Add display of shelve

app/Models/Shop/Article.php

@@ -78,9 +78,9 @@ class Article extends Model implements HasMedia
 
     public function scopeByCategory($query, $category_id)
     {
-        return $query->whereHas('categories', function ($query) use ($category_id) {
+        return $category_id ? $query->whereHas('categories', function ($query) use ($category_id) {
             $query->where('id', $category_id);
-        });
+        }) : $query;
     }
 
     public function scopeByProduct($query, $model)
@@ -93,6 +93,20 @@ class Article extends Model implements HasMedia
         return $query->where($this->table . '.product_id', $model_id);
     }
 
+    public function scopeByTag($query, $tag_id)
+    {
+        return $tag_id ? $query->whereHas('tags', function ($query) use ($tag_id) {
+            $query->where('id', $tag_id);
+        }) : $query;
+    }
+
+    public function scopeByTags($query, $tags)
+    {
+        return $tags ? $query->whereHas('tags', function ($query) use ($tags) {
+            $query->whereIn('id', $tags);
+        }) : $query;
+    }
+
     public function scopeWithOffers($query)
     {
         return $query->has('offers');