Rollback model attributes as well as its relationships

ember-data-relational-rollback.js

function rollbackModel() {
  const model = this.get('model');

  if (isArray(model)) {
    model.forEach(m => this._deepRollback(m));
  } else {
    this._deepRollback(model);
  }
}

function _deepRollback(model) {
  model.reload().then(m => {
    m.eachRelationship((key, relationship) => {
      if (relationship.kind === 'belongsTo') {
        this._rollBack(get(m, key));
      } else if (relationship.kind === 'hasMany') {
        get(m, key).forEach(m => this._rollBack(m));
      }
    });
  });
}

function _rollBack(model) {
  if(!isNone(model)) {
    model = get(model, 'content') || model;
    if(model.rollbackAttributes && model.get('hasDirtyAttributes')) {
      model.rollbackAttributes();
    }
  }
}