flask入门 之 Python Shell (三)

1.代码:

#encoding:utf-8

from flask_sqlalchemy import SQLAlchemy

from flask_script import Manager,Shell

from flask_migrate import Migrate,MigrateCommand

from flask import Flask

 

app = Flask(__name__)

app.config['SQLALCHEMY_DATABASE_URI']='mysql+pymysql://root:005@127.0.0.1:3306/data'

app.config['SQLALCHEMY_COMMIT_ON_TEARDOWN']=True

app.config['SQLALCHEMY_TRACK_MODIFICATIONS']=False

app.config['JSON_AS_ASCII']=False

db = SQLAlchemy(app)

migrate = Migrate(app,db)

manager = Manager(app)

manager.add_command('db',MigrateCommand)

Student_Teacher=db.Table(

'Student_Teacher',

        db.Column('tea_id',db.Integer,db.ForeignKey('tea.id'),primary_key=True),

        db.Column('stu_id',db.Integer,db.ForeignKey('stu.id'),primary_key=True)

)

class Student(db.Model):

    __tablename__='stu'

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

    name=db.Column(db.String(20),nullable=False)

class Teacher(db.Model):

    __tablename__='tea'

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

    name=db.Column(db.String(20),nullable=False)

    students=db.relationship('Student',secondary=Student_Teacher,backref=db.backref('mytea'))

def make_shell_context():

    return dict(app=app,db=db,Student=Student,Teacher=Teacher)

manager.add_command('shell',Shell(make_context=make_shell_context))

    

if __name__=='__main__':

    manager.run()

2.效果: