Getters shouldn't be subject to validation

[tarqd]

Currency = {
  type: Number,
  min: 0,
  set: function(v) {
    if (typeof v === 'string' && v.length > 1 && v[0] === '$') {
      return parseFloat(v.substr(1)) * 100;
    } else {
      return v;
    }
  },
  get: function(v) { // fails validatation when used
    return '$' + (v / 100).toFixed(2);
  }
};

var User = new Schema({
    cash: Currency
});

var user = new User({cash: "$2.50"});
console.log(user.cash); // error

If getters are meant for display-only I don't think they should be subject to validation (especially since we're generating it, obviously we're going to be okay with the output)

[tarqd]

In addition this the setter doesn't work because it's never called ("$2.50" isn't a number, but I setters should be called first in case they can be converted into the proper format)

[aheckmann]

the setter/casting order issue is an open ticket. kind of surprised no one mentioned this use case about getters before.