CODEWITHSUNDEEP
laravelrestapilaravel-5laravel-5.6
Yung Silva
Yung Silva

Reputation: 1510

Responses JSON with Relationship - Laravel/Eloquent

I'm working on a Laravel project and I want to create a REST API for a website. On my system, I have two tables:

Blogs and Categories. The table blogs have the category_id column, which is a key that references the column ID in the category table.

Blogs Migration

class CreateBlogsTable extends Migration
{
    public function up()
    {
     Schema::create('blogs', function (Blueprint $table) {
     $table->increments('id');
     $table->string('title');
     $table->longtext('body');
     $table->string('category_id');
     $table->timestamps();
    });
   }
   .....
}

Categories Migration

class CreateCategoriesTable extends Migration
{
    public function up()
    {
     Schema::create('categories', function (Blueprint $table) {
     $table->increments('id');
     $table->string('name');
     $table->timestamps();
    });
   }
   ....
}

My blogs Model

class Blog extends Model
{
    protected $fillable = ['title', 'body', 'category_id'];
    public function category() {
       return $this->hasMany('app\Category');
    }
}

My blogs Model

class Category extends Model
{
    protected $fillable = ['name'];
    public function blog() {
       return $this->hasMany('app\Blog');
    }
}

So, I created a BlogController and configured the routes to access the corresponding API function.

The api / blogs / via GET is for the index function of my controller, and the function looks like this:

public function index()
{
    $blog = Blog::all();
    return response()->json($blog, 200);
}

With this, I can get the data from the blogs table

[
    {
        "id": 1,
        "title": "title from my blog",
        "text": "text body here",
        "category_id": "2",
        "created_at": "2018-09-05 21:08:21",
        "updated_at": "2018-09-05 21:08:21"
    }
]

but I would like to merge the table of blogs and categories, and get a similar response to this

[
    {
        "id": 1,
        "title": "title from my blog",
        "text": "text body here",
        "category_id": "2",
        "created_at": "2018-09-05 21:08:21",
        "updated_at": "2018-09-05 21:08:21"
        "category": [{
           "id": 2,
           "name": "Development"
        }]
    }
]

someone to help?

Upvotes: 0

Views: 2512

Answers (3)

Jayashree
Jayashree

Reputation: 163

You are using hasMany relation without a reference id for blog in categories table, so the datas were not eager loaded. If you change the migration as

 class CreateCategoriesTable extends Migration
  {
     public function up()
     {
       Schema::create('categories', function (Blueprint $table) {
         $table->increments('id');
         $table->string('name');
         $table->timestamps();
         $table->integer('category_id');
      });
    }
   ....
  }

and then you can use 

Blog::with('category')->get();

Or change the relationship as 

public function category(){
 return $this->belongsTo(Category::class);
}

and use

Blog::with('category')->get();

Upvotes: 2

Yung Silva
Yung Silva

Reputation: 1510

I got the solution, I just needed to say that the blog belongs to a category, and a category can have several blogs

class Blog extends Model
{
    protected $fillable = ['title', 'body', 'category_id',];
    public function category()
    {
        return $this->belongsTo('App\Category');
    }
}

Category Model

class Category extends Model
{
    protected $fillable = ['name'];
    public function blogs() {
        return $this->hasMany('App\Blog');
    }
}

So to list blogs with category details

public function index()
{
    $blogs = Blog::with('category')->get();
    return response()->json($blogs, 200);
}

So to list the categories with your blogs

public function index()
{
    $categories = Category::with('blogs')->get();
    return response()->json($categories, 200);
}

Upvotes: 0

Devon Bessemer
Devon Bessemer

Reputation: 35377

Load the relationship and it will be included in the serialized response.

$blog = Blog::with('category')->get();

This example is eager loading the category relation.

I suggest you read through the eloquent relationships docs: https://laravel.com/docs/5.6/eloquent-relationships

Upvotes: 0

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