Question

所以我一直在构建一个应用程序来了解Angular 2并在终端遇到这个问题：

    app/teacher-detail.component.ts(17,3): error TS2369: A parameter property is only allowed in a constructor implementation.
    [0] app/teacher-detail.component.ts(18,3): error TS2369: A parameter property is only allowed in a constructor implementation.
    [0] app/teacher-detail.component.ts(23,19): error TS2339: Property '_routeParams' does not exist on type 'TeacherDetailComponent'.
    [0] app/teacher-detail.component.ts(24,8): error TS2339: Property '_teacherService' does not exist on type 'TeacherDetailComponent'.

现在，我似乎无法找到问题所在。我的其他列表（student-detail.component.ts）的格式几乎与此列表完全相同，但不会弹出错误。

import {Component, Input, OnInit} from 'angular2/core';
import { RouteParams } from 'angular2/router';

import {Teacher} from './teacher';
import { TeacherService } from './teacher.service';

@Component({
  selector: 'my-teacher-detail',
  templateUrl:'app/teacher-detail.component.html',
})

export class TeacherDetailComponent implements OnInit {
@Input() teacher: Teacher;


contructor(
    private _teacherService: TeacherService,
    private _routeParams: RouteParams) {

    }

ngOnInit() {
    let id =  +this._routeParams.get('id');
    this._teacherService.getTeacher(id)
        .then(teacher => this.teacher = teacher);
}
goBack() {
window.history.back();
}

}

查看Chrome开发工具，我看到了：

EXCEPTION: Error: Uncaught (in promise): EXCEPTION: Error during instantiation of Router! (RouterLink -> Router).
ORIGINAL EXCEPTION: Configuration '/detail/:id' conflicts with existing route '/detail/:id'
ORIGINAL STACKTRACE:
Error: Configuration '/detail/:id' conflicts with existing route '/detail/:id'

让我想到的是，它是在我的@RouteConfig的应用文件中吗？

@RouteConfig([
{
    path: '/dashboard',
    name: 'Dashboard',
    component: DashboardComponent,
    useAsDefault: true
},
{
    path: '/detail/:id',
    name: 'TeacherDetail',
    component: TeacherDetailComponent
},
{
    path: '/detail/:id',
    name: 'StudentDetail',
    component: StudentDetailComponent
},
{
    path: '/teachers',
    name: 'Teachers',
    component: TeachersComponent

},
{
    path: '/students',
    name: 'Students',
    component: StudentsComponent
},
])

我完全陷入困境，无法弄清问题是什么。我怀疑它与/ detail / id有关，但不确定如何继续，因为删除其中一个并不能解决整个问题。

提前感谢您的帮助！

Answer 1

好的，感谢JB Nizet帮助我。

今天我了解到我在路由器中不能有两条路径相同的路径。我将不得不找出一种不同的方式来路由应用程序的这个特定部分。

另外......他发现了一个拼写错误（构造函数而不是构造函数）。

是的，额头见了桌子。几次。昨晚盯着代码三个小时，我从来没有抓住它。

感谢JB Nizet的帮助。

Angular 2错误：'/ detail /：id'与现有路由'/ detail /：id'冲突

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