How to Mass Update(Edit) in Laravel Query Builder?

Question

Hello guys I am trying to do a mass update for my application using a checkbox but when I try to update it will just update the 1st student id(I tried to select other students the update does not work). Could you give some insights or concrete examples I can follow?

This is what I have tried so far

public function changeSched()
{
  
    DB::table('class_list')
        ->whereIn('id',  $this->selectedStudents)
        ->update(['section' => $this->selectedSched]);


}

For my checkbox

@foreach($classlist as $stud)
                <tr>
                  <th class="bg-white py-5 px-5">
                    <div class="items-center">
                      
                      <input type="checkbox" wire:model="selectedStudents.{{ $stud->id }}"/>
                    </div>
                    </th>

Answer 1

I do not see any error in your update statement so it should update all the records provided by the query (mass updates are documented here).

I guess the error is before, when you set $this->selectedStudents. Are you sure that this variable contains a simple array (not an associative array) with all the selected IDs?

You should do the following:

• Debug the $this->selectedStudents variable to ensure its content is correct
• Temporarily replace it by a hardcoded value [1, 2, 3] to ensure that the rest of your code is appropriately working

UPDATE

To convert $this->selectedStudents in the right format, you can do the following:

$selectedIds = [];
foreach ($this->selectedStudents as $id => $isSelected){
    if ($isSelected) {
        $selectedIds[] = $id;
    }
}
DB::table('class_list')
        ->whereIn('id',  $selectedIds)
        ->update(['section' => $this->selectedSched]);