（三）sequelize postgres增删改

let account = Account.build({
    id: Date.now(),
    account: ‘4619test‘,
    password: ‘4619test‘
});

console.log(account);   //account为对象实例

Account.create({
    id: Date.now(),
    account: ‘4619test‘,
    password: ‘4619test‘
}).then(account => {
    console.log(account);   //保存成功后返回对象实例
}, err => {
    console.log(err);
});

//等同于

Account.bulkCreate([{
    id: Date.now() - 100,
    account: ‘4619test‘,
    password: ‘4619test‘
}, {
    id: Date.now(),
    account: ‘4619test1‘,
    password: ‘4619test1‘
}]).then(res => {
    console.log(res);  //返回值为实例数组
}, err => {
    console.log(err);
});

//实例对象删除
Account.findById(‘1528273928488‘).then(row => {
    return row.destroy(); //row为实例，要先判断是否为null
}).then(() => {
    //删除成功，返回空数组，不接收
});

//模型根据条件删除（多条处理）
Account.destroy({
    where: {           //各种条件，符合就删除
        id: ‘test7‘
    }
}).then(res => {
    console.log(res);  //返回影响条数
}, err => {
    console.log(err);
});

//修改数据放在方法中,实例对象更新
Account.findById(‘1528276108795‘).then(row => {
    return row.update({
        account: ‘update‘
    });
}).then(res => {
    console.log(res); //返回修改后的实例对象
}, err => {
    console.log(err);
});

//模型根据条件更新（多条处理）
Account.update({
    account: ‘461912‘
}, {
    where: {
        password: [‘4619test‘, ‘4619test1‘]
    }
}).then(res => {
    console.log(res);  //[2]
}, err => {
    console.log(err);
});

//需要先赋值后修改
Account.findById(‘1528276108795‘).then(row => {
    row.account = ‘save‘;
    return row.save();
}).then(res => {
    console.log(res); //返回修改后的实例对象
}, err => {
    console.log(err);
});