[英]Angular AuthGuard canActivate with observable from promise not working
[英]Angular 2 CanActivate as promise, that resolves from another component
我試圖解決canActivate鈎從另一個組件和注入的服務,但卡住了。 提供警衛和工人服務,並且可以單獨工作。 (返回真實的表單守衛將重新路由該路由。成功訂閱worker發射器將觸發火災。)代碼為: worker.service.ts
@Injectable()
export class WorkersService {
public mainCmpState: EventEmitter<any>;
constructor() {
this.mainCmpState = new EventEmitter();
}
toggleMainCmpState(bool) {
console.log('TOGGLE MAIN CMP' , bool);
this.mainCmpState.emit(bool);
}
Guard.service.ts
@Injectable()
export class GuardService implements CanActivate {
constructor(public workers: WorkersService) {}
canActivate() {
console.log('CAN ACTIVATE IS CALLED');
return Observable.create(observer => {
this.workers.mainCmpState.subscribe((data) => {
console.log('CAN ACTIVATE SUB', data);
observer.next(true);
observer.complete();
});
});
}
some.component.ts
//on some test button click
this.workers.toggleMainCmpState(true);
我做錯了什么? 我也曾嘗試過Promises。
我在先前的評論中試圖解釋的是,不需要將可觀察變量的訂閱包裝在新創建的可觀察變量中。
如果我們將其與Promise進行比較:
您在這里所做的就是這樣:
canActivate() {
return new Promise((resolve, reject) => {
this.somePromiseYouAlreadyHave.then(() => {
resolve(true)
})
})
}
您應該做什么:
canActivate() {
return this.somePromiseYouAlreadyHave;
// assuming this promise will be resolve with value true
}
回到我們的Observable,而不是做:
canActivate() {
console.log('CAN ACTIVATE IS CALLED');
return Observable.create((observer: Subject<boolean>) => {
this.workers.mainCmpState.subscribe(res => {
observer.next(true);
})
});
}
你應該做 :
return canActivate() {
return this.workers.mainCmpState;
}
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