制作首页的显示列表。

最新推荐文章于 2025-09-12 15:58:40 发布

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最新推荐文章于 2025-09-12 15:58:40 发布

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CC 4.0 BY-SA版权

文章标签： python 数据库

原文链接：http://www.cnblogs.com/ffr0068/p/7941223.html

本文介绍如何使用Flask框架实现一个简单的问答社区首页，包括列表展示、用户登录注册及发布问题等功能。

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>

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
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)
    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 shouye():
    context = {
        'questions': Question.query.all()
    }
    return render_template('shouye.html', **context)

@app.route('/denglu/',methods=['GET','POST'])
def gg():
    if request.method == 'GET':
        return render_template('denglu.html') #跳转登录
    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.parmanent = True
                return redirect(url_for('shouye'))
            else:
                return u'password error'
        else:
            return u'username is not existed'

@app.route('/zhuche/', methods=['GET','POST'])
def login ():
    if request.method =='GET':
        return render_template('zhuce.html')#跳转注册
    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 u'username existed'
        else:
            user1 = User(username = usern,password = passw,nickname=nickn)
            db.session.add(user1)#数据库操作
            db.session.commit()
            return redirect(url_for('gg'))

@app.route('/tupian/')
def hh():
    return render_template('tupian.html') #跳转图片库

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

@app.route('/fabu/',methods=['GET','POST'])
@loginFirst
def fabu():
    if request.method == 'GET':
        return render_template('fabu.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')) # 跳转发布

@app.context_processor
def context():
    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)

{% extends 'base.html' %}

{% block shouyetitle %}首页{% endblock %}
{% block shouyehead %}

    <title>首页</title>

{% endblock %}
{% block shouyebody %}

        <ul class="list-group">
        {% for foo in questions %}
            <li class="list-group-item">
                <span class="glyphicon" glyphicon-leaf aria-hidden="true"></span>
                <a href="#">{{ foo.author.username }}</a>
                <br>
                <a href="#">{{ foo.title }}</a>
                <span class="badge">{{ foo.creat_time }}</span>
                <p style="...">{{ foo.detail }}</p>
            </li>
        {% endfor %}
         </ul>

{% endblock %}