The template displays an <object Object>, yet the observable async pipe functions without any errors

I am working with an observable of todos that have properties such as id, title, and completeness.

TodosComponent/index.ts

import {Component, OnInit, ChangeDetectionStrategy, ChangeDetectorRef} from '@angular/core';
import {Todo, ITodo} from '../../../todo/todo';
import {TodoDataService} from '../../Services/API/todo-data.service';
import {APIService} from '../../Services/API/APIServices';
import {AuthService} from '../../Services/AuthService/auth.service';
import {Router} from '@angular/router';
import {Observable} from 'rxjs';
import {select, Store} from '@ngrx/store';
import {TodoState} from '../../store/Reducer/todo.reducers';
import {getTodos} from '../../store/selector/todo.selector';
import {getTodoRequest} from '../../store/Actions/todo.action';

@Component({
  selector: 'app-todos',
  templateUrl: './index.html',
  styleUrls: ['./index.css'],
  providers: [TodoDataService, APIService],
  changeDetection: ChangeDetectionStrategy.OnPush,
})
export class TodosComponent implements OnInit {

 constructor(private todoDataService: TodoDataService,
             private auth: AuthService,
             private route: Router,
             private ref: ChangeDetectorRef,
             private store: Store<TodoState>
  ) {}
  todo$ = this.store.pipe(select(getTodos));
  public ngOnInit() {
   // this.store.dispatch(getTodoRequest());
  }
  onAddToDo(todo) {
    // this.todoDataService.addTodo(todo).subscribe((newTodo) => {
    //   this.todos = this.todos.concat(newTodo);
    //   // this.fetchTodo();
    // });
  }

... ... ...continue rewriting the rest of the text in a unique way

Answer №1

Avoid examining the generated HTML as it may not provide useful insights into the issue at hand.

*ngIf="todo$ | async as todos" is the recommended approach for retrieving data within a template.

If the expected todos are not visible, troubleshooting your store to confirm its status and action reduction accuracy is essential.

Utilizing store-devtools is an effective method to navigate the store and identify solutions.

To begin, ensure that actions properly add todos to the store before evaluating selector functionality. Utilize commented code snippets like

getTodos = createSelector(getTodoState, selectAll )
for ngrx/entity implementation.

If the store contains data but selectors do not extract it, integrate tap(console.log) at various points to inspect selector results, for instance:

todo$ = this.store.pipe(select(getTodos), tap(console.log));

This allows you to view the returned data in the console log.

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