Simple Schema inserting "" into database

When I submit a form that has a blank input field the database is populating with "". If the field is required it should error but it doesn’t. Is there a way to prevent this from happening. I’m currently using:

MongoDb Example - see name.last for empty field

  "_id": "R2xGMGoKDJc3CvwJ2",
  "userId": "fYHKGTRhZvPKCETHQ",
  "createdAt": "2017-05-08T03:08:02.597Z",
  "name": {
    "first": "John",
    "last": ""

Path: Schema

ProfileCandidate.schema = new SimpleSchema({
  userId: {
    type: String,
  createdAt: {
    type: Date,
  name: Object,
    'name.first': String,
    'name.last': String,
}, {
  clean: {
    filter: true,
    autoConvert: true,
    removeEmptyStrings: true,
    trimStrings: true,
    getAutoValues: false,
    removeNullsFromArrays: true,

  userId: String,
  createdAt: Date,
  name: Object,
    'name.first': String,
    'name.last': String,

How are you calling the insert method, and with what arguments?

Consider using min: n in your schema.