安装对应模块

pip3 install flask-sqlalchemy mysql-connector

安装mysql

详见： mysql安装方式

mysql配置项

信息

IP

127.0.0.1

port

3306

user

root

password

123456

databases

flask_test

tables

user_info

user_info列user_id,user_name

示例脚本

vim flask_mysql.py

#!/usr/bin/env python3

# -*- coding:utf-8 -*-

# python_version : python 3.7

# Author : taoyx

# Email : [email protected]

import uuid

from flask import Flask

from flask_sqlalchemy import SQLAlchemy

def uuid_demo():

uuid_4 = uuid.uuid4()

uuid_id = ''.join(str(uuid_4).split('-'))

return uuid_id

app = Flask(__name__)

app.config['SQLALCHEMY_DATABASE_URI'] ='mysql+mysqlconnector://root:[email protected]:3306/flask_test?charset=utf8'

app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False

db = SQLAlchemy(app)

class user_info(db.Model):

__tablename__ = 'user_info'

user_id = db.Column('user_id', db.Integer, primary_key=True, unique=True, nullable=True)

user_name = db.Column(db.String(255), unique=True, nullable=True)

def __init__(self, user_id, user_name):

self.user_id = user_id

self.user_name = user_name

def __repr__(self):

return "{'user_id':'%s', 'user_name':'%s'}" % (self.user_id, self.user_name)

# 插入新数据

add_user = user_info(uuid_demo(), 'xiaoming')

db.session.add(add_user)

db.session.commit()

# 查询全部数据,并按照`user_name`列倒序查询

#xa = db.session.query(user_info).all()

xa = user_info.query.order_by(user_info.user_name.desc()).all()

print(xa)

# 查询指定数据,并按照`user_name`列倒序查询,并从第2条开始，查询共计5条数据

#x = db.session.query(user_info).filter(user_info.user_name == 'xiaoming').first()

x = host_info.query.filter(user_info.user_name == 'xiaoming').order_by(user_info.user_name.desc()).offset(2).limit(5).all()

print(y)

# 查询模糊数据,并按照`user_name`列倒序查询,并从第2条开始，查询共计5条数据

# 与'like'相比，'ilike'忽略大小写

#x = db.session.query(user_info).filter(user_info.user_name == 'xiaoming').first()

x = host_info.query.filter(user_info.user_name.ilike('xiao%')).order_by(user_info.user_name.desc()).offset(2).limit(5).all()

print(y)

# 更新数据

updata_user = host_info.query.filter(user_info.user_name == 'xiaoming').all()

updata_user.user_name = 'xiaohong'

db.session.commit()

# 删除数据

del_user = host_info.query.filter(user_info.user_name == 'xiaohong').all()

db.session.delete(del_user)

db.session.commit()

原文：https://www.cnblogs.com/taoyuxuan/p/11846657.html