评论列表显示及排序，个人中心显示

from flask import Flask,render_template,request,redirect,url_for,session
from flask_sqlalchemy import SQLAlchemy
import config
from functools import wraps
from datetime import datetime
app = Flask(__name__)
app.config.from_object(config)
db=SQLAlchemy(app)

class User(db.Model):
    __table__name = ‘user‘
    id = db.Column(db.Integer,primary_key=True,autoincrement=True)
    username = db.Column(db.String(20),nullable=False)
    password = db.Column(db.String(20),nullable=False)
    nickname = db.Column(db.String(50))

class Question(db.Model):
    __tablename__ = ‘question‘
    id = db.Column(db.Integer,primary_key=True,autoincrement=True)
    title=db.Column(db.String(100),nullable=False)
    detail=db.Column(db.Text,nullable=False)
    creat_time = db.Column(db.DateTime,default=datetime.now)
    author_id=db.Column(db.Integer,db.ForeignKey(‘user.id‘))
    author=db.relationship(‘User‘,backref=db.backref(‘question‘))

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‘))
    detail=db.Column(db.Text,nullable=False)
    creat_time=db.Column(db.DateTime,default=datetime.now)
    question=db.relationship(‘Question‘,backref=db.backref(‘comments‘,order_by=creat_time.desc))
    author=db.relationship(‘User‘,backref=db.backref(‘comments‘))
db.create_all()

def loginFirst(func):
    @wraps(func)
    def wrapper(*args,**kwargs):
        if session.get(‘user‘):
            return func(*args,**kwargs)
        else:
            return redirect(url_for(‘login‘))
    return  wrapper


@app.route(‘/‘)
def index():
    context = {
        ‘question‘:Question.query.all()
    }
    return render_template(‘index.html‘,**context)

@app.route(‘/detail/<question_id>‘)
def detail(question_id):
    quest=Question.query.filter(Question.id==question_id).first()
    return render_template(‘detail.html‘,ques=quest)

@app.route(‘/comment/‘,methods=[‘POST‘])
@loginFirst
def comment():
    comment=request.form.get(‘new_comment‘)
    ques_id=request.form.get(‘question_id‘)
    auth_id=User.query.filter(User.username==session.get(‘user‘)).first().id
    comm=Comment(author_id=auth_id,question_id=ques_id,detail=comment)
    db.session.add(comm)
    db.session.commit()
    return redirect(url_for(‘detail‘),question_id=ques_id)

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

@app.route(‘/regist/‘,methods=[‘GET‘,‘POST‘])
def regist():
    if request.method==‘GET‘:
        return render_template(‘regist.html‘)
    else:
        username=request.form.get(‘username‘)
        password=request.form.get(‘password‘)
        nickname=request.form.get(‘nickname‘)
        user=User.query.filter(User.username==username).first()
        if user:
            return u‘username existed‘
        else:
            user=User (username=username,password=password,nickname=nickname)
            db.session.add(user)
            db.session.commit()
            return redirect(url_for(‘login‘))

@app.route(‘/login/‘,methods=[‘GET‘,‘POST‘])
def login():
    if request.method==‘GET‘:
        return render_template(‘login.html‘)
    else:
        username=request.form.get(‘username‘)
        password=request.form.get(‘password‘)
        user = User.query.filter(User.username == username).first()
        if user:
            if user.password==password:
                session[‘user‘]=username
                return redirect(url_for(‘index‘))
            else:
                return u‘password error‘
        else:
            return u‘username is not existed‘


@app.route(‘/logout/‘)
def logout():
    session.clear()
    return redirect(url_for(‘index‘))


@app.route(‘/question/‘,methods=[‘GET‘,‘POST‘])
@loginFirst
def question():
    if request.method == ‘GET‘:
        return render_template(‘question.html‘)
    else:
        title = request.form.get(‘title‘)
        detail = request.form.get(‘detail‘)
        author_id = User.query.filter(User.username == session.get(‘user‘)).first().id
        question = Question(title=title, detail=detail, author_id=author_id)
        db.session.add(question)
        db.session.commit()
    return redirect(url_for(‘index‘))

@app.context_processor
def mycontext():
    usern=session.get(‘user‘)
    if usern:
        return{‘username‘:usern}
    else:
        return{}


if __name__ == ‘__main__‘:
    app.run(debug=True)

{% extends‘base.html‘ %}
{% block title %}个人中心{% endblock %}

{% block main %}

    <div class="page-header">
        <h3><span class="glyphicon glyphicon-user"aria-hidden="true"></span>{{ username }}<br><small>全部问答<span class="badge"></span> </small> </h3>
        <u1 class="list-group"style="">
            {% for foo in questions %}
                <li class="list-group-item">
                    <span class="glyphicon glyphicon-heart-empty"aria-hidden="true"></span>
                    <a href="#">{{ foo.author.username }}</a>
                    <span class="badge">{{ foo.create_time }}</span>
                    <p style="">{{ foo.detail }}</p>
                </li>
            {% endfor %}
        </u1>
    </div>

    <div class="page-header">
        <h3><span class="glyphicon glyphicon-user"aria-hidden="true"></span>{{ user }}<br><small>全部评论<span class="badge"></span> </small> </h3>
        <u1 class="list-group"style="">
        {% for foo in user.comments %}
            <li class="list-group-item">
                    <span class="glyphicon glyphicon-heart-empty"aria-hidden="true"></span>
                    <a href="#">{{ foo.author.username }}</a>
                    <span class="badge">{{ foo.create_time }}</span>
                    <p style="">{{ foo.detail }}</p>
                </li>
            {% endfor %}
        </u1>
    </div>

    <div class="page-header">
        <h3><span class="glyphicon glyphicon-user"aria-hidden="true"></span>{{ user }}<br><small>个人信息<span class="badge"></span> </small> </h3>
        <u1 class="list-group"style="">
                <li class="list-group-item">用户：{{ user.uername }}</li>
                <li class="list-group-item">编号：{{ user.id }}</li>
                <li class="list-group-item">昵称：</li>
                <li class="list-group-item">文章篇数：</li>
        </u1>
    </div>

{% endblock %}