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For one of my project, I am working on MongoDB database and Mongoose as ODM in nestjs project.

One of my collection is looks like this data:

[
  {
    _id: '56cb91bdc3464f14678934ca',
    organization: 'New Circle Ltd',
    rooms: [
      {
        name: 'Alex',
        workId: 'abc',
      },
      {
        name: 'John',
        workId: 'cde',
      },
      {
        name: 'John',
        workId: 'abc',
      },
      {
        name: 'Alex',
        workId: 'cdlw',
      },

      {
        name: 'Alex',
        workId: 'rps',
      },
    ],
  },
];

The requirement is to get one data by id and the data should be like the data provided bellow.

{
    _id: '56cb91bdc3464f14678934ca',
    organization: 'New Circle Ltd',

    rooms: [
      {
        name: 'Alex',
        workIds: ['abc', 'cdlw', 'rps'],
      },
      {
        name: 'John',
        workIds: ['cde', 'abc'],
      },
    ],
  },

Please suggest me how can I get this data

Improve this question
2
  • 1
    Does this answer your question? MongoDB group by array inner-elements Commented Aug 25, 2022 at 4:02
  • The common way of working with this is to $unwind, then $group on a field and you $push (or $addToSet) the data into an array. Commented Aug 25, 2022 at 5:58
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