Preserving leading zeros in Blade view

I am writing a Laravel 7 application using Blade views. One of my MySQL tables contains the clients tools which have an id that follows no specific pattern (restructuring these ids is out of discussion since they come from another system the client will not change). Some of these ids have a leading zero which is supposed to be shown in all the views, like e.g. 055A.

The ids are stored with leading zeros in the database (varchar(64)), no issue there. But when a blade view shows the ids, the leading zero is gone and moreover, the link to edit and delete is like myapp/public/tool/5A5/edit which leads to an error ofc.

My approach was to show the ids with <td>{{ sprintf('%04d', $tool->id) }}</td> but not all ids have 4 chars and still the links are like myapp/public/tool/5A5/edit, because Blade takes the whole $tool object. Here’s the section from my view:

@foreach($tools as $tool)
<tr>
   <td>{{ sprintf('%04d', $tool->id) }}</td> //not enough!
   <td>{{ $tool->title }}</td>
   <td style="text-align: center;">{{ $tool->tooltype->name }}</td>
   @can('manage-tools', AppUser::class)
   <td class="td-actions text-right">
      <form action="{{ route('tool.destroy', $tool) }}" method="post">
         @csrf  
         <a rel="tooltip" class="btn btn-success btn-link" href="{{ route('tool.edit', $tool) }}" data-original-title="" title="">
            <i class="material-icons">edit</i>
            <div class="ripple-container"></div>
         </a>
         @method('delete')
         <button type="button"  value="disabled" disabled class="btn btn-danger btn-link" data-original-title="" title="delete" 
         onclick="confirm('{{ __("Wirklich löschen?") }}') ? this.parentElement.submit() : ''">
         <i class="material-icons">close</i>
         <div class="ripple-container"></div>
         </button>
      </form>
   </td>
   @endcan
</tr>
@endforeach

From my ToolController:

public function index(Tool $model)
{
  $this->authorize('manage-tools', User::class);
  return view('tools.index',['tools' => $model->get()]); 
}

Answer

Laravel will do some “magic” behind the scenes to handle id fields gracefully, for example stripping leading zeros. Since in most cases model ids are incrementing, it is comes with this behavior as a default. You can disable this behavior using the following setting on the Model you do not have an incrementing id field. In your case:

class Tool extends Model
{
    public $incrementing = false;
    ....

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Answer