I have a route called home and it has three child routes, documents, mail and trash. In the home route component it has a variable called 'user'. I know there are a few ways of passing info between parent and child components highlighted here, but how am I suppose to pass info between parent/child routes.
{ path: 'home', component: HomeComponent, children: [
{ path: 'documents', component: DocumentsComponent },
{ path: 'mail', component: MailComponent },
{ path: 'trash', component: TrashComponent },
]
},
Service
import { Injectable } from '@angular/core';
@Injectable()
export class HomeService {
// Mock user, for testing
myUser = {name:"John", loggedIn:true};
// Is Super Admin
isLogged():boolean {
if(this.myUser.role == true){
return true ;
}
return false ;
}
}
Component
constructor(public router: Router, public http: Http, private homeService: HomeService) {
}
isLogged(){
return this.homeService.isLogged();
}
Template
<div class="side-nav fixed" >
<li style="list-style: none">
<img alt="avatar" class="circle valign profile-image" height="64" src=
"../images/avatar.jpg" width="64">
<div class="right profile-name">
<!-- Value not changing even with service -->
{{myUser.role}}
</div>
</li>
You may use a common service to pass data like explained in the Angular Documentation
Basically you may create a Service which will have a user object, which can be updated once your parent route gets loaded or with some action on parent component.
UserService
import { Injectable } from '@angular/core';
import { Subject } from 'rxjs/Subject';
@Injectable()
export class UserService {
// Observable user
user = new Subject<string>();
}
And then when the child route component gets loaded you may retrieve the value from the Service.
HomeComponent
@Component({
...
})
export class HomeComponent{
...
constructor(private userService:UserService ){}
someMethod = () =>{
this.userService.user.next(<pass user object>);
}
}
MailComponent
@Component({
...
})
export class HomeComponent{
...
constructor(private userService:UserService ){
this.userService.user.subscribe(userChanged);
}
userChanged = (user) => {
// Do stuff with user
}
}
Service object will be same instance in child if you add the provider in the parent.
Check out :- https://angular.io/docs/ts/latest/guide/router.html#!#link-parameters-array
You can pass data while changing routes on click as :-
<a [routerLink]="['/crisis-center', { foo: myVar }]">Crisis Center</a>
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