angular: convert ngOnInit to signals

[mshima]

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[Copilot]

Pull request overview

This PR modernizes the Angular entity list component by converting from traditional lifecycle hooks (ngOnInit) to signal-based reactive patterns. The changes align with Angular's modern reactive programming model, using signals and effects instead of manual subscription management.

Changes:

• Replaced ngOnInit lifecycle hook with signal-based effect() functions in the constructor
• Converted route parameter and filter observables to signals using toSignal()
• Removed manual subscription management (no more ngOnDestroy needed)

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
generators/angular/templates/src/main/webapp/app/entities/_entityFolder_/list/_entityFile_.ts.ejs	Converted component from ngOnInit pattern to signal-based effects; added toSignal for route state and filter changes; removed OnInit interface and manual subscription
generators/angular/templates/src/main/webapp/app/entities/_entityFolder_/list/_entityFile_.spec.ts.ejs	Updated test to use component's isLoading property; added test for request cancellation behavior

Comments suppressed due to low confidence (2)

generators/angular/templates/src/main/webapp/app/entities/entityFolder/list/entityFile.ts.ejs:173

• The toSignal call for filterChanges should include an initialValue option or use requireSync: true to ensure it always has a value. Without this, the effect at line 209 could receive undefined on its first run if the filterChanges observable doesn't emit immediately. Alternatively, add a null check before using the value: const filterOptions = this.filterChanges(); if (filterOptions) { ... }

    protected readonly filterChanges = toSignal(this.filters.filterChanges);

generators/angular/templates/src/main/webapp/app/entities/entityFolder/list/entityFile.ts.ejs:38

• The Subscription, Observable, and finalize imports are no longer used after converting from ngOnInit to signal-based effects. These imports should be removed from the rxjs import statement to keep the code clean and avoid unused imports.

import { combineLatest<%_ if (!readOnly) { _%>, filter<%_ } _%>, finalize, Observable, Subscription, map, tap } from 'rxjs';

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[OmarHawk]

Sonar complains about the commented code:

Suggested change

	// if (this.<%= entityInstancePlural %>().length === 0) {
	<%_ } _%>
	this.load();
	<%_ if (paginationNo && searchEngineNo && !jpaMetamodelFiltering) { _%>
	// }
	<%_ } _%>
	this.load();
	<%_ if (paginationNo && searchEngineNo && !jpaMetamodelFiltering) { _%>

[mshima]

I don’t know why the microfrontends failures, I may revisit this PR in the future.
I will keep open for reference.