Child routing in Angular 5 not working

Question

I am having trouble routing in Angular 5.

I would like to support the following URL's

This one works:

/post  

This one doesn't, it redirects me to my NotFoundComopnent

/post/test-post-title

My AppRoutingModule

export const routes: Routes = [
    { path: 'post', loadChildren: 'app/feature/post/post.module#PostModule' },
    { path: '**', component: NotFoundComponent },

];

export class AppRoutingModule { }

My PostRoutingModule:

const routes: Routes = [
    {
        path: '',
        component: PostHomeComponent,

        children: [
            { 
                path: ':slug', component: PostDetailComponent 
            }
        ]
    }
];

@NgModule({
    imports: [RouterModule.forChild(routes)],
    exports: [RouterModule]
})

export class PostRoutingModule { }

Updated to show the PostDetailComponent

export class PostDetailComponentimplements OnInit {

  constructor(
    private route: ActivatedRoute
  ) {}

  ngOnInit() {
    const id = +this.route.snapshot.paramMap.get('slug');
    console.log(id)
  }

}

Answer 1

When you define a child route using "children: [{ ... }]" as in your PostRoutingModule, you must have a router outlet inside your PostHomeComponent for this child component to be injected in.

In other words, if Component B is child of Component A, you can't expect to inject them both into the same router outlet that you have on app level.

Either, have a router outlet inside PostHomeComponent - this may or may not be what you want as you would end up displaying both Parent and Child components at the same time.

Or, change your routes to this:

const routes: Routes = [
    {
        path: '',
        component: PostHomeComponent
    },
    { 
        path: ':slug', component: PostDetailComponent 
    }

];