#!/usr/bin/env python
#-*- coding: utf-8 -*-from flask import Flask
from flask_sqlalchemy import SQLAlchemyapp = Flask(__name__)# 配置多个数据库连接
SQLALCHEMY_BINDS = {'users': 'sqlite:///users.db','appmeta': 'sqlite:///appmeta.db'
}app.config['SQLALCHEMY_DATABASE_URI'] =  'sqlite:///test.db' # 默认数据库引擎
app.config['SQLALCHEMY_BINDS'] = SQLALCHEMY_BINDS
app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = Falsedb = SQLAlchemy(app)class News(db.Model):__tablename__ = 'news' # 未设置__bind_key__,则采用默认的数据库引擎
id = db.Column(db.Integer, primary_key=True)news_title = db.Column(db.String(80), unique=True)news_content = db.Column(db.String(120), unique=True)def __init__(self, news_title, news_content):self.news_title = news_titleself.news_content = news_contentdef __repr__(self):return '<news_title %r>' % self.news_titleclass User(db.Model):__bind_key__ = 'users' # 已设置__bind_key__,则采用设置的数据库引擎__tablename__ = 'user'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 = usernameself.email = emaildef __repr__(self):return '<User %r>' % self.usernameclass Article(db.Model):__bind_key__ = 'appmeta'__tablename__ = 'article'id = db.Column(db.Integer, primary_key=True)title = db.Column(db.String(80), unique=True)content = db.Column(db.String(120), unique=True)def __init__(self, title, content):self.title = titleself.content = contentdef __repr__(self):return '<Title %r>' % self.titledb.create_all() # 未指定bind,则使用默认的数据库引擎
db.create_all(bind='users') # 指定bind,则使用指定的数据库引擎
db.create_all(bind='appmeta')news = News('ha','hahahhahaha') # 自动关联到相对应的ORM模型,进而使用相关联的数据库引擎
db.session.add(news) # 插入一条数据
db.session.commit()admin = User('admin', 'admin@example.com')
guest = User('guest', 'guest@example.com')
db.session.add_all([admin,guest]) # 插入多条数据
db.session.commit()title = Article('title1', 'content1')
db.session.add(title)
db.session.commit()"""
执行该文件,会自动生成三个数据库文件:appmeta.db,users.db,test.db
每个数据库中插叙的有相对应的数据
"""