制作首页的显示列表。

1. 在首页添加显示问答的列表，并定义好相应的样式。

无序列表

<ul >

<li>Coffee</li>

</ul>

{% extends'base.html' %}
    {% block title %}
    首页
    {% endblock %}
{% block head %}

    <script src="{{url_for('static',filename='js/base.js') }}" type="text/javascript"></script>
    <link href="{{ url_for('static' ,filename='css/base.css') }}"  rel="stylesheet" type="text/css">
    {% endblock %}
    {% block main %}
</head>
<body id="myBody">
        <div id="gufeng">
       <ul class="list" >
           <li class="">用户名:{{ user }}</li>
           <li class="">问题:{{ question }}</li>
           <li class="">时间:{{ time }}</li>
       </ul>
   </div>
    <footer>
        <div class="footer_box">
            Copyright@2017-2027 个人版权，版权所有 作者：JZX telephone:0000-1234567 mobile phone:11111111111
        </div>
    </footer>
{% endblock %}
</body>
</html>

2. 用字典向index.html传递参数。

from flask import Flask,render_template,request,redirect,url_for,session
from flask_sqlalchemy import SQLAlchemy
import config
from datetime import datetime
from functools import wraps

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'))
#db.create_all()

@app.route('/')
def index():
    context={
        'user':'GuFeng',
        'question':'喜欢古风？',
        'time':'2017年12月1日'
    }
    return render_template('index.html',**context)

@app.route('/zhuce/',methods=['GET','POST'])
def zhuce():
    if request.method =='GET':
        return  render_template('zhuce.html')
    else:
        usern = request.form.get('name')
        teln = request.form.get('password')
        passw = request.form.get('password1')
        user = User.query.filter(User.username==usern).first()
        if user:
            return 'username existed'
        else:
            user= User(username=usern,tel=teln,password=passw)
            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.context_processor
def mycontext():
    usern = session.get('user')
    if usern:
        return{'username':usern}
    else:
        return {}

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

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('/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'))

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