我刚开始在我的angular应用程序中使用NGRX/RXJS,我遇到了这样的情况:我必须从我的组件中分派一个动作,如果属性为空,它会从API中获取数据,并更新Store_1并设置一个属性,然后再分派另一个动作,该动作使用来自Store_1的数据在Store_2中执行一些函数,并在动作1完成后更新状态,并填写“Store_1”。这是我想出来的代码,但我不认为/相信这是最有效的方法,如果我正确使用运算符的话。
if(isEmpty(definition.pluralconfig == null))
{
this.store$.dispatch(new FormDBAction(definition.formId));
let id = definition.id;
this.formLoadSubscription = this.store$.select(getOrderById(id))
.filter(v => v.pluralconfig != null).subscribe(() =>{
this.store$.select<TosModel>(getOrderById(id)).subscribe(updatedDefinition => {
this.store$.dispatch(new OrderDetailAction(updatedDefinition));
});
});
}
else{
this.store$.dispatch(new OrderDetailAction(definition));
}
发布于 2018-06-06 06:06:25
所有这些逻辑的效果应该类似于
//Effects file
@Effect()
loadOrderDetail$: = this.actions$.pipe(
ofType(LOAD_ORDER_DETAIL),
flatMap(action => {
return this.store$.select<TosModel>(getOrderById(action.id)).pipe(first());
})
map(definition => definition.pluralconfig ? new FormDBAction(definition.formId): new OrderDetailAction(definition)})
)
@Effect()
formDb$: = this.actions$.pipe(
ofType(FORM_DB_ACTION),
switchMap(action => {
///call api and fire new FormDbActionSuccess(response.definition) which reducer will store
})
@Effect()
onSuccessOrderDetail$: = this.actions$.pipe(
ofType(FORM_DB_ACTION_SUCESS),
map(action => new OrderDetailAction(action.definition))
//Component
definition$ = this.store.select(getOrderById(id));
store.dispatch( new LoadOrderDetail(id));
看看https://github.com/ngrx/platform/tree/master/projects/example-app中的ngrx示例应用程序,这是我学到最多的
https://stackoverflow.com/questions/50707626
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