python基于flask_sqlalchemy的网页显示数据库信息的代码示例

# 模板文件templates/list.html

{% extends 'base.html' %}

{% block title %}

    显示

{% endblock %}

{% block newcontent %}

<table class="table table-striped">

    <tr>

        <th>用户编号</th>

        <th>用户名称</th>

        <th>用户密码</th>

        <th>用户创建时间</th>

        <th>用户会员类型</th>

    </tr>

    {% for user  in users %}

        <tr>

            <td>{{ user.id }}</td>

            <td>{{ user.name }}</td>

            <td>{{ user.passwd }}</td>

            <td>{{ user.add_time }}</td>

            <td>{{ user.role.name }}</td>

        </tr>

    {% endfor %}

</table>

{% endblock %}

# 数据库操作文件zaj_sql_models.py

from datetime import datetime

from flask_bootstrap import Bootstrap

from flask_wtf import FlaskForm

from flask_sqlalchemy import SQLAlchemy

from flask import Flask

import pymysql

from sqlalchemy import desc

app = Flask(__name__)

db = SQLAlchemy(app)

app.config['SQLALCHEMY_DATABASE_URI'] = 'mysql+pymysql://root:sheen@localhost/zaj_sql'

app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = True

bootstrap = Bootstrap(app)

# class Student(db.Model):

#     __tablename__ = 'students'

#     sid = db.Column(db.SMALLINT,primary_key=True)

#     sname = db.Column(db.String(50))

#     sage = db.Column(db.Integer)

class User(db.Model):

    id = db.Column(db.Integer,autoincrement=True,primary_key=True)

    name = db.Column(db.String(50),unique=True)

    passwd = db.Column(db.String(100))

    add_time = db.Column(db.DATETIME,default=datetime.now())

    gender = db.Column(db.BOOLEAN,default=True)

    role_id = db.Column(db.INTEGER,db.ForeignKey('role.id'))

    def __repr__(self):

        return '<User:%s>' %(self.name)

class Role(db.Model):

    id = db.Column(db.INTEGER,autoincrement=True,primary_key=True)

    name = db.Column(db.String(50),unique=True)

    users = db.relationship('User',backref='role')

    # 给Role模型添加users属性

    # backref 是定义反向引用，可以通过User.role访问User里面的数据

    def __repr__(self):

        return '<Role:%s>' % (self.name)

if __name__ =='__main__':

    # 1. 创建数据库表

    db.drop_all()

    db.create_all()

    # 2. 创建role数据库表数据

    role_1 = Role(name='超级会员')

    role_2 = Role(name='普通会员')

    db.session.add(role_1)

    db.session.add(role_2)

    db.session.commit()

    # # # 3. 添加user表内数据，100个用户，50个为超级会员，50个为普通会员

    for i in range(1,13):

        if i%2 == 0:

            u = User(name='sheen'+str(i),passwd='sheen',role_id=1)

            db.session.add(u)

        else:

            u = User(name='star'+str(i),passwd='star',role_id=2)

            db.session.add(u)

    db.session.commit()

#主程序

from flask import Flask,render_template

from zaj_sql_models import app

from zaj_sql_models import User

@app.route('/')

def index():

    return render_template('index.html')

@app.route('/list/')

def list():

    users = User.query.all()

    return render_template('list.html',users=users)

if __name__ == '__main__':

    app.run()