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.session.commit()

 

from flask import Flask
from flask import render_template
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()
# # 增加数据
# user = User(Username='yangyan', Password='1111111')
# db.session.add(user)
# db.session.commit()
#
# user = User(Username='mis123', Password='2222222')
# db.session.add(user)
# db.session.commit()
#
# user = User(Username='huangzhen', Password='3333333')
# db.session.add(user)
# db.session.commit()
#
# user = User(Username='okoko', Password='4444444')
# db.session.add(user)
# db.session.commit()

# # 查询数据
# user = User.query.filter(User.Username=='yangyan').first()
# print(user.id,user.Username,user.Password)

# 修改
user = User.query.filter(User.Username=='yangyan').first()
user.Password ='66666666'
db.session.commit()

# #删除
# user = User.query.filter(User.Username=='mis123').first()
# db.session.delete(user)
# db.session.commit()

@app.route('/')
def base():
    return render_template('base.html')


@app.route('/login/', methods=['GET', 'POST'])
def login():
    return render_template('login.html')


@app.route('/register/', methods=['GET', 'POST'])
def register():
    return render_template('register.html')


@app.route('/question/')
def question():
    return render_template('question.html')


if __name__ == '__main__':
    app.run(debug=True)

查询

 

增加数据

删除数据

修改数据