Sequelize - 更新记录，并返回结果 [英] Sequelize - update record, and return result

问题描述

我正在使用 MySQL 的 sequelize.例如，如果我这样做:

I am using sequelize with MySQL. For example if I do:

models.People.update({OwnerId: peopleInfo.newuser},
        {where: {id: peopleInfo.scenario.id}})
        .then(function (result) {
            response(result).code(200);

        }).catch(function (err) {
        request.server.log(['error'], err.stack);
       ).code(200);
    });

无论人员模型是否成功更新，我都无法获取信息.变量 result 只是一个只有一个元素的数组，0=1

I am not getting information back if the people model was succesfully updated or not. Variable result is just an array with one element, 0=1

如何确定记录是否已更新.

How can I know for certain that the record was updated or not.

推荐答案

这就是我认为您正在寻找的.

Here's what I think you're looking for.

db.connections.update({
  user: data.username,
  chatroomID: data.chatroomID
}, {
  where: { socketID: socket.id },
  returning: true,
  plain: true
})
.then(function (result) {
  console.log(result);   
  // result = [x] or [x, y]
  // [x] if you're not using Postgres
  // [x, y] if you are using Postgres
});

来自 Sequelize docs:承诺返回一个包含一个或两个元素的数组.第一个元素 x 始终是受影响的行数，而第二个元素 y 是实际受影响的行(仅在带有 options.returning 设置为 true.)

From Sequelize docs: The promise returns an array with one or two elements. The first element x is always the number of affected rows, while the second element y is the actual affected rows (only supported in postgres with options.returning set to true.)

假设您使用的是 Postgres，您可以使用 result[1].dataValues 访问更新后的对象.

Assuming you are using Postgres, you can access the updated object with result[1].dataValues.

您必须设置 returning: true 选项来告诉 Sequelize 返回对象.而 plain: true 只是返回对象本身，而不是返回其他可能没用的杂乱元数据.

You must set returning: true option to tell Sequelize to return the object. And plain: true is just to return the object itself and not the other messy meta data that might not be useful.

这篇关于Sequelize - 更新记录，并返回结果的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！