mongorestore only one field of a document i'm trying to restore my users :

{
  _id: ObjectId,
  created_at: Date,
  preferences: String
}


I don't know why but created_at field from my users all reseted. So i need to use my .bson backup file to restore this field but i need to only edit created_at field.

Any idea ?
Import your user data (.bson) to other temporary collection and then use forEach to update documents created_at keys.