How do i access default value in mongoose?

[Nitesh Agarwal]

I am trying something like this

var someSchema = new mongoose.Schema({

_id:String, 

pushToken:String, 

deviceType:{type:String, default:"iPhone"},

deviceDesc:{type:String, default:"6Plus"}, 

deviceStatus:{type:String, default:"Active"},

osVersion:{type:String, default:"8"}

});

someSchema.deviceModel({_id:dJson.deviceId, pushToken:dJson.pushToken,

deviceType:dJson.deviceType||default , deviceDesc:dJson.deviceDesc || defaultValueSetInSchema, 

deviceStatus:dJson.deviceStatus, osVersion:dJson.osVersion 

}).save