多级评论

1。普通多级评论：

a.图解

b.建立数据库评论表：

class Comment(models.Model):
    """
    评论表
    """
    nid = models.BigAutoField(primary_key=True)
    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)

    reply = models.ForeignKey(verbose_name='回复评论', to='self', related_name='back', null=True)
    article = models.ForeignKey(verbose_name='评论文章', to='Article', to_field='nid')
    user = models.ForeignKey(verbose_name='评论者', to='UserInfo', to_field='nid')

c.评论：从数据库取值（建立urls.py,然后写入views.py）

 #评论：从数据库取值（写入views.py）
def info(request):
　　if request.method == "GET":
        msg_list = models.Comment.objects.filter(article_id=nid).values("nid","reply_id","user__nid","user__nickname","create_time","content","reply__user__nickname")
##################################
        msg_list_dict = {}
        for item in msg_list:
            item['child'] = []
            msg_list_dict[item['nid']] = item

###### msg_list_dict用于查找,msg_list#####

        result = []
        for item in msg_list:
            pid = item['reply_id']
            if pid:
                msg_list_dict[pid]['child'].append(item)
            else:
                result.append(item)
        #导入模块
        from utils.comment import comment_tree
        comment_str = comment_tree(result)

#####################################
        return render(request, 'index_article_list.html', {
            'comment_str': comment_str,
        })

utils：(导入views中)

def comment_tree(comment_list):
    """
    :param result: [ {id,:child:[xxx]},{}]
    :return:
    """
    comment_str = "<div class='comment'>"
    for row in comment_list:
        tpl = "<div class='content'>%s</div>" %(row['content'])
        comment_str += tpl
        if row['child']:
            child_str = comment_tree(row['child'])
            comment_str += child_str
    comment_str += "</div>"
    return comment_str

d.前端页面取值(建立html)：

{{ comment_str|safe }}

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