<p>這是我的函數。 我在其中遇到了錯誤，請幫我解決這個錯誤，並告訴我為什麼會發生這個錯誤。 </p> <pre class="brush:php;toolbar:false;">public function update(Request $request) { $id = $request->id; $grade = Grade::find($id); $grade = $request->validate([ 'title' => 'required|string', 'slig' => 'string', 'description' => 'string', ]); $grade = Grade::update($grade); return [ 'staus' => 'success', 'grade' => $grade, ]; }</pre>

$newGrade = (new Grade())->update($grade);

return [
    'status' => 'success',
    'grade'  => $newGrade,
];

$grade = Grade::findOrFail($request->id);

$validatedData = $request->validate([
    'title' => 'required|string',
    'slig' => 'string',
    'description' => 'string',
]);

$grade->update($validatedData);

return [
    'status' => 'success',
    'grade' => $grade,
];