threshold-ui/addons/api/addon/models/base.js

import Model from '@ember-data/model';
import { computed } from '@ember/object';

export default class BaseModel extends Model {
  // =attributes

  /**
   * @type {boolean}
   */
  @computed('hasDirtyAttributes', 'isSaving')
  get canSave() {
    return this.hasDirtyAttributes && !this.isSaving;
  }

  /**
   * @type {boolean}
   */
  @computed('canSave')
  get cannotSave() {
    return !this.canSave;
  }
}