Error message: Creating default object from empty value - php

Question

Facing this error message but not sure what is wrong with it? Tried the solutions at StackOverflow and other forums but didn't work either.
The error is at line $review->title=$request->title;
public function updateReview(Request $request)
{
// dd($request->all());
$review = Review::find($request->id);
$review->id=$request->id;
$review->title=$request->title;
$review->review=$request->review;
$review->rating=$request->rating;
$review->save();
return redirect('/');
}
A dd($request->all()); returns the following:
array:5 [▼
"id" => "3"
"title" => "User 3 has updated title"
"review" => "User 4 just updated review"
"rating" => "5"
"_token" => "pGFVAzHNg7HmXbkMXylxcM6biqaGnwFmsxjsrTgl"
]
And these are my routes:
Route::get('/edit_review/{id}', 'App\Http\Controllers\UserController#editReview');
Route::post('/update', 'App\Http\Controllers\UserController#updateReview')->middleware('user');

Answer 1

You're getting this error Warning: Creating default object from empty value because $review->title returns false.
find() takes an id and returns a single model. If no matching model exist, it returns null.
You can use findOrFail() instead of find(), if the record not matched then findOrFail() will throw a 404 error :
$review = Review::findOrFail($request->id);
I think you've missed to define a parameter on your function, that passes with your route, probaby its {id} :
public function updateReview(Request $request, $id)
{
$review = Review::findOrFail($id);
//...
}