navigateActionExample.js

  /**
   * The router runs this navigate action once a new route is resolved.
   * This returns a promise that must be satisfied before the render
   * starts. The promise consists of all actions that each handler
   * in the route declares that it needs before navigating.
   *
   * WHEN we upgrade react-router to 1.0, we should revisit this design
   * https://github.com/rackt/react-router/pull/1158
   *
   * @return {Promise} to satisfy all the dependencies of the route
   */
  navigate: (actionContext, payload) => {
    actionContext.dispatch('CHANGE_ROUTE', payload);

    var handlers = payload.routes.map((route) => route.handler);
    var allActionDependencies = _(handlers.map((h) => h.navigateActionDependencies)).
      chain().flatten().compact().value();

    var allPromises = allActionDependencies.map(
      // pass the payload from this navigate action
      (action) => actionContext.executeAction(action, payload)
    );

    // navigation ready once all dependent promises are satisifed
    return Q.all(allPromises);
  },