制作首页的显示列表

最新推荐文章于 2023-04-24 15:04:15 发布

转载最新推荐文章于 2023-04-24 15:04:15 发布 · 119 阅读

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CC 4.0 BY-SA版权

原文链接：http://www.cnblogs.com/kebibrany/p/7943934.html

本文详细介绍了如何使用Flask框架构建一个简单的问答系统，包括用户注册、登录、提问等功能，以及如何通过数据库模型管理用户和问题数据。

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。

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'))
#db.create_all()


@app.route('/')
def index():
    context = {
        'question': 'python20171201'
    }
    return render_template('index.html')

@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.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('/lable/',methods=['GET','POST'])
@loginFirst
def lable():
    if request.method == 'GET':
        return render_template('lable.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)

{% extends 'base.html' %}

{% block title %}首页{% endblock %}

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

{% block main %}
    <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="http://www.baidu.cn/">
         <img src="http://p3.so.qhimgs1.com/bdr/_240_/t015a62ea10ce841183.jpg"></a>
        <div><a href="http://www.baidu.cn/">阿斯顿马丁</a></div>
    </div>
      <div class="img">
        <a href="http://www.baidu.cn/">
         <img src="http://p2.so.qhimgs1.com/bdr/_240_/t014017698c50318c42.jpg"></a>
        <div><a href="http://www.baidu.cn/">雪佛兰</a></div>
    </div>
       <div class="img">
        <a href="http://www.baidu.cn/">
         <img src="http://p5.so.qhimgs1.com/bdr/_240_/t01d01aca9f5db2159b.jpg"></a>
        <div><a href="http://www.baidu.cn/">兰博基尼</a></div>
    </div>
        <div class="img">
        <a href="http://www.baidu.cn/">
         <img src="http://p5.so.qhimgs1.com/bdr/_240_/t01fb87f1928a69d5eb.jpg"></a>
        <div><a href="http://www.baidu.cn/">奔驰</a></div>
    </div>
</div>
<img src="http://p3.so.qhimgs1.com/bdr/_240_/t015a62ea10ce841183.jpg">
<img src="http://p2.so.qhimgs1.com/bdr/_240_/t014017698c50318c42.jpg">
<img src="http://p5.so.qhimgs1.com/bdr/_240_/t01d01aca9f5db2159b.jpg">
<img src="http://p5.so.qhimgs1.com/bdr/_240_/t01fb87f1928a69d5eb.jpg">
{% endblock %}

转载于:https://www.cnblogs.com/kebibrany/p/7943934.html