Refactor article getter for descriptions & tags, minor fixes on tags

app/Models/Shop/Merchandise.php

@@ -24,8 +24,18 @@ class Merchandise extends Model implements HasMedia
         return $this->morphMany(Article::class, 'product');
     }
 
+    public function Producer()
+    {
+        return $this->belongsTo(Producer::class);
+    }
+
     public function tags()
     {
         return $this->morphToMany(Tag::class, 'taggable');
     }
+
+    public function scopeByProducer($query, $producer_id)
+    {
+        return $query->where('producer_id', $producer_id);
+    }
 }