Refactor code

app/services/product_filter.rb

 class ProductFilter
-  def filter_product_title(title)
+  def self.filter_product_title(title)
     title.blank? ? 'title:*' : "title:#{RSolr.solr_escape(title)}"
   end
 
-  def filter_suggest_keyword(keyword)
+  def self.filter_suggest_keyword(keyword)
     RSolr.solr_escape(keyword)
   end
 end
\ No newline at end of file

app/services/search.rb

@@ -5,7 +5,8 @@ class Search
 
   # Get matched products with keyword
   def products(search_query)
-    matched_products(ProductFilter.filter_product_title(search_query))
+    @products_indexes = @solr.exec_select_request(ProductFilter.filter_product_title(search_query))
+    matched_products(@products_indexes)
   end
 
   # Get suggested keywords