我想动态创建一个 URL 树并在 Angular 的路由器中使用它而不是“魔术”字符串。我有这些课程:
export abstract class UrlNode {
protected parentUrl?: string;
protected abstract shortUrl: string;
constructor(parent: UrlNode) {
this.parentUrl = parent && parent.path;
}
public get segmentUrl(): string {
return this.shortUrl;
}
public get path(): string {
if (!this.parentUrl) {
return this.shortUrl;
}
if (!this.shortUrl) {
return this.parentUrl;
}
return `${this.parentUrl}/${this.shortUrl}`;
}
}
export class Profile extends UrlNode {
protected shortUrl = "profile";
}
export class User extends UrlNode {
public readonly profile: Profile;
public readonly someSubroute: SomeSubroute;
protected shortUrl = "user";
constructor(parent: UrlNode) {
super(parent);
this.profile = new Profile(this);
this.someSubroute = new SomeSubroute(this);
}
}
export class AppTree {
public readonly user: User;
public readonly someRoute: SomeRoute;
constructor() {
this.user = new User(this);
this.someRoute = new SomeRoute(this);
}
}
export const urlTree = new AppTree();
所以我可以使用导航到个人资料
router.navigateByUrl(urlTree.user.profile.path)
并在路由器模块中注册为
path: urlTree.user.profile.segmentUrl
但是用AOT编译的时候会报错。
ERROR in Error: Error encountered resolving symbol values statically. Calling function 'AppTree', function calls are not supported. Consider replacing the function or lambda with a reference to an exported function, resolving symbol urlTree in routes/url-tree.model.ts, resolving symbol urlTree in routes/index.ts, resolving symbol urlTree in index.ts, resolving symbol app-routing.module.ts, resolving symbol AppRoutingModule in app-routing.module.ts, resolving symbol AppRoutingModule in app-routing.module.ts
我怎样才能让它工作?或者也许有人知道一个更好的解决方案来避免项目中的“神奇” URL 和段?