What is the best approach for presenting multiple entries with identical IDs in a table using Angular?

Question

What is the best approach for presenting multiple entries with identical IDs in a table using Angular?

I obtained a JSON response in the following structure; https://jsonplaceholder.typicode.com/posts

My goal is to format the table to resemble the attached image structure.

However, my current implementation is displaying repeating user IDs. How can I adjust my code to achieve the desired output structure?

  <table datatable [dtOptions]="dtOptions" [dtTrigger]="dtTrigger" class="row-border hover">
      <thead>
      <tr>
      <td>Sl No</td>
      <th>Title</th>
      <th>Body</th>
      </tr>
      </thead>
      <tbody>
      <tr *ngFor="let record of dataString;let i=index">
      <td>{{record.userId}}</td>
      <td>{{record.title}}</td>
      <td>{{record.body}}</td>
      </tr>
      </tbody>
    </table>

angular typescript user-interface angularjs-directive angularjs-scope

Answer 1

Answer №1

To effectively work with your api response, you'll need to parse it and structure a new object according to your requirements. One approach could be utilizing array methods for a 'group by' operation.

For instance, consider an object structure like user -> id: number, articles: article[]

public getUsers(): User[] {
    return this.http.get(URL).map(results => {
        const users: number[] = results
            .filter((item, index, self) => self.indexOf(item.userId) === index)
            .map(item => {
                return {
                    id: item.userId,
                    articles: results.filter(result => result.userId === item.userId)
                        .map(result => {
                            return {
                                id: result.id,
                                title: result.title,
                                body: result.body
                            } as Article
                        })
                } as User
            });
    })
}

Answer 2

To effectively work with your api response, you'll need to parse it and structure a new object according to your requirements. One approach could be utilizing array methods for a 'group by' operation.

For instance, consider an object structure like user -> id: number, articles: article[]

public getUsers(): User[] {
    return this.http.get(URL).map(results => {
        const users: number[] = results
            .filter((item, index, self) => self.indexOf(item.userId) === index)
            .map(item => {
                return {
                    id: item.userId,
                    articles: results.filter(result => result.userId === item.userId)
                        .map(result => {
                            return {
                                id: result.id,
                                title: result.title,
                                body: result.body
                            } as Article
                        })
                } as User
            });
    })
}

What is the best approach for presenting multiple entries with identical IDs in a table using Angular?

Answer №1

Similar questions

The ng-select dropdown is experiencing issues on the user interface following an update to the newest versions of Angular 6

Can you explain the meaning of <T = {}>?

Using *ngIf to construct SVG icons in Angular 2 doesn't contribute to the DOM in any way

Learn how to render a single element with multiple child elements within separate `<td>` tags in a table row using React

What is the best way to customize the styles of Material UI V5 Date Pickers?

Learning how to effectively incorporate two matSuffix mat-icons into an input field

Retrieving subcollection data in Firestore using Angular

Angular 2 or more variable binding

Tips for successfully transferring the nested service and retrieving the response from an Angular factory to a controller

Ways to eliminate unnecessary items from a JavaScript object array and generate a fresh array

Tips for simulating mouse events in Jasmine tests for Angular 2 or 4

The Angular Material Table is not showing any data on the screen

There was an issue retrieving the metadata for the bootstrap package using the git+ssh protocol

Troubleshooting nested form controls in Angular v12

Create a TypeScript view component that encapsulates an HTMLElement for seamless integration with TweenMax

Ways to mimic an Angular subscription during a Jasmine test

The formControl value is not being shown on the display

Error: Failed to retrieve the name property of an undefined value within the Array.forEach method

Challenges with Angular 4 service initialization

Angular2 - Leveraging data to dynamically control radio buttons