通过用户模型，对数据库进行增删改查操作

 

 

增加：
user = 
db.session.add(user)
db.session.commit()

查询：
User.query.filter(User.username == 'mis1114').first()

修改
user.password = '111111'
db.session.commit()

删除：
db.session.delete(user)
db.sessi

 

 

on.commit()

from flask import Flask
from flask_sqlalchemy import SQLAlchemy
import config

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

db=SQLAlchemy(app)

class User(db.Model):
    __tablename__ = 'User'
    id = db.Column(db.Integer,primary_key=True,autoincrement=True)
    username = db.Column(db.String(20),nullable=False)
    password = db.Column(db.String(20),nullable=False)
    nickname = db.Column(db.String(20))

#db.create_all()
#增加
user=User(username='mis112',password='123456',nickname='magical')


#查询
user=User.query.filter(User.username=='mis112').first()
print(user.id,user.password,user.nickname)

#修改
user.password='223456'

#删除
db.session.delete(user)




db.session.add(user)
db.session.commit()

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