Aperta-Validation

controller.js

const Validations = buildValidations({
  pfaQuestion1b: validator('pfa-number', true)
});

export default TaskController.extend(Validations, {
  pfaQuestion1bAnswer: computed('model.nestedQuestions.[]', function() {
    return this.get('model').answerForQuestion('pfa_question_1b');
  }),
  pfaQuestion1b: computed.alias('pfaQuestion1bAnswer.value')
});

pfa-number.js

import BaseValidator from 'ember-cp-validations/validators/base';

const numericMessage = "Must be a number and contain no symbols, or letters, e.g. $1,000.00 should be written 1000";

export default BaseValidator.extend({
  validate(value, options, obj) {
    if(!obj.get('pfa')) { return false; }

    const parsed = parseInt(value);

    if(typeof parsed === 'number' && !isNaN(parsed)) {
      return false;
    }

    return numericMessage;
  }
});

template.hbs

{{nested-question-input ident="pfa_question_1b" owner=model}}
{{error-message elementId="error-for-pfa_question_1b" message=(v-get this 'pfaQuestion1b' 'message')}}