评论列表显示及排序，我的中心显示

1. 显示全部评论
   {% for foo in ques.comments %}
   
   
2. 全部评论排序
   uquestion = db.relationship('Question', backref=db.backref('comments', order_by=creat_time.desc))
   
   
3. 显示评论条数
   {{ ques.comments|length }}
   
   
4. 完成我的中心

1.我的中心的页面布局（html文件及相应的样式文件）

2.定义视图函数def usercenter(user_id):

3.向前端页面传递参数

4.页面显示相应数据

发布的所有问答

发布的所有评论

我的信息

5.各个页面连接到我的中心

@app.route('/usercenter/<user_id>')
@loginFirst
def usercenter(user_id):
    user=User.query.filter(User.id==user_id).first()
    context={
        'username':user.username,
        'question':user.question,
        'comments':user.comments
    }
    return render_template('usercenter.html',**context)

{% extends 'shouye.html' %}
{% block title %}我的中心{% endblock %}
{% block head %}
    <link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
    <link rel="stylesheet" type="text/css" href="../static/css/usercenter.css">
{% endblock %}

{% block main %}
    <div class="page-header">
        <h3><span class="glyphicon glyphicon-user" 　aria-hidden="true"></span>{{ username }}<br>
            <small>所有问答<span class="s1"></span></small>
        </h3>
        <ul class="list-group" style="margin: 10px">
            {% for foo in question %}
                <li class="list-group-item">
                    <span class="glyphicon glyphicon-heart-empty" aria-hidden="true"></span>
                    <a href="#">{{ foo.author.username }}</a>
                    <span class="s2">{{ foo.create_time }}</span>
                    <p>{{ foo.detail }}</p>
                </li>
            {% endfor %}
        </ul>
    </div>

    <div class="page-header">
        <h3><span class="glyphicon glyphicon-user" aria-hidden="true"></span>{{ user }}<br>
            <small>所有评论<span class="s1"></span></small>
        </h3>
        <ul class="list-group" style="margin: 10px">
            {% for foo in comments %}
                <li class="list-group-item">
                    <span class="glyphicon glyphicon-heart-empty" aria-hidden="true"></span>
                    <a href="#">{{ foo.author.username }}</a>
                    <span class="s2">{{ foo.create_time }}</span>
                    <p>{{ foo.detail }}</p>
                </li>
            {% endfor %}
        </ul>
    </div>

    <div class="page-header">
        <h3><span class="glyphicon glyphicon-user" aria-hidden="true"></span>{{ user }}<br>
            <small>我的信息<span class="s1"></span></small>
        </h3>
        <ul class="list-group" style="margin: 10px">
            <li class="list-group-item">用户:{{ username }}</li>
            <li class="list-group-item">编号:</li>
            <li class="list-group-item">昵称:</li>
        </ul>
    </div>
{% endblock %}

   {% for foo in ques.comments %}
                <li class="post_item">
                    <a href="{{ url_for('usercenter',user_id=foo.author.id) }}" class="light">{{foo.author.username }}</a><br>
                    <p class="post_item">{{ foo.detail }}</p>
                    <span class="foot">发布于  {{ foo.create_time }}</span>
                </li>
                <hr>
            {% endfor %}
        </ul>