ToastService

Topic: ToastService

gvonhagel pro asked 6 years ago

I am trying to use the ToastModule/Service with MDB Angular Pro. I have a core module that I'm trying to build a service that functions as the default ErrorHandler for my Angular application. I have been wracking my brain trying to get this to work. If I do this things the way the documentation suggests, IE. use ToastModule.forRoot() in my app.module, etc. I get "Cannot instantiate cyclic dependency!" when trying to inject the ToastService in my error-handling service by method of constructor(private toast: ToastService) Now, I can get it somewhat working by inject the Injector from @angular/core instead (constructor(private injector: Injector), in which case I don't get the cyclic dependency error, but I instead get a blank alert when using toast service as this.injector.get(ToastService).error/info/etc This is what the console/page looks like with the blank alert, that you can faintly see in the top left where it ought to be: https://gyazo.com/c7447c76ad6d77aa911e016fdd627ef1 Any help is appreciated, thank you

gvonhagel pro commented 6 years ago

Anyone? I know you guys have a lot of questions to get to, but a simple point in the right direction would be great.

gvonhagel pro commented 6 years ago

Anyone..?

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israelfreitas pro answered 4 years ago

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Hi!

Finally, I found the solution! Thanks to michelepatrassi.

My ErrorHandler now looks like this:

import { ErrorHandler, Injectable, Injector, NgZone } from '@angular/core';
import { ToastService } from 'ng-uikit-pro-standard';

@Injectable()
export class MyErrorHandler implements ErrorHandler {

  constructor(private readonly injector: Injector, private readonly ngZone: NgZone) {  }

  private get toast() { return this.injector.get(ToastService) }

  handleError = (error: any): void => {
    this.ngZone.run(() => this.toast.error('Some message here...', 'Error!', {}))
  }
}

From now, the ErrorHandler knows how to handle errors from Observables.

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israelfreitas pro answered 4 years ago

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Hi.

I'd like to know how that problem was fixed.

I have the same scenario (global error handler + Injector's injection to avoid cyclic dependency error) and I imported the ToastModule once using ToastModule.forRoot(), but I get the same error (a blank alert when using toast service as this.injector.get(ToastService)).

I'm using the latest version of MBD Angular.

Thank you.

israelfreitas pro commented 4 years ago

After some tests, I realize that it seems to be an issue with RxJS Observables. Look:

// test.component.ts:

throwErrorString() { // ErrorHandler captures the error and shows the toast just fine.

throw "An error...";
}

throwErrorObject() { // ErrorHandler captures the error and shows the toast just fine.
throw new Error("An error...");
}

throwRxJSThrowError() { // ErrorHandler capture the error but shows the a crashed toast.
throwError("An error...").subscribe();
}

Any help is appreciated.Thank you.

Please insert min. 15 characters.

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Dawid Adach pro answered 6 years ago

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Dear gvonhagel, Please verify that you are using the latest version of MDB PRO, we have fixed that issue in 5.1.2. Please let me know how you installed MDB PRO - via npm or zip package? Make sure that you are importing Toast Module once and you are importing Toast Service in components (instead of Module again).

gvonhagel pro commented 6 years ago

I am using version 5.1.2, double checked to be sure. I installed MDB PRO via NPM. I am only importing the ToastModule once using ToastModule.forRoot() as specified in the documentation, and injecting it in the exception handling module as ToastService.

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ForumUser: Pro
Premium support: No
Technology: MDB Angular
MDB Version: -
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Provided sample code: No
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gvonhagel

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