升级 ngrx 2 -> 4。输入解构数组有问题

Question

错误是在 .map.

中的 action 参数后需要一个逗号

将鼠标悬停在 DataActions.AddDataAction 上时也会出现错误，显示 Tuple type '[Action, AppStore]' with length '2' cannot be assigned to tuple with length '5'

@Effect() addData$ = this.actions$
    .ofType(DataActions.ADD_DATA)
    .withLatestFrom(this.store$)
    .map(([action: DataActions.AddDataAction, store: AppState]) => [action.payload, reducer.dataResults(store)])
    .etc...

这是我的 package.json

中的相关软件包及其版本

"@ngrx/effects": "^4.1.1",
"@ngrx/router-store": "^4.1.1",
"@ngrx/store": "^4.1.1",
"@ngrx/store-devtools": "^4.1.1",
"typescript": "~2.4.0",

Answer 1

withLastFrom() 实际上 returns 一个元组类型并声明元组中每个元素的类型，我们需要做类似

的事情

map(([action, store]: [DataActions.AddDataAction, AppState])=>

升级 ngrx 2 -> 4。输入解构数组有问题

Upgrading ngrx 2 -> 4. Having issue with typing in de-structuring array

angular

typescript

ngrx

ngrx-effects

ngrx-store-4.0