flask-sqlalchemy教程的开始都是创建数据库,数据表,那py文件每一次执行...

发布网友 发布时间：2022-04-26 22:00

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热心网友 时间：2022-04-08 03:01

python3下用flask-sqlalchemy对mysql数据库操作案例：
from flask import Flask
from flask.ext.sqlalchemy import SQLAlchemy

app = Flask(__name__)
app.config['SQLALCHEMY_DATABASE_URI'] = 'mysql://username:password@localhost/db_name'
db = SQLAlchemy(app)

class User(db.Model):
id = db.Column(db.Integer, primary_key=True)
username = db.Column(db.String(80), unique=True)
email = db.Column(db.String(120), unique=True)

def __init__(self, username, email):
self.username = username
self.email = email

def __repr__(self):
return '<User %r>' % self.username

admin = User('admin', 'admin@example.com')

db.create_all() # In case user table doesn't exists already. Else remove it.

db.session.add(admin)

db.session.commit() # This is needed to write the changes to database

User.query.all()

User.query.filter_by(username='admin').first()

热心网友 时间：2022-04-08 04:19

这个只是连接数据库，数据库还要自己创建才能连接上去