每次我在我的共享文件夹中生成某些内容时,都会重建 index.ts 文件,并且导出按字母顺序排列。这似乎打破了对我的依赖。手动更改顺序,以便在具有依赖项的类之前导出依赖项,使其再次工作。
如果我们有app/shared/auth.guard.ts
:
import { Injectable } from '@angular/core';
import { CanActivate, Router, ActivatedRouteSnapshot } from '@angular/router';
import { Observable } from 'rxjs/Observable';
import { AuthService, User } from './';
@Injectable()
export class AuthGuard implements CanActivate {
constructor(private accountService: AuthService, private router: Router) { }
canActivate(next: ActivatedRouteSnapshot): Observable<boolean> {
let result = this.accountService.currentUser.first().map(user => user != null);
let route: any[] = ['/login'];
if (next.url.length) {
route.push({ redirectUrl: next.url });
}
result.subscribe(isLoggedIn => {
if (!isLoggedIn) {
this.router.navigate(route);
}
});
return result;
}
}
和app/shared/account.service.ts
:
import { Injectable } from '@angular/core';
import { Observable } from 'rxjs/Observable';
import { BehaviorSubject } from 'rxjs/BehaviorSubject';
import { User } from './';
const LOCAL_STORAGE_KEY = 'currentUser';
@Injectable()
export class AuthService {
private currentUserSubject: BehaviorSubject<User>;
constructor() {
this.currentUserSubject = new BehaviorSubject<User>(this.getUserFromLocalStorage())
this.currentUserSubject.subscribe(user => this.setUserToLocalStorage(user));
}
logIn(userName: string, password: string) : Observable<User> {
this.currentUserSubject.next({
id: userName,
userName: userName,
email: userName
});
return this.currentUser.first();
}
logOut() {
this.currentUserSubject.next(null);
}
get currentUser(): Observable<User> {
return this.currentUserSubject.asObservable();
}
private getUserFromLocalStorage(): User {
let userString = localStorage.getItem(LOCAL_STORAGE_KEY);
if (!userString) {
return null;
}
return JSON.parse(userString);
}
private setUserToLocalStorage(user: User) {
if (user) {
localStorage.setItem(LOCAL_STORAGE_KEY, JSON.stringify(user));
}
else {
localStorage.removeItem(LOCAL_STORAGE_KEY);
}
}
}
这不起作用:
export * from './auth.guard';
export * from './auth.service';
Unhandled Promise rejection: Error: Cannot resolve all parameters for 'AuthGuard'(undefined, Router). Make sure that all the parameters are decorated with Inject or have valid type annotations and that 'AuthGuard' is decorated with Injectable.
这有效:
export * from './auth.service';
export * from './auth.guard';
据我所知,这并不适用于所有人。例如,我的用户模型可以在身份验证服务后导出,并且工作正常。
我希望我不必每次都手动更改它。有可用的解决方法吗?我可以用不同的方式构造文件吗?
依赖项来自package.json
:
"@angular/common": "^2.0.0-rc.2",
"@angular/compiler": "^2.0.0-rc.2",
"@angular/core": "^2.0.0-rc.2",
"@angular/forms": "^0.1.0",
"@angular/http": "^2.0.0-rc.2",
"@angular/platform-browser": "^2.0.0-rc.2",
"@angular/platform-browser-dynamic": "^2.0.0-rc.2",
"@angular/router": "^3.0.0-alpha.7",
"bootstrap": "^3.3.6",
"es6-shim": "0.35.1",
"moment": "^2.13.0",
"ng2-bootstrap": "^1.0.17",
"reflect-metadata": "0.1.3",
"rxjs": "5.0.0-beta.6",
"slideout": "^0.1.12",
"systemjs": "0.19.26",
"zone.js": "0.6.12"
开发依赖:
"angular-cli": "1.0.0-beta.6"