搭建自己的博客（二十三）：添加回复功能
接上一篇添加评论功能之后，增加回复的功能。
1、变化的部分
2、上代码
ul.blog-types,ul.blog-dates { list-style-type: none; } div.blog:not(:last-child) { margin-bottom: 2em; padding-bottom: 1em; border-bottom: 1px solid #eee; } div.blog h3 { margin-top: 0.5em; } div.blog-info p { margin-bottom: 0; } div.blog-info p span{ margin-right: 10px; } div.blog-info-description { list-style-type: none; margin-bottom: 1em; } ul.blog-info-description li { display: inline-block; margin-right: 1em; } div.paginator { text-align: center; } div.container { max-width: 80%; } div.comment-area{ margin-top: 2em; } h3.comment-area-title{ border-bottom: 1px solid #ccc; padding-bottom: 0.4em; } div.django-ckeditor-widget { width: 100%; } div.comment{ border-bottom: 1px dashed #ccc; margin-bottom: 0.5em; padding-bottom: 0.5em; } div.reply{ margin-left: 2em; }
{# 引用模板 #} {% extends 'base.html' %} {% load staticfiles %} {% block header_extends %} <link rel="stylesheet" href="{% static 'blog/blog.css' %}"> {# 处理公式 #} <script src='https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/MathJax.js?config=TeX-MML-AM_CHTML' async></script> <script type="text/javascript" src="{% static "ckeditor/ckeditor-init.js" %}"></script> <script type="text/javascript" src="{% static "ckeditor/ckeditor/ckeditor.js" %}"></script> {% endblock %} {# 标题 #} {% block title %} {{ blog.title }} {% endblock %} {# 内容#} {% block content %} <div class="container"> <div class="row"> <div class="col-10 offset-1"> <ul class="blog-info-description"> <h3>{{ blog.title }}</h3> <li>作者：{{ blog.author }}</li> {# 时间过滤器让时间按照自己需要的格式过滤 #} <li>发布日期：{{ blog.created_time|date:"Y-m-d H:i:s" }}</li> <li>分类： <a href="{% url 'blogs_with_type' blog.blog_type.pk %}"> {{ blog.blog_type }} </a> </li> <li>阅读({{ blog.get_read_num }})</li> </ul> <p class="blog-content">{{ blog.content|safe }}</p> <p>上一篇： {% if previous_blog %} <a href="{% url 'blog_detail' previous_blog.pk %}">{{ previous_blog.title }}</a> {% else %} <span>没有了</span> {% endif %} </p> <p>下一篇： {% if next_blog %} <a href="{% url 'blog_detail' next_blog.pk %}">{{ next_blog.title }}</a> {% else %} <span>没有了</span> {% endif %} </p> </div> </div> <div class="row"> <div class="col-10 offset-1"> <div class="comment-area"> <h3 class="comment-area-title">提交评论</h3> {% if user.is_authenticated %} <form id="comment-form" action="{% url 'update_comment' %}" method="post" style="overflow: hidden"> {% csrf_token %} <label for="form-control">{{ user.username }},欢迎评论～</label> <div id="reply-content-container" style="display: none;"> <p>回复：</p> <div id="reply-content"> </div> </div> {% for field in comment_form %} {{ field }} {% endfor %} <span id="comment-error" class="text-danger float-left"></span> <input type="submit" value="评论" class="btn btn-primary float-right"> </form> {% else %} 您尚未登录，登录之后方可评论 {# 提交登录的时候带上从哪里访问的路径 #} <a class="btn btn-primary" href="{% url 'login' %}?from={{ request.get_full_path }}">登录</a> <span> or </span> <a class="btn-danger btn" href="{% url 'register' %}?from={{ request.get_full_path }}">注册</a> {% endif %} </div> <div class="-comment-area"> <h3 class="comment-area-title">评论列表</h3> <div id="comment-list"> {% for comment in comments %} <div id="root-{{ comment.pk }}" class="comment"> <span>{{ comment.user.username }}</span> <span>{{ comment.comment_time|date:"Y-m-d H:i:s" }}</span> <div id="comment-{{ comment.pk }}">{{ comment.text|safe }}</div> <a href="javascript:reply({{ comment.pk }})">回复</a> {% for reply in comment.root_comment.all %} <div class="reply"> <span>{{ reply.user.username }}</span> <span>{{ reply.comment_time|date:"Y-m-d H:i:s" }}</span> <span>回复：</span><span>{{ reply.reply_to.username }}</span> <div id="comment-{{ reply.pk }}">{{ reply.text|safe }}</div> <a href="javascript:reply({{ reply.pk }})">回复</a> </div> {% endfor %} </div> {% empty %} <span id="no-comment">暂无评论</span> {% endfor %} </div> </div> </div> </div> </div> {% endblock %} {% block js %} <script> // 提交评论 $('#comment-form').submit(function () { // 获取错误框 let comment_error = $('#comment-error'); comment_error.text(''); // 更新数据到textarea CKEDITOR.instances['id_text'].updateElement(); let comment_text = CKEDITOR.instances['id_text'].document.getBody().getText().trim(); // 判断是否为空 if (!(CKEDITOR.instances['id_text'].document.getBody().find('img')['$'].length !== 0 || comment_text !== '')) { // 显示错误信息 comment_error.text('评论内容不能为空'); return false; } //异步提交 $.ajax({ url: "{% url 'update_comment' %}", type: 'POST', data: $(this).serialize(),// 序列化表单值 cache: false, // 关闭缓存 success: function (data) { let reply_comment = $('#reply_comment_id'); if (data['status'] === 'SUCCESS') { console.log(data); // 插入数据 // es6写法 if (reply_comment.val() === '0') { // 插入评论 let comment_html = `<div id="root-${data["pk"]}" class="comment"> <span>${data["username"]}</span> <span>${data["comment_time"]}</span> <div id="comment-${data["pk"]}">${data["text"]}</div> <a href="javascript:reply(${data["pk"]})">回复</a> </div>`; $('#comment-list').prepend(comment_html); } else { // 插入回复 let reply_html = `<div class="reply"> <span>${data["username"]}</span> <span>${data["comment_time"]}</span> <span>回复：</span><span>${data["reply_to"]}</span> <div id="comment-${data["pk"]}">${data["text"]}</div> <a href="javascript:reply(${data["pk"]})">回复</a> </div>`; $('#root-' + data['root_pk']).append(reply_html); } // 清空编辑框的内容 CKEDITOR.instances['id_text'].setData(''); $('#reply-content-container').hide(); // 回复完隐藏掉要回复的内容 reply_comment.val('0'); // 将回复标志重置0 $('#no-comment').remove(); // 如果有没回复标志，清除掉5 } else { // 显示错误信息 comment_error.text(data['message']) } }, error: function (xhr) { console.log(xhr); } }); return false; }); // 处理回复 function reply(reply_comment_id) { $('#reply_comment_id').val(reply_comment_id); let html = $('#comment-' + reply_comment_id).html(); $('#reply-content').html(html); $('#reply-content-container').show(); // 显示内容 // 滚动富文本编辑器 $('html').animate({scrollTop: $('#comment-form').offset().top - 60}, 300, function () { // 动画执行完毕后执行的方法 // 让富文本编辑器获得焦点 CKEDITOR.instances['id_text'].focus(); }); } </script> <script> $(".nav-blog").addClass("active").siblings().removeClass("active"); </script> {% endblock %}
from django.shortcuts import render, get_object_or_404 from django.contrib.contenttypes.models import ContentType from django.core.paginator import Paginator from django.conf import settings from django.db.models import Count from read_statistics.utils import read_statistics_once_read from .models import Blog, BlogType from comment.models import Comment from comment.forms import CommentForm # 分页部分公共代码 def blog_list_common_data(requests, blogs_all_list): paginator = Paginator(blogs_all_list, settings.EACH_PAGE_BLOGS_NUMBER) # 第一个参数是全部内容，第二个是每页多少 page_num = requests.GET.get('page', 1) # 获取url的页面参数（get请求） page_of_blogs = paginator.get_page(page_num) # 从分页器中获取指定页码的内容 current_page_num = page_of_blogs.number # 获取当前页 all_pages = paginator.num_pages if all_pages < 5: page_range = list( range(max(current_page_num - 2, 1), min(all_pages + 1, current_page_num + 3))) # 获取需要显示的页码 并且剔除不符合条件的页码 else: if current_page_num <= 2: page_range = range(1, 5 + 1) elif current_page_num >= all_pages - 2: page_range = range(all_pages - 4, paginator.num_pages + 1) else: page_range = list( range(max(current_page_num - 2, 1), min(all_pages + 1, current_page_num + 3))) # 获取需要显示的页码 并且剔除不符合条件的页码 blog_dates = Blog.objects.dates('created_time', 'month', order='DESC') blog_dates_dict = {} for blog_date in blog_dates: blog_count = Blog.objects.filter(created_time__year=blog_date.year, created_time__month=blog_date.month).count() blog_dates_dict = { blog_date: blog_count } return { 'blogs': page_of_blogs.object_list, 'page_of_blogs': page_of_blogs, 'blog_types': BlogType.objects.annotate(blog_count=Count('blog')), # 添加查询并添加字段 'page_range': page_range, 'blog_dates': blog_dates_dict } # 博客列表 def blog_list(requests): blogs_all_list = Blog.objects.all() # 获取全部博客 context = blog_list_common_data(requests, blogs_all_list) return render(requests, 'blog/blog_list.html', context) # 根据类型筛选 def blogs_with_type(requests, blog_type_pk): blog_type = get_object_or_404(BlogType, pk=blog_type_pk) blogs_all_list = Blog.objects.filter(blog_type=blog_type) # 获取全部博客 context = blog_list_common_data(requests, blogs_all_list) context['blog_type'] = blog_type return render(requests, 'blog/blog_with_type.html', context) # 根据日期筛选 def blogs_with_date(requests, year, month): blogs_all_list = Blog.objects.filter(created_time__year=year, created_time__month=month) # 获取全部博客 context = blog_list_common_data(requests, blogs_all_list) context['blogs_with_date'] = '{}年{}日'.format(year, month) return render(requests, 'blog/blog_with_date.html', context) # 博客详情 def blog_detail(requests, blog_pk): blog = get_object_or_404(Blog, pk=blog_pk) obj_key = read_statistics_once_read(requests, blog) blog_content_type = ContentType.objects.get_for_model(blog) comments = Comment.objects.filter(content_type=blog_content_type, object_id=blog.pk, parent=None) context = { 'blog': blog, 'previous_blog': Blog.objects.filter(created_time__gt=blog.created_time).last(), 'next_blog': Blog.objects.filter(created_time__lt=blog.created_time).first(), 'comments': comments.order_by('-comment_time'), # 评论内容 # 给form表单设置初始化值 'comment_form': CommentForm( initial={'content_type': blog_content_type.model, 'object_id': blog_pk, 'reply_comment_id': 0}), } response = render(requests, 'blog/blog_detail.html', context) response.set_cookie(obj_key, 'true') return response
# -*- coding: utf-8 -*- # @Time : 18-11-20 下午10:47 # @Author : Felix Wang from django import forms from django.contrib.contenttypes.models import ContentType from django.db.models import ObjectDoesNotExist from ckeditor.widgets import CKEditorWidget from .models import Comment class CommentForm(forms.Form): content_type = forms.CharField(widget=forms.HiddenInput) object_id = forms.IntegerField(widget=forms.HiddenInput) text = forms.CharField(widget=CKEditorWidget(config_name='comment_ckeditor'), error_messages={'required': '评论内容不能为空'}) reply_comment_id = forms.IntegerField(widget=forms.HiddenInput(attrs={'id': 'reply_comment_id'})) def __init__(self, *args, **kwargs): if 'user' in kwargs: self.user = kwargs.pop('user') super().__init__(*args, **kwargs) # 表单验证 def clean(self): # 判断用户是否登录 if self.user.is_authenticated: self.cleaned_data['user'] = self.user else: raise forms.ValidationError('用户尚未登录') content_type = self.cleaned_data['content_type'] object_id = self.cleaned_data['object_id'] try: model_class = ContentType.objects.get(model=content_type).model_class() model_obj = model_class.objects.get(pk=object_id) self.cleaned_data['content_object'] = model_obj except ObjectDoesNotExist as e: raise forms.ValidationError('评论对象不存在') return self.cleaned_data def clean_reply_comment_id(self): reply_comment_id = self.cleaned_data['reply_comment_id'] if reply_comment_id < 0: raise forms.ValidationError('回复出错') elif reply_comment_id == 0: self.cleaned_data['parent'] = None elif Comment.objects.filter(pk=reply_comment_id).exists(): self.cleaned_data['parent'] = Comment.objects.get(pk=reply_comment_id) else: raise forms.ValidationError('回复出错') return reply_comment_id
from django.db import models from django.contrib.contenttypes.models import ContentType from django.contrib.contenttypes.fields import GenericForeignKey from django.contrib.auth.models import User # Create your models here. class Comment(models.Model): content_type = models.ForeignKey(ContentType, on_delete=models.DO_NOTHING) object_id = models.PositiveIntegerField() content_object = GenericForeignKey('content_type', 'object_id') text = models.TextField() comment_time = models.DateTimeField(auto_now_add=True) user = models.ForeignKey(User, related_name='comments', on_delete=models.DO_NOTHING) root = models.ForeignKey('self', related_name='root_comment', null=True, on_delete=models.DO_NOTHING) # 两个外键关联同一个表时，通过related_name来解决冲突 parent = models.ForeignKey('self', related_name='parent_comment', null=True, on_delete=models.DO_NOTHING) reply_to = models.ForeignKey(User, related_name='replies', on_delete=models.DO_NOTHING, null=True) def __str__(self): return self.text class Meta: ordering = ['comment_time']
from django.http import JsonResponse from .models import Comment from .forms import CommentForm def update_commit(requests): comment_form = CommentForm(requests.POST, user=requests.user) if comment_form.is_valid(): comment = Comment() comment.user = comment_form.cleaned_data['user'] comment.text = comment_form.cleaned_data['text'] comment.content_object = comment_form.cleaned_data['content_object'] parent = comment_form.cleaned_data['parent'] if parent is not None: comment.root = parent.root if parent.root is not None else parent comment.parent = parent comment.reply_to = parent.user comment.save() # 返回数据 data = { 'status': 'SUCCESS', 'username': comment.user.username, 'comment_time': comment.comment_time.strftime('%Y-%m-%d %H:%M:%S'), 'text': comment.text.strip(), 'reply_to': comment.reply_to.username if parent is not None else '', 'pk': comment.pk, 'root_pk': comment.root.pk if comment.root is not None else '', } else: data = { 'status': 'ERROR', 'message': list(comment_form.errors.values())[0][0], } return JsonResponse(data)
