angular - NullInjectorError: Nema pružatelja za MatDialogRef

Ne mogu ubrizgati MatDialogRef kako je opisano u dokumentaciji: https://material.angular.io/components/dialog/overview

Kad pokušavam to napraviti, pojavila se pogreška:

GRESKA Pogreška: StaticInjectorError[MatDialogRef]: StaticInjectorError[MatDialogRef]: NullInjectorError: Nema pružatelja za MatDialogRef!

app.module.ts

import { NgModule }      from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { FormsModule }   from '@angular/forms';

import {
	MatInputModule,
	MatDialogModule,
	MatProgressSpinnerModule,
	MatButtonModule,
	MatDialog,
	MatDialogRef
} from '@angular/material';

import { ApiModule } from '../api/api.module';
import { RoutingModule } from '../routing/routing.module';

import { RegistrationComponent } from './components/registration.component';
import { LoginComponent } from './components/login.component';

import { AccountService } from './services/account.service';

@NgModule({
	imports: [
		BrowserModule,
		MatInputModule,
		MatDialogModule,
		MatProgressSpinnerModule,
		MatButtonModule,
		FormsModule,
		RoutingModule,
		ApiModule
	],
	declarations: [
		RegistrationComponent,
		LoginComponent
	],
	entryComponents: [
		LoginComponent,
		RegistrationComponent
	],
	providers: [
		AccountService,
		MatDialog,
		MatDialogRef
	]
})
export class AccountModule {}

home.component.ts

import { Component } from '@angular/core';

import { MatDialog } from '@angular/material';
import { RegistrationComponent } from '../account/components/registration.component';

@Component({
    moduleId: module.id.replace('compiled', 'app'),
    templateUrl: 'home.component.html'
})
export class HomeComponent
{
    constructor(private modalService: MatDialog) {}

    public openModal() : void
    {
        let dialog = this.modalService.open(RegistrationComponent, {});
    }
}

registracija.komponenta.ts

import { Component } from '@angular/core';
import { Router } from '@angular/router';
import { MatDialogRef } from '@angular/material/dialog';

import { User } from '../../../models/domain/User';
import { ApiUserService } from '../../api/entity-services/user.service';
import { AuthService } from '../../auth/auth.service';
import { AccountService } from '../services/account.service'

@Component({
	selector: 'registration-component',
	templateUrl: 'app/modules/account/templates/registration.component.html'
})
export class RegistrationComponent
{
	public user :User = new User();

	public errorMessage :string;

	public isLoading :boolean;

	constructor
	(
		private userService :ApiUserService,
		private authService :AuthService,
		private accountService :AccountService,
		private router :Router,
		public dialogRef :MatDialogRef<RegistrationComponent>
	)
	{
		this.isLoading = false;
	}

	public onSubmit(e) :void
	{
		e.preventDefault();
		this.isLoading = true;

		this.userService
			.Create(this.user)
			.subscribe(
				user =>
				{
					this.user.id = user.id;
					this.user.login = user.login;


					this.authService
						.Login(this.user)
						.subscribe(
							token =>
							{
								this.accountService.Load()
									.subscribe(
										account =>
										{
											this.user = account;
											this.isLoading = false;
											this.dialogRef.close();

											let redirectRoute = account.activeScopeId
												? `/scope/${account.activeScopeId}`
												: '/scope-list/';

											this.router.navigate([redirectRoute]);
										},
										error => this.errorMessage = <any>error
									);
							},
							error => this.errorMessage = <any>error
						);
				},
				error => this.errorMessage = <any>error
			);
	}
}

Odgovor #1

Imao sam ovu pogrešku prilikom dodavanja dijaloga u servis koji će se dijeliti među mnogim komponentama. Samo da pojasnim, pogreška nije bila prisutna u aplikaciji prije nego što su dijalozi premješteni u servis. Rješenje je bilo uključiti prilagođenog providera MatDialogRef u glavni modul

  import { DialogService } from './services/dialog.service';
  import { MatDialogModule, MatDialogRef } from '@angular/material/dialog';
  ...
  imports: [
    ...
    MatDialogModule
  ],
  providers: [
     {
       provide: MatDialogRef,
       useValue: {}
     },
     DialogService
  ],
  ...

S ovim pružateljem usluga, servis je radio kao singleton s mojim dijalozima koje je trebalo dijeliti i pogreška pružatelja usluga je nestala.

Odgovor #2

Zahvaljujući @Edric, riješio sam problem uvozenjem MatDialogModule, MatDialog i MatDialogRef iz @angular/material/dialog umjesto iz @angular/material

Odgovor #3

Na primjer, koristite app-checkout

To se može dogoditi ako koristite komponentu na oba načina, 'dialog' i 'normalan', dodajući app-checkout u normalnu HTML datoteku.

Rješenje 1: uklonite <app-checkout> </app-checkout> ako ga ne trebate uvesti na normalan način u HTML datoteku

Rješenje 2 koje se koristi i u dijalogu i u HTML datoteci. Umjesto ovoga:

// ... something have selector: "app-checkout",
 constructor(
    public dialogRef: MatDialogRef<CheckoutComponent>,
    @Inject(MAT_DIALOG_DATA) public dialogData: any
  ) {}

trebate ga ubrizgati (da biste ga učinili opcionalnim, ubrizgajte):

na ovaj način:

  constructor(
    // only need the @Optional() before the public dialogRef 
    @Optional() public dialogRef: MatDialogRef<CheckoutComponent>, 
    @Inject(MAT_DIALOG_DATA) public dialogData: any
  ) {

  }

ili ovako:

// ... the same above
  private dialogRef = null;
  private dialogData;
  constructor(private injector: Injector) {
      this.dialogRef = this.injector.get(MatDialogRef, null);
      this.dialogData = this.injector.get(MAT_DIALOG_DATA, null);
  }

Odgovor #4

Samo dodajte @Optional() prije vaše deklaracije dialogRef.

Na primjer:

constructor(
    @Optional() public dialogRef: MatDialogRef<yourDialogComponentName>
) {
}