小白个人博客---文章评论实现

1.修改以前的数据：

增加parent_id，评论的第一楼值为none,没有父级

子评论的parent_id即为上级评论的nid

reply即回复的内容，因为他是对已经存在的Comment进行回复，同时他本身也是一条评论，可以被其他人继续回复，所以是自关联。

 

class Comment(models.Model):
    """用户评论"""
    nid=models.BigAutoField(primary_key=True)
    parent_id=models.IntegerField(verbose_name="父级评论id",null=True,blank=True)
    reply=models.ForeignKey(verbose_name="回复评论",to="self",to_field="nid",related_name="rep",blank=True,null=True,on_delete=models.CASCADE)
    content=models.CharField(verbose_name="评论内容",max_length=255)
    create_time=models.DateTimeField(verbose_name="创建时间",auto_now_add=True)
    article=models.ForeignKey(verbose_name="评论文章",to="Article",to_field="nid",on_delete=models.CASCADE)
    user=models.ForeignKey(verbose_name="评论者",to="UserInfo",to_field="uid",on_delete=models.CASCADE)

2.views:

1.回顾文章详细detail：

def detail(requset, site, nid):
    blog = models.Blog.objects.filter(site=site).select_related("user").first()
    tag_list = models.Tag.objects.filter(blog=blog.bid)
    category_list = models.Category.objects.filter(blog=blog)
    date_list = models.Article.objects.raw(
        'select nid,count(nid) as num,strftime("%Y-%m",create_time) as ctime from repository_article where blog_id=' +
        str(blog.bid) + ' group by strftime("%Y-%m",create_time)'
    )
    article = models.Article.objects.filter(blog=blog, nid=nid).select_related("category").first()
    comment_list = models.Comment.objects.filter(article=article).values("nid","parent_id","user__username","content","create_time")
    comment_str = comment_data_handle(comment_list)  #交给其他函数处理
    print("requ", requset.user)
    return render(requset, "home_detail.html", {
        "blog": blog,
        "article": article,
        "tag_list": tag_list,
        "category_list": category_list,
        "date_list": date_list,
        "comment_str": comment_str,            #让后台生成html,直接传到模板
    })

def comment_data_handle(comment_list):
    #所有的字评论按父级分组
    print('comm_list',comment_list)
    comment_dict={}
    for item in comment_list:
        item["child"]=[]        
        comment_dict[item["nid"]]=item      #重新处理comment_list:{1:{nid:1,...child:[]}}
    print("comment_dict",comment_dict)
    result=[]
    for v in comment_dict.values():
        if not v['parent_id']:          #拿出第一楼的，没有parent_id
            result.append(v)
        else:
            comment_dict[v['parent_id']]['child'].append(v)  #其他的根据各自的parent_id,添加到parent的child
    res=comment_tree(result)  #到此数据的格式处理完毕，有parent_id的都加到child里面
    return res

def comment_tree(result_list):              #生成第一楼的html
    response=""
    text="""
    <div style="border:1px solid">
        <span>评论人:%s 评论时间：%s</span>
        <a cid=%s class="reply">回复</a>
        <div>评论内容:%s</div>
        <div style="margin-left:20px;">%s</div>
    </div>
    <hr/>
    """
    for item in result_list:
        user=item["user__username"]
        ctime=item["create_time"].strftime("%Y-%m-%d %H:%M:%S")
        content=item["content"]
        child_content=child_content_hanndle(item["child"])    #处理子评论
        response+= text %(user,ctime,item['nid'],content,child_content)

    print(response)
    return response

def child_content_hanndle(child_list):
    response = ""
    text = """
           <div style="border:1px solid">
               <span>评论人:%s 评论时间：%s</span>
               <a cid=%s class="reply">回复</a>
               <div>评论内容:%s</div>
               <div style="margin-left:20px;">%s</div>
           </div>
           <hr/>

           """

    for item in child_list:
        user = item["user__username"]
        ctime = item["create_time"].strftime("%Y-%m-%d %H:%M:%S")
        content = item["content"]
        child_child_content=child_content_hanndle(item["child"])           #递归处理child的child
        response += text % (user, ctime,item['nid'], content,child_child_content)
    return response