routes.js

const routes = {
  '/posts': {
    '/:id': function* show({ params: { id } }) {
      yield call(loadPost, id); // Wait for loading data
      yield PostShow; // Component change
    },
    '/:id/edit': [function* edit({ params: { id } }) {
      yield call(loadPost, id); // Wait for loading data
      yield PostEdit;
    }, function* dirtyCheck() {
      if (yield select(isDirty)) {
        yield false; // Prevent
      }
    }],
    '/:id/update': function* update({ params: { id } }) {
      yield take(SUCCESS_UPDATE_POST);
      yield `/posts/${id}`; // Redirect
    },
  }
};