Model binding in nested resources in Laravel - php

Question

I am building a RESTful api in Laravel, with my front end app in Angular.
I have a number of models / controllers and routes. I am struggling to get to grips with creating restful route for nested resources.
For example, my route to show a list of clients is simple:
Route::resource('clients', 'ClientsController');
A client can have many campaigns:
class Client extends Model
{
public function campaigns()
{
return $this->hasMany('App\Campaign');
}
}
I do not need a route to show all campaigns, but I do need a route to show all campaigns based on a client.
Route::resource('clients.campaigns', 'CampaignsController');
My intention was for the endpoint requested by the Angular app to be:
myapp/api/clients/6/campaigns
Where '6' is the client ID. This would return a list of campaigns that belong to client with id 6.
In my index method, I am trying to use implicit model binding to get this client Id, but I always get an empty result set:
class CampaignsController extends ApiController
{
public function index(Client $client)
{
$campaigns = Campaign::where('client_id', $client->id)->get();
if (!count($campaigns)) {
Log::warning('Campaigns list is empty');
return $this->respondNotFound('No Campaigns Found');
}
try {
return $this->respond([
'data' => $this->campaignTransformer->transformCollection($campaigns->all())
]);
} catch (\Exception $e) {
Logging::logException($e, 'API error showing campaigns list');
return $this->respondInternalError('An internal error occurred');
}
}
}
Clearly my route isn't binding a client - a var_dump on $client shows this.
Where am I going wrong?

Answer 1

For anyone who comes across this issue - Laravel was injecting the client_id for me.
Therefore index method becomes:
public function index($client_id)
{
$campaigns = Campaign::where('client_id', $client_id)->get();
}