8---Flask-Script

Posted 2021-01-23 edeny

8、Flask-Script

 Flask-script的作用是可以通过命令行的形式操作flask。安装方式：pip install flask-script

1.1.command装饰器

（1）创建manage.py

from flask_script import Manager

from flask_scripts_demo import app

manager = Manager(app)

@manager.command      #这个装饰器把函数变成在终端可以运行的命令
def greet():       
    print(‘你好‘)

if __name__ == ‘__main__‘:
    manager.run()

（2）执行命令

在cmd终端运行

python manage.py greet

# “你好”

 1.2.option装饰器

manage.py

from flask_script import Manager

from flask_scripts_demo import app

manager = Manager(app)

@manager.command      #这个装饰器把函数变成在终端可以运行的命令
def greet():
    print(‘你好‘)

#如果函数需要传递参数就用option装饰器
@manager.option("-u","--username",dest="username")    #第一个参数是简称
@manager.option("-a","--age",dest="age")
def add_user(username,age):
    print("添加的用户名是：%s,年龄是：%s"%(username,age))


if __name__ == ‘__main__‘:
    manager.run()

在cmd终端添加用户

python manage.py add_user -u derek -a 18


#添加的用户名是：derek,年龄是：18

1.3. 实例：模拟django通过命令添加超级管理员

flask-script_demo.py

from flask import Flask
from flask_sqlalchemy import SQLAlchemy
import config

app = Flask(__name__)
app.config.from_object(config)
db = SQLAlchemy(app)

class BackendUser(db.Model):
    __tablename__ = ‘backend_user‘
    id = db.Column(db.Integer,primary_key=True,autoincrement=True)
    username = db.Column(db.String(50),nullable=False)
    email = db.Column(db.String(50),nullable=False)

db.create_all()

@app.route(‘/‘)
def hello_world():
    return ‘Hello World!‘

if __name__ == ‘__main__‘:
    app.run()

manage.py

from flask_script import Manager

from flask_scripts_demo import app
from flask_scripts_demo import BackendUser,db

manager = Manager(app)

@manager.option("-u","--username",dest="username")    
@manager.option("-e","--email",dest="email")
def add_user(username,email):
    user = BackendUser(username=username,email=email)
    db.session.add(user)
    db.session.commit()


if __name__ == ‘__main__‘:
    manager.run()

cmd终端添加用户到数据库

python manage.py add_user -u derek -e [email protected]

 

 

1.1.command装饰器