Mongoose Schema Error: “Cast to string failed for value” when pushing object to empty array

Question

I have a strange problem and cannot figure out what the problem is. The Error-message doesn\'t help.

I\'m sending an "alarm" to the server and want to save

Answer 1

Maybe it is too late, but here mongoose is assuming that deviceId is not an object and it is of type String

deviceId: {
  type : String,
  index : {
    unique : true,
    dropDups : true
  }
},

SIMPLE SOLUTION:

deviceId: {
  type: {
    type: String
  },
  index: {
    unique: true,
    dropDups: true
  }
},