Fixes on new model

app/Models/Shop/ArticlePrice.php

@@ -3,9 +3,12 @@
 namespace App\Models\Shop;
 
 use Illuminate\Database\Eloquent\Model;
+use Znck\Eloquent\Traits\BelongsToThrough;
 
 class ArticlePrice extends Model
 {
+    use BelongsToThrough;
+
     protected $guarded = ['id']; 
     protected $table = 'shop_article_prices';
 
@@ -16,7 +19,21 @@ class ArticlePrice extends Model
 
     public function article()
     {
-        return $this->belongsTo('App\Models\Shop\Article');
+        return $this->belongsToThrough(
+            'App\Models\Shop\Article',
+            'App\Models\Shop\ArticleAttribute',
+            null,
+            '',
+            ['App\Models\Shop\Article' => 'article_id', 'App\Models\Shop\ArticleAttribute' => 'article_attribute_id']
+        );
+    }
+
+    public function scopeByArticle($query, $id)
+    {
+        return $query->whereHas('article', function ($query) use ($id) {
+            $query->byArticle($id);
+        });
+
     }
 
 }