Django推荐相似文章

原文始发于：Django推荐相似文章

一 点睛

在发布文章时，给每篇文章都设置了文章标签，在这个功能的基础上，可以向阅读某篇文章的用户推荐与该文章相似的文章。有同样标签的文章应该是相似的，并且假设用户想阅读相似的文章，于是就有了推荐相似文章的开发需求。

二 编写视图函数mysite/article/list_views.py

# 没有登录的用户也可以访问这个函数 def article_detail(request, id, slug):     article = get_object_or_404(ArticlePost, id=id, slug=slug)     # total_views：记录文章访问量     # 一般通过“对象类型：对象ID：对象属性”来命名一个键     total_views = r.incr("article:{}:views".format(article.id))     # zincrby的原型是zincrby(name,amount,value):根据amount所设定的步长值增加有序集合（name）中的value的数值     # 实现了article_ranking中的article.id以步长1自增，     # 即文章访问一次，article_ranking就将文章id的值增1     r.zincrby('article_ranking', 1,article.id)     # 得到article_ranking中排序前10名对象     article_ranking = r.zrange('article_ranking', 0, -1, desc=True)[:10]      # 得到前10名文章ID     article_ranking_ids = [int(id) for id in article_ranking]      # 查询出id在article_ranking_ids这个范围内的所有文章对象，并以文章对象为元素生成列表     most_viewed = list(ArticlePost.objects.filter(id__in=article_ranking_ids))      # 对所得到的列表进行排序     most_viewed.sort(key=lambda x: article_ranking_ids.index(x.id))      if request.method == "POST":         comment_form = CommentForm(data=request.POST)         if comment_form.is_valid():             new_comment = comment_form.save(commit=False)             new_comment.article = article             new_comment.save()     else:         comment_form = CommentForm()      # 得到当前文章的所有标签在数据库表中的id     article_tags_ids = article.article_tag.values_list("id", flat=True)     # 得到所有与当前文章有共同文章标签的文章对象，并排除文章本身     similar_articles = ArticlePost.objects.filter(article_tag__in=article_tags_ids).exclude(id=article.id)     # 对于相似文章，根据与当前文章相同的标签数量进行标注，然后以相同标签数量和文章发布时间为关键词排序     similar_articles = similar_articles.annotate(same_tags=Count("article_tag")).order_by('-same_tags', '-created')[:4]      # 将访问次数传递给模板，将最受欢迎文章列表传递给前端     return render(request, "article/list/article_detail.html",                   {"article": article, "total_views": total_views,"most_viewed": most_viewed,"comment_form":comment_form,"similar_articles":similar_articles})

三 编写模板

{% extends "base.html" %} {% load staticfiles %} {% load article_tags %} {% block title %}{{ article.title }}{% endblock %} {% block content %} <!-- with发起一个赋值操作，它的结尾部分是endwith，total_likes分别为点赞用户总数，total_likes在 这两部分圈定的范围内有效--> {% with total_likes=article.users_like.count users_like=article.users_like.all %}  <div class="container">     <div class="col-md-9">         <header>             <h1>{{ article.title }}</h1>             <p>                 <a href="{% url 'article:author_articles' article.author.username %}">                     {{ article.author.username }}                 </a>                 <!-- pluralize的作用：如果total_likes为0或复数，则显示的是likes，如果total_likes为1，则显示like-->                 <span style="margin-left:20px" class="glyphicon glyphicon-thumbs-up">{{ total_likes }}like{{ total_likes | pluralize }}</span>                 <!-- 该文章总的访问此时-->                 <span style="margin-left: 20px">{{ total_views }}view{{ total_views | pluralize }}</span>             </p>             <!--标签功能-->             <p> <span style="margin-right: 10px"><strong>标签:</strong></span> {{ article.article_tag.all | join:", "}}</p>         </header>          <link rel="stylesheet" href="{% static 'editor/css/editormd.preview.css' %}"/>         <div id='editormd-view'>         <!--<textarea id="append-test" style="display:none;">--> <!--{{ article.body }}-->         <!--</textarea>--> <!--使用自定的过滤器markdown--> {{ article.body | markdown }}         </div>         <div>             <!--点赞功能实现-->             <p class="text-center">                 <a onclick="like_article({{article.id}}, 'like')" href="#"><span class="glyphicon glyphicon-thumbs-up">like</span></a>                 <a onclick="like_article({{article.id}}, 'unlike')" href="#"><span style="margin-left: 15px;"                                                                                    class="glyphicon glyphicon-thumbs-down">unlike</span></a>             </p>         </div>         <div>             <p class="text-center"><strong>点赞本文的读者</strong></p>             {% for user in article.users_like.all %}             <p class="text-center">{{ user.username }}</p>             {% empty %}             <p class="text-center">还没有人对此文章表态</p>             {% endfor %}         </div>         <!--以下是评论功能-->         <hr>         <div>             <h3><span class="glyphicon glyphicon-bullhorn"></span>本文有{{ article.comments.count }}评论</h3>             {% for comment in article.comments.all %}             <div>                 <p><strong>{{ comment.commentator }}</strong>说：</p>                 <p style="margin-left:40px;">{{ comment.body }}</p>             </div>             {% empty %}             <p>没有评论</p>             {% endfor %}              <h3><span class="glyphicon glyphicon-send"></span>看文章，发评论，不要沉默</h3>             <form action="." method="post" class="form-horizontal" role="form">{% csrf_token %}                 <div class="form-group">                     <label for="inputEmail3" class="col-sm-2 control-label">评论员</label>                     <div class="col-sm-10">                         {{ comment_form.commentator}}                     </div>                 </div>                 <div class="form-group">                     <label for="inputEmail3" class="col-sm-2 control-label">评论</label>                     <div class="col-sm-10">                         {{ comment_form.body }}                     </div>                 </div>                 <div class="form-group">                     <div class="col-sm-offset-2 col-sm-10">                         <p><input type="submit" name="" value="发评论" class="btn btn-primary"></p>                     </div>                 </div>             </form>         </div>     </div>     <div class="col-md-3">         <p class="text-center">         <h3>最受欢迎文章</h3></p>         <ol>             {% for article_rank in most_viewed %}             <li>                 <a href="{{article_rank.get_url_path}}">{{ article_rank.title }}</a>             </li>             {% endfor %}         </ol>         <hr>         <p class="text-center">         <h3>最新文章</h3></p>         <div>{% latest_articles 4 %}</div>         <hr>         <p class="text-center">         <h3>最多评论文章</h3></p>         <!--把自定义标签所得到的对象赋值给一个变量most_comments-->         {% most_commented_articles as most_comments %}         <div>             <ul>                 {% for comment_article in most_comments %}                 <li>                     <a href="{{comment_article.get_url_path}}">{{ comment_article.title }}</a>                 </li>                 {% endfor %}             </ul>         </div>          <hr>         <p class="text-center">         <h3>推荐相似文章</h3></p>         <div>             {% for similar in similar_articles %}             <p><a href="{{ similar.get_url_path }}">{{ similar.title }}</a></p>             {% empty %}             <p>对不起, 没有相似文章</p>             {% endfor %}         </div>     </div> </div> <script src='{% static "js/jquery.js" %}'></script> <script src='{% static "editor/lib/marked.min.js" %}'></script> <script src='{% static "editor/lib/prettify.min.js" %}'></script> <script src='{% static "editor/lib/raphael.min.js" %}'></script> <script src='{% static "editor/lib/underscore.min.js" %}'></script> <script src='{% static "editor/lib/sequence-diagram.min.js" %}'></script> <script src='{% static "editor/lib/flowchart.min.js" %}''></script> <script src='{% static "editor/lib/jquery.flowchart.min.js" %}'></script> <script src='{% static "editor/editormd.js" %}'></script> <script type="text/javascript" src="{% static 'js/layer.js'%}"></script> <script type="text/javascript"> $(function(){     editormd.markdownToHTML("editormd-view", {         htmlDecode      : "style,script,iframe",  // you can filter tags decode         emoji           : true,         taskList        : true,         tex             : true,  // 默认不解析         flowChart       : true,  // 默认不解析         sequenceDiagram : true,  // 默认不解析     }); }); function like_article(id,action){     $.ajax({         url: "{% url 'article:like_article' %}",         type: "POST",         data: {"id":id, "action":action},         success: function(e){             if(e=="1"){                 layer.msg("感谢点赞");                 window.location.reload();             }else{                 layer.msg("我会继续努力");                 window.location.reload();             }         },     }); } </script> {% endwith %} {% endblock %}

四 测试