adapter.js

export default DS.ActiveModelAdapter.extend({
  namespace: 'api',
  ajaxError: function(jqXHR) {
    var error;
    error = this._super.apply(this, arguments);
    if (jqXHR && jqXHR.status === 401) {
      window.location.href = '/users/sign_in';
    }
    return error;
  }
});