增加:
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.session.commit()
from flask import Flask
from flask_sqlalchemy import SQLAlchemy
import config
app=Flask(__name__)
app.config.from_object(config)
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()
'''
user=User.query.filter(User.username=='mis1',password='mis1')
db.session.add(user)
db.session.commit()
'''
user=User.query.filter(User.username=='mis1').first()
user.password='123456'
user.username='mis1'
print(user.username,user.password)
db.session.commit()
@app.route('/')
def hello_world():
return 'Hello World!'
if __name__=='__main__':
app.run()
![](https://images2017.cnblogs.com/blog/1232330/201711/1232330-20171115160308359-846241252.png)