change search controller received types and tags to array format

app/controllers/v1/search_controller.rb

@@ -25,6 +25,6 @@ class V1::SearchController < ApplicationController
 
   # Never trust parameters from the scary internet, only allow the white list through.
   def search_params
-    params.permit(:page, :results_per_page, :order, :query, :search_class, :tags, :types)
+    params.permit(:page, :results_per_page, :order, :query, :search_class, tags: [], types: [])
   end
 end

app/services/search_service/learning_object.rb

@@ -18,8 +18,8 @@ module SearchService
 
     def where_hash
       hash = {}
-      hash[:tags] = { all: @search.tags.split(',').collect(&:strip) } unless @search.tags.blank?
-      hash[:object_type] = @search.types.split(',').collect(&:strip) unless @search.types.blank?
+      hash[:tags] = @search.tags unless @search.tags.blank?
+      hash[:object_type] = @search.types unless @search.types.blank?
       hash[:state] = validate_object
       hash.blank? ? nil : hash
     end