Get onlyTrashed() does not exist in query builder - laravel

Question

I am trying to get trashed rows from table messages:
public function trash() {
return $this->onlyTrashed()
->where('user_id', '=', $this->_u)
->orWhere('receiver', '=', $this->_u)
->orderBy('deleted_at', 'desc')->get();
}
I get this error:
Method Illuminate\Database\Query\Builder::onlyTrashed does not exist.
I checked up Builder and SoftDeletes files for onlyTrashed method and it does not exist, how can I look up to trashed messages from message table?
The only way I think about is to create method that doesn't return messages where delete_at is not null and for trashed to return only those where it is not null. But I am still wondering why this doesn't work since it is in documentation at this url:
https://laravel.com/docs/5.6/eloquent#soft-deleting
MORE INFO
Yes it is inside model and yes I added use SoftDeletes:
use Illuminate\Database\Eloquent\SoftDeletes; - on top
use SoftDeletes; after opening the class
Let me paste entire model here:
<?php
namespace App;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\SoftDeletes;
use Illuminate\Support\Facades\DB;
class Messages extends Model
{
use SoftDeletes;
protected $fillable = [
'user_id', 'subject', 'text', 'receiver'
];
public $_u;
protected $dates = ['deleted_at'];
public function __construct() {
$this->_u = auth()->user()->user_id; //or some id as string
}
public function trash() {
return $this->onlyTrashed()
->where('user_id', '=', $this->_u)
->orWhere('receiver', '=', $this->_u)
->orderBy('deleted_at', 'desc')->get();
}
public static function trashed() {
return self::onlyTrashed();
}
}
And controller has:
public function __construct() {
$this->middleware('auth');
}
public function index($field = 'trash') {
if ($field !== "new") {
$messages = (new Msg)->$field();
$user = auth()->user();
return view('pages.messages', compact('messages', 'user'));
}
return view('pages.messages.new', compact('messages', 'user'));
}
I tried calling static as well and I tried doing it from tinker and still keep getting:
onlyTrashed() doesn not exist

Answer 1

You have to call the parent constructor:
public function __construct() {
parent::__construct();
$this->_u = auth()->user()->user_id;
}

Answer 2

I think what you want is to define the trash method static:
public static function trash() {
return self::onlyTrashed()
->where('user_id', '=', $this->_u)
->orWhere('receiver', '=', $this->_u)
->orderBy('deleted_at', 'desc')->get();
}
Then call this function by:
$messages = Messages::trash();

Answer 3

This should work
# YourModelController.php
/**
* Show only trashed
*
* #return \Illuminate\Http\Response
*/
public function trashed()
{
...
$trashed = YourModel::onlyTrashed()->get();
...
}

Answer 4

I have researched a little further and I got this:
From https://laravel.com/api/5.6/Illuminate/Database/Eloquent.html
I should have
SoftDeletesTrait
but I have
SoftDeletes
. In softdeletestrait we have onlyTrashed method but in SoftDeletes we do not.
So I copied that method from this page:
https://github.com/laravel/framework/blob/7d9e7068c49f945385673014d4cba4de28accd5e/src/Illuminate/Database/Eloquent/SoftDeletingTrait.php#L119
And added it to SoftDeletes class, now it works like it should. I haven't find why it doesn't exist inside SoftDeletes class so if anyone find out let us know!