Breaking News: Grepper is joining You.com. Read the official announcement!

mongo db get child result with array of parent ids

Jed Bartolo answered on June 8, 2022 Popularity 1/10 Helpfulness 1/10

answer mongo db get child result with array of parent ids

mongo db get child result with array of parent ids

Comment

db.collection.aggregate([
  {
    $match: {
      tags: "b", // add your search
      childs: { $ne: [] }
    }
  },
  {
    $lookup: {
      from: "collection",
      let: { childs: "$childs" },
      as: "ids",
      pipeline: [
        {
          $match: {
            $expr: { $in: ["$id", "$$childs"] },
            tags: { $ne: "b" } // add your search
          }
        }
      ]
    }
  },
  {
    $project: {
      id: 1,
      ids: {
        $reduce: {
          input: "$ids",
          initialValue: [],
          in: { $concatArrays: ["$$value", ["$$this.id"]] }
        }
      }
    }
  }
])

Popularity 1/10 Helpfulness 1/10 Language javascript

Source: Grepper

Tags: get ids javascript parent

Link to this answer
Share Copy Link

Contributed on Jun 08 2022

Jed Bartolo

0 Answers Avg Quality 2/10

Continue with Google

By continuing, I agree that I have read and agree to Greppers's Terms of Service and Privacy Policy.

mongo db get child result with array of parent ids

Contents

More Related Answers

mongo db get child result with array of parent ids

Grepper

Documentation

Social

Legal

Contact

Oops, You will need to install Grepper and log-in to perform this action.