制作首页的显示列表。

Posted 2020-10-16 20150605096谢阳

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篇首语：本文由小常识网(cha138.com)小编为大家整理，主要介绍了制作首页的显示列表。相关的知识，希望对你有一定的参考价值。

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>

2. 用字典向index.html传递参数。

{% extends‘base.html‘ %}
    {% block title %}
    首页
    {% endblock %}
{% block head %}
    <link rel="stylesheet" type="text/css" href="{{ url_for(‘static‘,filename=‘css/shouye.css‘) }}">
{% endblock %}
{% block main %}
<body>


<ul class="list-group">
            <li style="padding-left: 0px;padding-right: 10px;box-shadow: #cccccc" class="list-group-item">
                <span class="glyphicon glyphicon-leaf" aria-hidden="true"></span>
                <a href="#">{{ user }}</a><br>
                <a href="#" class="title">{{ title }}</a>
                <span class="badge">{{ time }}</span>
                <p class="detail">{{ detail }}</p>

            </li>
        </ul>

<div class="tu">
        <div class="img">
            <a href="http://www.gzcc.cn/">
                <img src="http://static.runoob.com/images/demo/demo4.jpg"></a>
            <div class="desc"><a href="http://www.gzcc.cn">校园风光</a></div>
        </div>
        <div class="img">
            <a href="http://www.gzcc.cn/">
                <img src="http://static.runoob.com/images/demo/demo3.jpg"></a>
            <div class="desc"><a href="http://www.gzcc.cn">校友风采</a></div>
        </div>
        <div class="img">
            <a href="http://www.gzcc.cn/">
                <img src="http://static.runoob.com/images/demo/demo2.jpg"></a>
            <div class="desc"><a href="http://www.gzcc.cn">学校文化</a></div>
        </div>
        <div class="img">
            <a href="http://www.gzcc.cn/">
                <img src="http://static.runoob.com/images/demo/demo1.jpg"></a>
            <div class="desc"><a href="http://www.gzcc.cn">学生风采</a></div>
        </div>
    </div>

</body>

{% endblock %}

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


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)


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 base():
    return render_template(‘base.html‘)


@app.route(‘/shouye/‘)
def shouye():
    context = {
        ‘user‘: ‘‘,
        ‘title‘: ‘‘,
        ‘time‘: ‘‘,
        ‘detail‘: ‘‘
    }
    return render_template(‘shouye.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
                return redirect(url_for(‘shouye‘))
            else:
                return u‘password error‘
        else:
            return u‘username is not existed.‘


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

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(‘shouye‘))



@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(‘shouye‘))



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

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