Form Objects: Example of Complete Form Object

formObjects1.js

var _ = require('underscore')

var NewStudentForm = function(data) {
  this.data = data
  this.errors = [] // for storing validation errors encountered
}

NewStudentForm.prototype = _.extend(NewStudentForm.prototype, {
  
  process: function() {
    if (this.isValid()) {
      this.persist() // only persist if data is valid
    }
    
    return this
  },

  isValid: function() {
    // perform all validations, and store
    // errors if validations fail
    if (_.isUndefined(this.data.firstName)) {
      this.errors.push(new Error('first name is required'))
    }
    if (_.isUndefined(this.data.lastName)) {
      this.errors.push(new Error('last name is required'))
    }
    // ...
    
    // return boolean representing if
    // any errors were encountered during validation
    return this.errors.length === 0
  },

  persist: function() {
    // off-load persistence to a service object
    return new CreateNewStudent(this.data).run()
  }

})