Add a element to array whith a random value

Working with Data
1

Hi guys, does any one knows how can i add an element to an array whit a random value. I was trying using $rand in a push operator but it does not work

2

There is nothing special to do. Simply use the random number generate of your choice as the value. For example, in JS with Math.random() in mongosh.

db.test.insertOne( { _id:1 , myArray : [] })
{ acknowledged: true, insertedId: 1 }
db.test.find()
{ _id: 1, myArray: [] }
db.test.updateOne( { _id:1 } , { $push : { myArray : Math.random() }})
{ acknowledged: true,
  insertedId: null,
  matchedCount: 1,
  modifiedCount: 1,
  upsertedCount: 0 }
db.test.find()
{ _id: 1, myArray: [ 0.5932913987369441 ] }
2 Likes
3

Yesss. workss perfect, thankyou

4

Please mark my post as the solution so the thread can be closed and others know they can follow the suggestion.