Laravel API Resource not returning data with one to many relationship - laravel

Question

In my DoctorController, I have show method like below -
public function show(Doctor $doctor){
DoctorResource::withoutWrapping();
return new DoctorResource($doctor->load('expertises'));
}
In my DoctorResource, if I do
public function toArray($request){
return parent::toArray($request);
}
It returns -
{
"id": 1,
"name": "John Doe",
"mobile": "1234567890",
"email": null,
"avatar": null,
"bio": "Lorem Ipsum 2",
"email_verified_at": null,
"mobile_verified_at": null,
"is_account_verified": 0,
"account_status": "Active",
"created_at": "2020-12-03T07:45:07.000000Z",
"updated_at": "2020-12-03T10:49:30.000000Z",
"expertises": [
{
"id": 1,
"expertise": "ABC",
"created_at": null,
"updated_at": null,
"pivot": {
"doctor_id": 1,
"expertise_id": 1,
"created_at": "2020-12-03T10:49:29.000000Z",
"updated_at": "2020-12-03T10:49:29.000000Z"
}
},
{
"id": 2,
"expertise": "XYZ",
"created_at": null,
"updated_at": null,
"pivot": {
"doctor_id": 1,
"expertise_id": 2,
"created_at": "2020-12-03T10:49:29.000000Z",
"updated_at": "2020-12-03T10:49:29.000000Z"
}
}
]
}
But I want to return certain fields from my DoctorResource, So I did this but it is giving me an error. Exception: Property [expertise] does not exist on this collection instance.
public function toArray($request){
return [
'id' => $this->id,
'name' => $this->name,
'mobile' => $this->mobile,
'email' => $this->email,
'avatar' => $this->avatar,
'bio' => $this->bio,
'expertises' => [
'name' => $this->expertises->expertise
]
];
}

Answer 1

you have define another Json Resource to do that:
first you can retrive the model and add keys and values based on each model properties like :
public function toArray($request){
return [
'id' => $this->id,
'name' => $this->name,
'mobile' => $this->mobile,
'email' => $this->email,
'avatar' => $this->avatar,
'bio' => $this->bio,
'expertises' => ExpertiesResource::collection($this->experties);
];
}
and you have to define Resource Collection as Follow:
class ExpertiesResource extends JsonResource
{
/**
* Transform the resource into an array.
*
* #param \Illuminate\Http\Request $request
* #return array
*/
public function toArray($request)
{
return [
"id" => $this->id,
"exp" => $this->exp,
.....
];
}
}
when your JsonResource has an Array of Object(Resource), you have to Define That Resource and make use of it like use App\Http\Resources\ExpertiesResource