我有一个http服务调用,在调度时需要两个参数：
@Injectable()
export class InvoiceService {
. . .
getInvoice(invoiceNumber: string,zipCode: string): Observable<Invoice> {
. . .
}
}
我如何随后将这两个参数传递给我的效果中的this.invoiceService.getInvoice()？
@Injectable()
export class InvoiceEffects {
@Effect()
getInvoice = this.actions
.ofType(InvoiceActions.GET_INVOICE)
.switchMap(() => this.invoiceService.getInvoice()) // need params here
.map(invoice => {
return this.invoiceActions.getInvoiceResult(invoice);
})
}
您可以访问操作中的有效内容：
@Injectable()
export class InvoiceEffects {
@Effect()
getInvoice = this.actions
.ofType(InvoiceActions.GET_INVOICE)
.switchMap((action) => this.invoiceService.getInvoice(
action.payload.invoiceNumber,action.payload.zipCode
))
.map(invoice => this.invoiceActions.getInvoiceResult(invoice))
}
或者您可以使用ngrx / effects中的toPayload函数来映射操作的有效负载：
import { Actions,Effect,toPayload } from "@ngrx/effects";
@Injectable()
export class InvoiceEffects {
@Effect()
getInvoice = this.actions
.ofType(InvoiceActions.GET_INVOICE)
.map(toPayload)
.switchMap((payload) => this.invoiceService.getInvoice(
payload.invoiceNumber,payload.zipCode
))
.map(invoice => this.invoiceActions.getInvoiceResult(invoice))
}
