作业33——评论列表显示及排序，个人中心显示

1. 显示所有评论
   {% for foo in ques.comments %}
   

   <h4>评论：({{ quest.comments|length }})</h4>
                   <ul class="news-list">
                       {% for foo in quest.comments %}
                           <li class="list-group-item">
                               <a href="#">{{ foo.author.username }} </a>
                               <span class="badge">{{ foo.creat_time }}</span>
                               <p>{{ foo.detail }}</p>
                           </li>
                       {% endfor %}
                   </ul>

2. 所有评论排序
   uquestion = db.relationship('Question', backref=db.backref('comments', order_by=creat_time.desc))
   
   
3. 显示评论条数
   {{ ques.comments|length }}
   

   class Comment(db.Model):
       __tablename__ = 'comment'
       id = db.Column(db.Integer, primary_key=True, autoincrement=True)
       author_id = db.Column(db.Integer, db.ForeignKey('user.id'))
       question_id = db.Column(db.Integer, db.ForeignKey('question.id'))
       creat_time = db.Column(db.DateTime, default=datetime.now)
       detail = db.Column(db.Text, nullable=False)
       question = db.relationship('Question', backref=db.backref('comments', order_by=creat_time.desc))
       author = db.relationship('User', backref=db.backref('comments'))

4. 完成个人中心

1.个人中心的页面布局（html文件及相应的样式文件）

{% extends 'base.html' %} }
{% block title %}用户中心{% endblock %}

{% block head %}
    <!-- 引入 Bootstrap -->
    <link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
{% endblock %}

{% block main %}

    <div class="page-header">
        <h3><span class="glyphicon glyphicon-user" aria-hidden="true"></span>
            {{ username }}
            <br>
            <small>all questions</small>
        </h3>
        <ul class="news-list">
            {% for foo in questions %}
                <li class="list-group-item">
                    <span class="glyphicon glyphicon-heart" aria-hidden="true"></span>
                    <a href="#">{{ foo.author.username }} </a>
                    <span class="badge">{{ foo.creat_time }}</span>
                    <p>{{ foo.detail }}</p>
                </li>
            {% endfor %}
        </ul>
    </div>

    <div class="page-header">
        <h3><span class="glyphicon glyphicon-user" aria-hidden="true"></span>
            {{ username }}
            <br>
            <small>all comments</small>
        </h3>
        <ul class="news-list">
            {% for foo in comments %}
                <li class="list-group-item">
                    <span class="glyphicon glyphicon-heart" aria-hidden="true"></span>
                    <a href="#">{{ foo.author.username }} </a>
                    <span class="badge">{{ foo.creat_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>User</small>
        </h3>
        <ul class="news-list">

            <li class="list-group-item">
                <span class="glyphicon glyphicon-heart" aria-hidden="true"></span>
                Username: {{ username }}
            </li>
            <li class="list-group-item">
                <span class="glyphicon glyphicon-heart" aria-hidden="true"></span>
                Nickname: {{ nickname }}
            </li>

        </ul>
    </div>
{% endblock %}

2.定义视图函数def usercenter(user_id):

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

3.向前端页面传递参数

4.页面显示相应数据

发布的全部问答

发布的全部评论

个人信息

5.各个页面链接到个人中心

<a href="{{ url_for('usercenter',user_id=foo.author.id) }}">{{ foo.author.username }} 评论：({{ foo.comments|length }})</a>