Eloquent Model with nested model issue - eloquent

Question

I have got a couple of tables looking like this:
1) article
id
name
2) article_options
id
article_id
option_id
3) option
id
name
An article can have none, one or many options and I want to return in the RestAPI a JSON structure that looks like this:
[{
"id": 1,
"name": "Article1",
"options": [10]
},
{
"id": 2,
"name": "Article2",
"options": [3, 10]
},
{
"id": 3,
"name": "Article3",
"options": []
}]
whereby 3 and 10 would be the option ids.
I tried a few solutions but none worked. Here is what I currently have:
Article Model:
class Article extends Model
{
# protected $with = ['Article_Option'];
public function options()
{
return $this->hasMany('App\Article_Option');
}
}
Article Controller:
class ArticleController extends Controller
{
public function index()
{
$articles = Article::all();
return response()->json(
$articles
, 200);
}
}
I just can't get my head around how the model and the controller should be configured to achieve this.
Please help.
Thanks
Goppi
[UPDATE]
Thanks to Hides help. With some modification I got it to work the way I wanted. Here is all the code...
Article model:
namespace App;
use Illuminate\Database\Eloquent\Model;
class Article extends Model
{
public function options()
{
return $this->belongsToMany('App\Option');
}
}
ArticleController:
namespace App\Http\Controllers;
use App\Article;
use App\Http\Resources\Article as ArticleResource;
use Illuminate\Http\Request;
class ArticleController extends Controller
{
public function index()
{
$articles = ArticleResource::collection(Article::all());
return response()->json ($articles, 200);
}
}
and the Resource:
namespace App\Http\Resources;
use Illuminate\Http\Resources\Json\JsonResource;
class Article extends JsonResource
{
public function toArray($request)
{
return [
'id' => $this->id,
'name' => $this->name,
'options' => $this->options->pluck('id')->all()
];
}
}

Answer 1

article_options is your pivot table and the relationship between article and options is a many to many relationship which laravel provides a function for here. So all you will have to do is add the relationship to your article model.
public function options() {
return $this->belongsToMany(Option::class);
}
then when getting the articles you can call that relationship.
$articles = Article::with('options')->get();
This will grab all articles with all option relations and format it in the way that you desired. Laravel can automatically work out which fields it needs to use to form the relationship between the tables so don't worry about that though it does have an option to supply them in the belongsToMany function.
If you are only wanting the id you can pass specific columns to the with function as below.
$articles = Articles::with('options:id')->get()
To then return in a json format you can use resources. Resources help better format the collection of the model which can be used to achieve what you want. You will need to create a resource for articles. In the article resource you can format it how you wanted and to format the options you can use collection methods to transform it into an array of ids by plucking the field from the collection.
Article Resource
public function toArray($request)
{
return [
'id' => $this->id,
'name' => $this->name,
'options' => $this->options->pluck('id')->all(),
];
}
So once you have got the articles you can return them like so
return new ArticlesResource::collection($articles);
If later on you can wanting to pass additional columns through for options you can create an options resource and pass that to the options key in you article resource.
'options' => new OptionsResource::collection($this->options)