Hi Angular:
I am circling back to a problem I encountered a while ago and didn't have
time to resolve. The story is that I have a angular 1.7 app with a rather
eccentric setup. (It runs as both standalone website and a plugin for
another angular app with different bootstrap code path)
I wanted to upgrade our dependencies and part of this implies I will have
to start using angular 7. However, the static injector is starting to give
me issues.
The SDK I use requires me to instantiate services (from their library) and
pass it to its application context during app init. I need to do something
as followed.
class AppComponent implements OnDestroy, OnInit {
constructor(
private appContext: AppContextService, private navigationService:
NavigationService) {
}
public ngOnInit(): void {
this.appContext.ngInit({ navigationService: this.navigationService });
}
}
Where AppContextService and NavigationService are both provided by the SDK.
However, after upgrading to angular 7 I am starting to see this error
during my app launch.
(object): Error: StaticInjectorError(AppModule)[NavigationService ->
Router]:
StaticInjectorError(Platform: core)[NavigationService -> Router]:
NullInjectorError: No provider for Router!
Note that NavigationService is dependent of @angular/router and I have
RouterModule.forRoot in my app module, also I remembered to export
RouterModule in my app module.
This is extremely confusing because I actually tried to move the
instantiation of NavigationService to the init method and see the behavior
as followed
constructor(
private injector: Injector,
private appContext: AppContextService,
) {
.....
}
public ngOnInit(): void {
let router: Router = this.injector.get(Router);
if (!router) {
console.warn(`no router`);
} else {
console.warn(`yes router`);
}
let navigationService: NavigationService = this.injector.get(
NavigationService);
this.appContext.ngInit({ navigationService: navigationService });
....
Output
*yes router*
*(object): Error: StaticInjectorError(AppModule)[NavigationService ->
Router]: StaticInjectorError(Platform: core)[NavigationService ->
Router]: NullInjectorError: No provider for Router!*
How is this even possible?
(Apologies for asking such a vague question. I am currently trying to
create a minimal reproduction with very little luck due to the complicated
way our app is set up.) Just wondering if anyone can spot the issue or
provide some information that I can work on while I try to come up with a
more concise problem description)
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