laravel - Lumen: update records via json body -

i have laravel lumen api. i'm seeing issue update functionality.

in controller, code updating item is:

public function update(request $request, $id)     {          $this->validate($request, [             'name' => 'required',             'description' => 'required',             'completed' => 'required',          ]);          $todo = todo::find($id);         $todo->name = $request->name;         $todo->description = $request->description;         $todo->completed = $request->completed;         $todo->save();         return response()->json(['status' => 'success']);     } 

i can update todo item using:

http://lumen-todo.app/api/51?name=test&description=test&completed=1  

however hoping send parameters in json body, this

put http://lumen-todo.app/api {   "id": 1   "name": "test",   "description": "test",   "completed": 1, } 

for adding items, works via json body, don't understand why not work updates. info, 'add item' controller code here:

public function store(request $request) {      $this->validate($request, [         'name' => 'required',         'description' => 'required',         'completed' => 'required'      ]);      $todo = new todo();     $todo->name = $request->name;     $todo->description = $request->description;     $todo->completed = $request->completed;     $todo->save();     return response()->json(['status' => 'success']);  } 

instead of doing this:

$todo = new todo(); $todo->name = $request->name; $todo->description = $request->description; $todo->completed = $request->completed; $todo->save(); 

do, this:

use app\todo;  protected $model;  public function __construct(todo $model) {     $this->model = $model; }  $resource = $this->model->find($id); $resource->fill($request); $resource->save(); 

also, can json_decode() function change json params array , use validate , save data.