CODEWITHSUNDEEP
angulartypescript
avoliva
avoliva

Reputation: 3366

Master detail view in angular2?

Edit: Figured it out. I moved all the html in the body of index.html to app.component.ts and everything worked fine. Below answer is correct method.

My issue is that I have a ParentComponent which reads from a service, and posts the data to a sidebar. When you click an item in the sidebar it's supposed to post details about that parent in the main section of the page. Since it requires two different templates, I figured the solution is to use a parent-child relationship where the parent is the sidebar and the child is the detail part and I pass the data to the child to display. Does that sound right? Is there a better way to solve this? I've tried various methods but they all seem outdated as it uses directives which aren't in use any more.

Edit: the other question is not the same because the answer references directives which were removed in rc6 release of angular2. This question is post-rc6.

Edit 2: Added some code

index.html:

<header>
  <div class="content">This is a header</div>
</header>
<div class="container">
    <div class="sidebar">
      <div class="content">
        <parent-items></parent-items>
      </div>
    </div>
    <div class="main-content">
      <div class="content">
        <my-app>Loading...</my-app>
        <child-cmp [id]="selectedItem.id"></child-cmp>
      </div>
    </div>
    <div class="clearfix"></div>
</div>

child-cmp.ts:

@Component({
  selector: 'child-cmp',
})
export class ChildComponent {
  @Input() set id(n) {
    this.getData(n)
  }
  getData(id: number): void {
     console.log('triggered');
  };
}

parent.ts:

@Component({
  moduleId: module.id,
  selector: 'parent-items',
  templateUrl: `<ul class="items">
      <li *ngFor="let item of items"
          (click)="selectedItem = item"
          [class.selected]="item === selectedItem">{{item.name}}</li>
      </ul>`,
})
export class ItemsComponent implements OnInit {
  items: Item[];
  selectedItem: Item;
  constructor(private itemService: ItemService) {};
  getItems(): void {
    this.itemService
        .getItems()
        .then(items => this.items = items);
  }
  ngOnInit(): void {
    this.getItems();
  }
}

Upvotes: 1

Views: 1268

Answers (1)

BeetleJuice
BeetleJuice

Reputation: 40916

Sounds reasonable. Suppose the parent component has a children array of identifiers

parent template (sidebar)

<div *ngFor="let child of children">
    <a (click)="currentChild = child">{{child.name}}</a>
</div>

When a link is clicked, it will set the current child. The main section would display the current child.

parent template (main)

<child-cmp [id]="currentChild.id"></child-cmp>

Use @Input in child to accept a new child identifier. When an identifier is set, you can populate the child with new data.

child component

/** Get details from server and populate local variables */
getData(id){
    this.http.get('/api/children/'+id).map(data => data.json()).subscribe(
        data => { this.name = data.name; }
    );
}

/** Executed whenever a new id is set */
@Input() set id(n){ this.getData(n) }

Upvotes: 2

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