added tracks and perfomers tables, fixed queries

app/Models/Loaders/PlaylistLoader.php

@@ -9,12 +9,12 @@ class PlaylistLoader
     public function getPlaylist(): array
     {
         $data = Track::select(
-            "Track.Name as Track",
-            "Performer.Name as Performer"
-        )->join('Performer', function ($join) {
-                $join->on('Performer.Id', "=", "Track.Performer")
-                    ->where('Performer.DeleteDate', NULL);
-            })->orderBy('Performer')->get();
+            "tracks.name as Track",
+            "performers.name as Performer"
+        )->join('performers', function ($join) {
+                $join->on('performers.id', "=", "tracks.performer_id")
+                    ->where('performers.deleted_at', NULL);
+            })->orderBy('performer_id')->get();
 
         return $data ? $data->toArray() : [];
     }

app/Models/ORM/Track.php

@@ -9,11 +9,11 @@ class Track extends Model
 {
     use SoftDeletes;
 
-    const DELETED_AT = 'DeleteDate';
-    const UPDATED_AT = 'UpdatedDate';
-    const CREATED_AT = 'DateOfCreation';
+    const DELETED_AT = 'deleted_at';
+    const UPDATED_AT = 'updated_at';
+    const CREATED_AT = 'created_at';
 
     protected $primaryKey = 'Id';
-    protected $table = 'Track';
-    protected $fillable = ['Name', 'Length'];
+    protected $table = 'tracks';
+    protected $fillable = [ 'name', 'length' ];
 }