订阅不可分配给类型路由

Question

我正在尝试设置 canActivate 路由，但出现语法错误（订阅不可分配给类型路由）：

canActivate(route: ActivatedRouteSnapshot, state: RouterStateSnapshot) {
const pin = route.paramMap.get('pin');
let canActivate;
if (pin) {
  return this.partService.getCached(pin).pipe(
     take(1),
     concatMap(p => { 
       if(this.appService.isUserAuthorized(Authorization.canAccessAll_View, p))
       { 
         return of(true);
       }
       return this.partService.getEnrolled(pin,'WW')
  })).subscribe(parts => {
        if(parts)
        {
          parts.forEach(part => {
            if (part.agencyCode == this.appService.user.agencyCode) {
              if (this.appService.isUserAuthorizedToView(part)) {
                canActivate = true;
              } else {
                this.routeToUnauthorized(state.url);
                canActivate = false;
              }

            }
          });
        } 
        return canActivate;       
  });      

}

}

这里的语法有什么问题？任何帮助将不胜感激。

Answer 1

尝试映射而不是订阅。就像 cghislai 提到的，你必须 return 布尔值、Promise 或 Observable；

canActivate(route: ActivatedRouteSnapshot, state: RouterStateSnapshot) {
const pin = route.paramMap.get('pin');
let canActivate = false; // initialize with a false value
if (pin) {
  return this.partService.getCached(pin).pipe(
     take(1),
     concatMap(p => { 
       if(this.appService.isUserAuthorized(Authorization.canAccessAll_View, p))
       { 
         return of(true);
       }
       return this.partService.getEnrolled(pin,'WW');
  }),
  map(parts => {
    if(parts)
        {
          parts.forEach(part => {
            if (part.agencyCode == this.appService.user.agencyCode) {
              if (this.appService.isUserAuthorizedToView(part)) {
                canActivate = true;
              } else {
                this.routeToUnauthorized(state.url);
                canActivate = false;
              }
            }
          });
        } 
        return canActivate;
  }));
}

订阅不可分配给类型路由

Subscription is not assigneable to type route

angular

angular5

angular2-routing