通过用户模型，对数据库进行增删改查操作。

Posted 2020-10-14 杜丽晖

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.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)

#db.create_all()

# user = User(username = \'mis9999\',password = \'123123123\')
# db.session.add(user)
# db.session.commit()

# user = User.query.filter(User.username == \'mis9999\').first()
# user.password = \'1231234321\'
# db.session.commit()
# print (user.id,user.password)

# user = User.query.filter(User.username == \'mis9999\').first()
# db.session.delete(user)
# db.session.commit()

# user = User(username = \'mis666\',password = \'999666\')
# db.session.add(user)
# db.session.commit()

# user=User.query.filter(User.username==\'m456123\').first()


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


if __name__ == \'__main__\':
    app.run()

SQLALCHEMY_DATABASE_URI = \'mysql+pymysql://root:@127.0.0.1:3306/niub2?charset=utf8\'
SQLALCHEMY_TRACK_MODIFICATIONS = False