Laravel one click sorting - php

Question

I'm new on this Laravel and was trying to play around the Laravel's quickstart project. I'm not familiar with the variable set within the template. I'm trying to create a one button/link to sort by ascending or decending all the retrieved records.
Usually I have no problem with basic PHP sorting by using switch (), but since I'm using Laravel, things are getting a little bit unfamiliar to me. So here's the code:-
routes.php
Route::group(['middleware' => ['web']], function () {
Route::get('/sort/{id}', function ($id) { // get to the sorted page ("/sort")
switch ($id) {
case 'asc' :
return view('tasks', [ // get the tasks table from the database
'tasks' => Task::orderBy('name', 'asc')->get(),
'sort' => "desc"
// From the tasks table, get the listing from the table and arrange them descending by date of creation
]);
case 'desc' :
return view('tasks', [ // get the tasks table from the database
'tasks' => Task::orderBy('name', 'asc')->get(),
'sort' => "asc" // From the tasks table, get the listing from the table and arrange them ascending by date of creation
]);
}
});
tasks.blade.php
<div class="panel-body">
<table class="table table-striped task-table">
<thead>
<th>Task</th>
<th> </th>
</thead>
<tbody>
#foreach ($tasks as $task) <!-- display the listings from the tasks table -->
<tr>
<td class="table-text"><div>{{ $task->name }}</div></td>
<td class="table-text"><div>{{ $task->description }}</div></td>
<!-- Task Delete Button -->
<td>
<form action="{{ url('task/'.$task->id) }}" method="POST"> <!-- form action select the id on the task table database($task->id) -->
{{ csrf_field() }}
{{ method_field('DELETE') }} <!-- delete the field -->
<button type="submit" class="btn btn-danger">
<i class="fa fa-btn fa-trash"></i>Delete
</button>
</form>
</td>
</tr>
#endforeach
</tbody>
</table>
</div>
I just refer some of the codes on the internet and make some of my own as I'm not used with the variable within the HTML part in Laravel. I thought it would work but when I run the code, it throws the undefined variable: sort in the tasks.blade.php. Usually any variable is within the backend PHP, but this is a whole new environment to me. So, I wonder how does variable in HTML works? and how to make the sort working?
EDIT 1:
Screenshot of error:-

Answer 1

Your sort doesn't work, because you sort Task model ascending in both cases. You should use
Task::orderBy('name', 'desc')->get()
in second case. About variable it would be more clear if you provide screenshot.

Answer 2

I have found a solution for my own question. Instead of using {{$sort}} in the tasks.blade.php which I haven't set any default key, I need to use isset() function to check whether the variable is set accordingly or not. Since Laravel have its own function for that, I just use them:-
{{{ isset($sort) ? $sort : 'asc' }}}
This mean that it will set the default initial $sort variable into ascending (asc).
That's the answer for it. Thank you, me!