How to change all mongodb value?

Question

MongoDB

Is it possible to redo the change request more rationally?

User.findOne({_id: token.id}, function(err, user) {
    
    // для кожного елементу 
    for(var elem of user.data.categories) {

      // скинути баланс до нуля
      User.update({
        "_id" : token.id,
        'data.categories.name': elem.name
      }, {
        '$set': {
          'data.categories.$.balance': 0
        }
      }, function(){
        if(err) console.log(err)
      })

    }
  })

Since it is not possible to immediately update everything through User.update

Answer 1

use the "multi" key
https://docs.mongodb.org/manual/reference/method/d...

Answer 2

You can read the document, reset everything and write it back (with a 2-phase commit or lock).
You can also revise the structure of the document, since you need such operations, for example, you can try to store categories not as an array, but as a dictionary:

data:{
  categoryName1:{ balance: 0},
  categoryName2:{ balance: 0}
}

Then it will be possible to update all categories at once by direct keys