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Angular2 RC 5. No component factory found for dynamically loaded components

Tags:

angular

I'm trying to update my dynamic component loader from RC4 to RC5 since the ComponentResolver is deprecated. I've updated the loader to the following

@Component({
    selector: 'component-dispatcher',
    template: `<div #container></div>` // Define the template here because of its brevity
})
export class ComponentDispatcherComponent implements OnInit, OnDestroy {
    @Input() component:any; // Some dynamic component to render
    @Input() options:any;   // Component configuration, optional
    @Input() data:any;      // Data to render within the component

    // Inject the dynamic component onto the DOM
    @ViewChild("container", {read: ViewContainerRef}) container:ViewContainerRef;

    private componentReference:ComponentRef<any>;

    constructor(private resolver:ComponentFactoryResolver) {
    }

    ngOnInit() {
        // Create our component now we're initialised
        let componentFactory = this.resolver.resolveComponentFactory(this.component);
        this.componentReference = this.container.createComponent(componentFactory);
        this.componentReference.instance.data = this.data;
        this.componentReference.instance.options = this.options;
    }

    ngOnDestroy() {
        // If we have a component, make sure we destroy it when we lose our owner
        if (this.componentReference) {
            this.componentReference.destroy();
        }
    }
}

And attempt to dynamically load the following component into the DOM

@Component({
    selector: 'text-cell',
    pipes: [IterableObjectPipe],
    templateUrl: './text-cell.component.html',
    styles: ['.fieldName { font-weight: bold; }']
})
export class TextCellComponent implements OnInit {
    // Data to render within the component
    @Input() data: any;
    @Input() record: any;

    // Configuration of what data to display
    @Input() options: {
        excludeFieldNames: boolean,
        translation: string
    };

    constructor() {
    }

    ngOnInit() {
        setTimeout(() => {
            //console.log('***************************** ngOnInit...textCell ***********************');
            this.options.translation = '' + (_.get(this.options, 'translation') || 'fields');
        });
    }
}

Yet when I do this with my TextCellComponent or any other component within the app I get the following error

ORIGINAL EXCEPTION: No component factory found for TextCellComponent
ORIGINAL STACKTRACE:
Error: No component factory found for TextCellComponent
at NoComponentFactoryError.BaseException [as constructor]      
(webpack:///./~/@angular/core/src/facade/exceptions.js?:27:23)
at new NoComponentFactoryError 

I've completed the steps in

https://angular.io/docs/ts/latest/cookbook/rc4-to-rc5.html

but I seem to be missing something. I've tried adding the components to the bootstrapping and defining them globally with no luck. Any suggestions would be helpful.

EDIT

Adding the module definition

@NgModule({
    imports: [
        BrowserModule, 
        HttpModule, 
        FormsModule, 
        ReactiveFormsModule, 
        ...MATERIAL_MODULES
    ],
    declarations: [
        ...APPLICATION_PIPES, 
        ...APPLICATION_COMPONENTS, 
        ...APPLICATION_DIRECTIVES, 
        CygnusComponent,
        // Component declarations
        // TODO: refactor to appropriate modules
        ...
        ComponentDispatcherComponent,
        TextCellComponent,
        ...
    ],
    bootstrap: [
        ApplicationComponent
    ],
    providers: [
        ...APPLICATION_PROVIDERS, 
        AppStore
    ]
})
export class ApplicationComponent {}
like image 714
JME Avatar asked Sep 07 '16 15:09

JME


3 Answers

All components about to be loaded "dynamically" need to be declared in the entryComponents section of your module. In other words you should end up with something like:

@NgModule({
    imports: [BrowserModule, HttpModule, FormsModule, ReactiveFormsModule, ...MATERIAL_MODULES],
    declarations: [...APPLICATION_PIPES, ...APPLICATION_COMPONENTS, ...APPLICATION_DIRECTIVES, CygnusComponent,
        // Component declarations
        // TODO: refactor to appropriate modules
        ...
        ComponentDispatcherComponent,
        TextCellComponent,
        ...
    entryComponents: [TextCellComponent]
    bootstrap: [ApplicationComponent],
    providers: [...APPLICATION_PROVIDERS, AppStore]
})
export class ApplicationComponent{

Please note that you need to list the TextCellComponent in both the declarations and entryComponents section.

like image 123
pkozlowski.opensource Avatar answered Oct 18 '22 21:10

pkozlowski.opensource


You may want to check your import paths. In my case, one file import used uppercase while the other used lowercase.

//file 1
import { IRComponent } from "./components/IR/IR.component";
//file 2
import { IRComponent } from "./components/ir/ir.component";

The give away was in the Chrome network tab, I noticed that the file was being loaded twice (once for each spelling).

like image 1
Alan Avatar answered Oct 18 '22 20:10

Alan


Let's say TextCellComponent is declared in FooModule and your component responsible for creating dynamic content is in module BarModule.

In such case FooModule needs to be imported into BarModule

@NgModule({
 imports: [FooModule],
declarations: [ComponentDispatcherComponent]
})
export class BarModule {}

To my eyes that kinda compromises the idea of things being dynamic. I simply want a component that will create any component I send it to by class reference. If anyone has a decent solution I'd be glad to hear it.

like image 1
George Knap Avatar answered Oct 18 '22 21:10

George Knap