valiate_array.js

var mongoose = require('mongoose');
mongoose.connect('localhost', 'testing_enumarray');

var ok = 'car figure'.split(' ');

function validator (v) {
  return v.every(function (val) {
    return ~ok.indexOf(val)
  });
}

var schema = new mongoose.Schema({
    tags: { type: [String], validate: validator }
});

var A = mongoose.model('A', schema);

mongoose.connection.on('open', function () {
  var a = new A;
  a.tags = ['figure', 'car'];
  a.validate(function (err) {
    if (err) console.error(err.stack);
    else console.log('worked');
    mongoose.connection.db.dropDatabase(function () {
      mongoose.connection.close();
    });
  })
});