flask-sqlalchemy 关系表简单操作

from flask import Flask
from flask.ext.sqlalchemy import SQLAlchemy
from flask.ext.migrate import Migrate, MigrateCommand
from flask.ext.script import Manager app = Flask(__name__)
app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///test.db'
db = SQLAlchemy(app) migrate = Migrate(app, db) manager = Manager(app)
manager.add_command('db', MigrateCommand) class Post(db.Model):
id = db.Column(db.Integer, primary_key=True)
name = db.Column(db.String(80)) category_id = db.Column(db.Integer, db.ForeignKey('category.id'))
category = db.relationship('Category',
backref=db.backref('posts', lazy='dynamic')) class Category(db.Model):
id = db.Column(db.Integer, primary_key=True)
password = db.Column(db.String(50)) @manager.command
def run():
app.debug = True
app.run() if __name__ == '__main__':
manager.run() # test
# c1 = Category(password = 'pass1')
# p1 = Post(name='name1',category=c1)
# db.session.add(p1)
# db.session.commit()
#
# p1 = db.session.query(Category).one()
# print p1.id == 1
# print p1.posts.one().name == 'name1'
# print p1.posts.all()[0].name =='name1'
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