相关疑难解决方法(0)

Facebook Flux调度员明确禁止ActionCreators派遣其他ActionCreator.这种限制可能是一个好主意,因为它会阻止您的应用程序创建事件链.

但是,只要存储包含异步ActionCreator中彼此依赖的数据的存储,就会出现问题.如果不CategoryProductsStore依赖于CategoryStore似乎没有办法避免事件链,而不诉诸推迟后续行动.

场景1: 包含类别中的产品列表的商店需要知道应该从哪个类别ID获取产品.

var CategoryProductActions = {
  get: function(categoryId) {
    Dispatcher.handleViewAction({
      type: ActionTypes.LOAD_CATEGORY_PRODUCTS,
      categoryId: categoryId
    })

    ProductAPIUtils
      .getByCategoryId(categoryId)
      .then(CategoryProductActions.getComplete)
  },

  getComplete: function(products) {
    Dispatcher.handleServerAction({
      type: ActionTypes.LOAD_CATEGORY_PRODUCTS_COMPLETE,
      products: products
    })
  }
}

CategoryStore.dispatchToken = Dispatcher.register(function(payload) {
  var action = payload.action

  switch (action.type) {
    case ActionTypes.LOAD_CATEGORIES_COMPLETE:
      var category = action.categories[0]

      // Attempt to asynchronously fetch products in the given category, this causes an invariant to be thrown.
      CategoryProductActions.get(category.id)

      ...

场景2: 另一种情况是,当存储更改及其componentWillMount/ componentWillReceiveProps …