feat: add many playlist for music

app/Models/Music.php

@@ -20,12 +20,11 @@ class Music extends Model
     
 
     protected $fillable = [
-    'user_id', 'title', 'artist', 'file_path', 'type', 
-        'playlist_id', 'image_id', 'duration', 'order', 'is_active'
+    'user_id', 'title', 'artist', 'file_path', 'type',
+        'image_id', 'duration', 'is_active'
     ];
  protected $casts = [
         'duration' => 'integer',
-        'order' => 'integer',
         'is_active' => 'boolean',
     ];
     protected $attributes = [
@@ -36,9 +35,11 @@ public function user()
     {
         return $this->belongsTo(User::class);
     }
-     public function playlist(): BelongsTo
+     public function playlists(): BelongsToMany
     {
-        return $this->belongsTo(MusicPlaylist::class, 'playlist_id');
+        return $this->belongsToMany(MusicPlaylist::class, 'music_playlist', 'music_id', 'playlist_id')
+            ->withPivot('order')
+            ->withTimestamps();
     }
      public function tags(): BelongsToMany
     {