class="info">
<th>ID</th>
<th>标题</th>
<th>正文</th>
<th>正文</th>
<th>时间</th>
</tr>
{% for article in article_list %}
<tr class="active">
<td>{{ article.id }}</td>
<td><a href="/blog/article_detail/{{ article.id }}/">{{ article.title}}</a></td>
<td>{{ article.content|truncatechars:100}}</td>
<td>{{ article.created_time}}</td>
<td>{{ article.author.username}}</td>
</tr>
{% endfor %}
</table> {# 文章列表结束 #}
<div> {# 分页块 #}
<nav aria-label="Page navigation">
<ul class="pagination">
{% if article_list_obj.has_previous %}
<li>
<a href="/blog/?page={{ article_list_obj.previous_page_number }}" aria-label="Previous">
<span aria-hidden="true">?</span>
</a>
</li>
{% endif %}
{% for number in paginator.page_range %}
<li><a href="/blog/?page={{ number }}">{{ number }}</a></li>
{% endfor %}
{% if article_list_obj.has_next %}
<li>
<a href="/blog/?page={{ article_list_obj.next_page_number }}" aria-label="Next">
<span aria-hidden="true">?</span>
</a>
</li>
{% endif %}
</ul>
</nav>
</div> {# 分页块结束 #}
</div>
</div>
</div>
{% endblock %}
（3）文章详情article_detail.html
{% extends ‘base.html‘ %}
{% block title %}
文章详情
{% endblock %}
{% block content %}
<div class="container">
<div class="row">
<div class="col-md-12">
<div class="panel panel-primary"> {# 文章详情区域 #}
<div class="panel-body">
{{ article.title }}
</div>
<div class="panel-body">
{{ article.content }}
</div>
<div class="panel-footer">{{ article.author }} {{ article.created_time }}</div>
</div> {# 文章详情区域结束 #}
<div>
<hr>
<h4><b>评论</b></h4>
<form action="" method="post">
<textarea class="form-control" rows="3" name="content"></textarea>
<br>
<button type="submit" class="btn btn-primary">提交</button>
</form>
<hr>
<div class="panel panel-danger">
<div class="panel-body">评论列表</div>
<div>
{% for comment in comment_list %}
<div> {{ comment.content }}</div>
<div> {{ comment.post_time }} & {{ comment.author.username }}</div>
<hr>
{% endfor %}
</div>
</div>
</div>
</div>
</div>
</div>
{% endblock %}
6、效果
原文：https://www.cnblogs.com/zhangyh-blog/p/15228273.html