Method update does not exist in Laravel - laravel-5

Question

It is very simple code to update an existing entry. save() is working perfectly. But update is not working. Here is my code:
Route::post('toggleFavourite',function(){
try{
$data = Request::all();
extract($data);
$favourite = \ItScholarBd\Api\Models\Favourite::where(['user_id'=> $user_id,'shop_id'=> $shop_id])->get();
if(empty($favourite)){
$favourite = new \ItScholarBd\Api\Models\Favourite;
$favourite->user_id = $user_id;
$favourite->shop_id = $shop_id;
$favourite->status = $status;
$favourite->save();
}else{
$favourite->status = $status;
$favourite->update();
}
return response()->json(['status' =>1, 'data' => $favourite], 200);
}
catch (Exception $ex) {
return response()->json(['status'=>0, 'status_text' => $ex->getMessage()], 500);
}
});
I am getting the following response:
{"status":0,"status_text":"Method update does not exist."}

Answer 1

the docs say the following for an update
$flight = App\Models\Flight::find(1);
$flight->name = 'New Flight Name';
$flight->save();

Answer 2

I believe the only thing you have to change to make your code work is replace $favourite->update(); with $favourite->save();, but I tried to make your code a little bit simpler:
use Illuminate\Http\Request;
use ItScholarBd\Api\Models\Favourite;
Route::post('toggleFavourite', function (Request $request) {
try {
$user_id = $request->get('user_id');
$shop_id = $request->get('shop_id');
$status = $request->get('status');
// get the existing favourite or a new instance
$favourite = Favourite::where(['user_id' => $user_id, 'shop_id' => $shop_id])->firstOrNew();
// check if it exists in the database
if (!$favourite->exists()) {
$favourite->user_id = $user_id;
$favourite->shop_id = $shop_id;
}
$favourite->status = $status;
$favourite->save();
return response()->json(['status' => 1, 'data' => $favourite], 200);
} catch (Exception $ex) {
return response()->json(['status' => 0, 'status_text' => $ex->getMessage()], 500);
}
});
PS:
You should add validation to your route, so you don't just accept and store any values that are being sent with the request in the database.

Answer 3

From my observation, I come to a conclusion:
update is only work on an OBJECT of find($id) method. The following code works perfectly:
try {
$data = Request::all();
extract($data);
$favourite = Favourite::where(['user_id' => $user_id, 'shop_id' => $shop_id]);
if (!$favourite->count()) {
$favourite = new Favourite;
$favourite->user_id = $user_id;
$favourite->shop_id = $shop_id;
$favourite->status = $status;
$favourite->save();
}else{
$favourite = $favourite->get()->toArray();
$favourite = Favourite::find($favourite[0]['id']);
$favourite->status = $status;
$favourite->update();
}
return response()->json(['status' => 1, 'data' => $favourite], 200);
} catch (Exception $ex) {
return response()->json(['status' => 0, 'status_text' => $ex->getMessage()], 500);
}