制作首页的显示列表

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>

  <li>Tea</li>

  <li>Milk</li>

</ul>

2. 用字典向index.html传递参数。

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

app = Flask(__name__)
app.config.from_object(config)

db=SQLAlchemy(app)

class User(db.Model):
    __tablename__ = '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(20))

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 = {
        'question':'python20171201'
    }
    return render_template('index.html',**context)

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

@app.route('/rege/',methods=['GET','POST'])
def rege():
    if request.method =='GET':
        return render_template('rege.html')
    else:
        usern = request.form.get('username')
        passw = request.form.get('password')
        nickn = request.form.get('nickname')
        user = User.query.filter(User.username ==usern).first()
        if user:
            return 'username.existed.'
        else:
            user1 = User(username=usern,password=passw,nickname = nickn)
            db.session.add(user1)
            db.session.commit()
            return redirect(url_for('login'))

def loginFrist(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'])
@loginFrist
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{}

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


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

{% extends 'basic.html' %}
{% block title %}登陆{% endblock %}

{% block head %}
    <link rel="stylesheet" type="text/css" href="{{ url_for('static',filename='../staticcss/20.css') }}">
    <link rel="stylesheet" type="text/css" href="{{ url_for('static',filename='../staticcss/200.css') }}">
    <link rel="stylesheet" type="text/css" href="{{ url_for('static',filename='../static/css/2000.css') }}">
    <link rel="stylesheet" type="text/css" href="{{ url_for('static',filename='../static/css/2000.css') }}">
    <script src="{{url_for('static',filename='../static/js/39.js') }}" type="text/css"></script>
{% endblock %}

{% block index %}
</head>
<body class="abc">

<ul class="list-group">
    <li class="list-group-item">
        <span class="glyphicon glyphicon-leaf" aria-hidden="true"></span>
        <a href="#">username</a>
        <br>
        <a href="#"title></a>
        <span class="badge">create_time</span>
        <p>detauk{{ question }}</p>

    </li>
</ul>




<div>

    <div class="img">
        <a href={{ url_for('login') }}>
            <img src="https://ss3.bdstatic.com/70cFv8Sh_Q1YnxGkpoWK1HF6hhy/it/u=4071790924,2914289697&fm=27&gp=0.jpg">
        </a>
        <div class="desc"><a href={{ url_for('login') }}>登陆</a> </div>
    </div>
     <div class="img">
        <a href={{ url_for('rege') }}>
            <img src="https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1508478993164&di=21005bc9d7cbc500390e5b62c3b859a7&imgtype=0&src=http%3A%2F%2Fwapfile.desktx.com%2Fpc%2F161122%2Fbigpic%2F5832b76c05a7e.jpg">
        </a>
        <div class="desc"><a href={{ url_for('rege') }}>注册</a> </div>
    </div>

</div>


<div class="clearfloat">


<img src="https://ss3.bdstatic.com/70cFv8Sh_Q1YnxGkpoWK1HF6hhy/it/u=4071790924,2914289697&fm=27&gp=0.jpg">
<img src="https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1508478993164&di=21005bc9d7cbc500390e5b62c3b859a7&imgtype=0&src=http%3A%2F%2Fwapfile.desktx.com%2Fpc%2F161122%2Fbigpic%2F5832b76c05a7e.jpg">

</div>



</body>
</html>{% endblock %}