javascript - 如何在 mongodb 中更新一些具有不同数据的文档

Question

如果我有属于大集合的以下文档的 id 和一个newBusinessId来更新这些文档。像这样的东西：

const newBusinessId = '8abc4cef176aa342154d00c0'
const paymentsIds = ['5aba5cef176aa342154d2345', '5aba5cef176aa342154d6789']

这些 id 属于我数据库中的以下文档：

[
  {
    _id: '5aba5cef176aa342154d2345',
    state: 'MATURE',
    comment: 'some comment 1',
    startComment: 'some different comment 1',
    expense: 2,
    startExpense: 2,
    businessId: '5aba5cef176aa342154d9876'
  },
  {
    _id: '5aba5cef176aa342154d6789',
    state: 'MATURE',
    comment: 'some comment 2',
    startComment: 'some comment 2',
    expense: 3,
    startExpense: 1,
    businessId: '5aba5cef176aa342154d5432'
  },
]

我想用相同的businessId更新这些文档：newBusinessId，状态值INIT 和字段（comment，expense）设置为（startComment，startExpense）的值，所以我可以在更新后得到以下结果：

[
  {
    _id: '5aba5cef176aa342154d2345',
    state: 'INIT',
    comment: 'some different comment 1',
    startComment: 'some different comment 1',
    expense: 2,
    startExpense: 2,
    businessId: '8abc4cef176aa342154d00c0'
  },
  {
    _id: '5aba5cef176aa342154d6789',
    state: 'INIT',
    comment: 'some comment 2',
    startComment: 'some comment 2',
    expense: 1,
    startExpense: 1,
    businessId: '8abc4cef176aa342154d00c0'
  },
]

知道怎么做吗？我很欣赏你的坚强！

Answer 1

为了用同一个对象中另一个字段的值更新一个字段（例如费用= startExpense），您必须遍历，试试这个：

yourModel.find().forEach(
    function (elem) {
        yourModel.update(
            {
                _id: { $in: paymentsIds }
            },
            {
                $set: {
                    state : 'INIT',
                    comment : elem.startComment,
                    expense : elem.startExpense,
                    BusinessId : newBusinessId
                }
            }
        );
    }
);