当页面改变时,什么可以触发加载所有商店状态?

时间:2016-06-28 19:38:09

标签: typescript angular rxjs5 ngrx

我正在使用 ngrx / store ngrx / effects ngrx / router

我的效果是这样的:

 @Effect() loadOneProduct$ = this.updates$
    .whenAction(LOAD_ONE_PRODUCT)
    .switchMap(() => this.productService.loadOneProduct())
    .map(oneProduct => ({ type: LOAD_ONE_PRODUCT_SUCCESS, payload: oneProduct }));

 @Effect() loadOneWorker$ = this.updates$
    .whenAction(LOAD_ONE_WORKER)
    .switchMap(() => this.workerService.loadOneWorker())
    .map(oneWorker => ({ type: LOAD_ONE_WORKER_SUCCESS, payload: oneWorker }));

一开始,商店状态是这样的:

{
  company: { name: 'Google' },
  products: {},
  workers: {}
}

1)运行this.store.dispatch({ type: LOAD_ONE_PRODUCT });后,它变成了这样:

{
  company: { name: 'Google' },
  products: {
    oneProduct: {
      label: 'Phone'
    } 
  },
  workers: {}
}

2)运行this.store.dispatch({ type: LOAD_ONE_WORKER });后,它变成了这样:

{
  company: { name: 'Google' },
  products: {
    oneProduct: {
      label: 'Phone'
    } 
  },
  workers: {
    oneWorker: {
      name: 'Tom'
    } 
  },
}

3)接下来当我去另一个PAGE时,

{{store|async|json}}

ngOnInit()
{
   this.subscription = this.store
      .select(x => x.products && x.products.oneProduct)
      .subscribe(oneProduct => {
        // Got undefined here. I suppose I can get the latest value from the store
        console.log(oneProduct);
      });

    // Everything will become correct if I `dispatch` any action
    // And I created a action called TEST, no reducer for it, which means won't change store state, also works
}

现在{{store|async|json}}显示:

{
  company: { name: 'Google' },
  products: {},
  workers: {}
}

我的所有州都回到了初始状态。不仅products消失,而且workers消失。 (注意:workers也会消失。)

(但是,在Chrome扩展程序Redux工具中,状态树始终显示正确。)

如果我添加一个按钮并手动使用ChangeDetectorRef,请执行this._cdRef.detectChanges();{{store|async|json}}仍会显示初始状态。 (所以似乎与区域无关)

但是,如果我之后发出一些行动,productsworkers都将返回该州。 {{store|async|json}}也正确显示。

由于在Chrome扩展Redux工具中,状态树始终显示正确。所以我猜它只是没有正确加载。我的问题是当页面改变时,什么可以触发加载所有商店状态?感谢

1 个答案:

答案 0 :(得分:0)

似乎是一个Angular 2问题:

检查ConstraintViolation

并由

修复

https://github.com/ngrx/store/issues/171