Where is the error for update data in Laravel? - php

Question

Why is there an error when updating or editing data in Laravel using a data array, like this error.
foreach() argument must be of type array|object, string given
Database in MySQL:
Screenshot my Database in MySQL
Code:
Controller:
public function UpdateGradeStudent(Request $request){
$data = GradeDetail::find($request->id_grade_detail);
foreach($request->get('id_grade') as $index => $value) {
GradeDetail::updated([
$data->quiz =>$request->quiz[$index],
$data->assignment => $request->assignment[$index],
$data->d_t => $request->d_t[$index],
$data->min_text => $request->min_text[$index],
$data->final_text => $request->final_text[$index],
$data->total => $request->final_text[$index],
]);
}
return redirect('teacher/data-grade');
}
Blade:
form method="POST" action="{{route('edit.teacher.grade')}}" enctype="multipart/form-data">
#csrf
<input type="hidden" name="id_grade" value="{{ $userGrades->id_grade }}">
<div class="flex">
<input type="submit" class="focus:outline-none text-white bg-[#464867] hover:bg-[#464867] font-medium rounded-lg text-sm px-5 py-2.5 mb-2 mt-3 mr-4" type="button" value="Save">
<a href="{{url('teacher/data-grade')}}" class="focus:outline-none text-white bg-[#464867] hover:bg-[#464867] font-medium rounded-lg text-sm px-5 py-2.5 mb-2 mt-3" type="button" >Cancel</a>
</div>
<table class="w-full text-sm text-left text-gray-500 dark:text-gray-400">
<tbody>
#forelse($subject as $data)
<tr class="bg-white border-b dark:bg-gray-900 dark:border-gray-700">
<th scope="row" class="py-4 px-6 font-medium text-gray-900 whitespace-nowrap dark:text-white">
<input
type="number"
min="0"
max="100"
name="quiz[]"
id="quiz"
value="{{$data->quiz}}"
autocomplete="quiz"
class="bg-gray-50 border border-gray-300 text-gray-900 text-sm rounded-lg focus:ring-blue-500 focus:border-blue-500 block w-full p-2.5 dark:bg-gray-600 dark:border-gray-500 dark:placeholder-gray-400 dark:text-white"
required
>
</th>
<th scope="row" class="py-4 px-6 font-medium text-gray-900 whitespace-nowrap dark:text-white">
<input
type="number"
min="0"
max="100"
name="assignment[]"
id="assignment"
value="{{$data->assignment}}"
autocomplete="min_score"
class="bg-gray-50 border border-gray-300 text-gray-900 text-sm rounded-lg focus:ring-blue-500 focus:border-blue-500 block w-full p-2.5 dark:bg-gray-600 dark:border-gray-500 dark:placeholder-gray-400 dark:text-white"
required
>
</th>
And how or which part of the error to be able to update data using an array?

Answer 1

$request->get('id_grade') will return the value of id_grade which will be a string as mentioned by #zohrehda. Please update your foreach loop to be
foreach($request->all() as $index => $value) {
$request->all() returns an array of all your inputs which can be iterated upon.
Additionally, your update method has a typo. It should be GradeDetail::update and not GradeDetail::updated.

Answer 2

You have to change id_grade hidden input like this:
<input type="hidden" name="id_grade[]" value="{{ $userGrades->id_grade }}">