diff --git a/app/controllers/admin/cancerpredicts_controller.rb b/app/controllers/admin/cancerpredicts_controller.rb
index a04684e..cf1213b 100644
--- a/app/controllers/admin/cancerpredicts_controller.rb
+++ b/app/controllers/admin/cancerpredicts_controller.rb
@@ -330,7 +330,7 @@ class Admin::CancerpredictsController < OrbitAdminController
 	Dir.chdir("public") do
 		@site_locales = Site.last.in_use_locales.each do |locale|
 			I18n.with_locale(locale) do
-				@file_tmp = File.new('cancer_tool_table_tmp_'+locale.to_s+'.txt', 'w')
+				@file_tmp = File.new("#{Cancerpredictfields::ToolTablePrefix}#{I18n.locale}.txt", 'w')
 				tmp_table_texts = create_table(locale)
 				@file_tmp.write(tmp_table_texts)
 				@file_tmp.close
@@ -654,7 +654,7 @@ class Admin::CancerpredictsController < OrbitAdminController
 		Dir.chdir("public") do
 			@site_locales = Site.last.in_use_locales.each do |locale|
 				I18n.with_locale(locale) do
-					@file_tmp = File.new('cancer_tool_table_tmp_'+locale.to_s+'.txt', 'w')
+					@file_tmp = File.new("#{Cancerpredictfields::ToolTablePrefix}#{I18n.locale}.txt", 'w')
 					tmp_table_texts = create_table(locale)
 					@file_tmp.write(tmp_table_texts)
 					@file_tmp.close
diff --git a/app/controllers/cancerpredicts_controller.rb b/app/controllers/cancerpredicts_controller.rb
index 21c4868..f4d1efb 100644
--- a/app/controllers/cancerpredicts_controller.rb
+++ b/app/controllers/cancerpredicts_controller.rb
@@ -147,11 +147,11 @@ class CancerpredictsController < ApplicationController
 	uid = OrbitHelper.params[:uid] rescue ""
 	tags = OrbitHelper.widget_tags
 	categories = OrbitHelper.widget_categories || []
-	@table_str = File.read('public/cancer_tool_table_tmp_'+I18n.locale.to_s+'.txt')
+	@table_str = File.read("#{Cancerpredictfields::ToolTablePrefix}#{I18n.locale}.txt")
 	preidct_js_url = '/assets/cancer_predict.js'
-	if File.exist?('public/cancer_tool_js_filename.txt')
-		js_filename = File.read('public/cancer_tool_js_filename.txt')
-		if js_filename.match(/cancer_predict\.js$/)
+	if File.exist?(Cancerpredictfields::JSFileName)
+		js_filename = File.read(Cancerpredictfields::JSFileName)
+		if js_filename.include?('cancer_predict.js')
 			asset = Rails.application.assets[js_filename]
 			preidct_js_url = "#{Rails.application.config.assets.prefix}/#{asset.digest_path}"
 		else
@@ -167,11 +167,11 @@ class CancerpredictsController < ApplicationController
 	uid = OrbitHelper.params[:uid] rescue ""
 	tags = OrbitHelper.widget_tags
 	categories = OrbitHelper.widget_categories || []
-	@table_str = File.read('public/cancer_tool_table_tmp_'+I18n.locale.to_s+'.txt')
+	@table_str = File.read("#{Cancerpredictfields::ToolTablePrefix}#{I18n.locale}.txt")
 	preidct_js_url = '/assets/cancer_predict.js'
-	if File.exist?('public/cancer_tool_js_filename.txt')
-		js_filename = File.read('public/cancer_tool_js_filename.txt')
-		if js_filename.match(/cancer_predict\.js$/)
+	if File.exist?(Cancerpredictfields::JSFileName)
+		js_filename = File.read(Cancerpredictfields::JSFileName)
+		if js_filename.include?('cancer_predict.js')
 			asset = Rails.application.assets[js_filename]
 			preidct_js_url = "#{Rails.application.config.assets.prefix}/#{asset.digest_path}"
 		else
diff --git a/app/models/cancerpredictfields.rb b/app/models/cancerpredictfields.rb
index 90a7dff..915962c 100644
--- a/app/models/cancerpredictfields.rb
+++ b/app/models/cancerpredictfields.rb
@@ -9,6 +9,8 @@ class Cancerpredictfields
   AdvanceFields = ["revert_value","map_values","cancer_predict_mapping_file"]
   TherapyFields = ["variable","name","hint","comment_text","choice_fields","lpv_impact","active_choice","disable_condition"]
   TherapyOnly = ["lpv_impact","active_choice","disable_condition"]
+  JSFileName = "public/cancer_tool_js_filename.txt".freeze
+  ToolTablePrefix = "public/cancer_tool_table_tmp_".freeze
   field :title ,type:String ,default:""
   field :advance_mode, type: Boolean, default: false
   field :form_show ,  :type=> Hash ,default:{
@@ -287,7 +289,7 @@ class Cancerpredictfields
   end
   def reload_js_asset(path, force_reload=false)
     reload_any_asset(path, 'application/javascript', force_reload) do |new_path|
-      File.open("#{Rails.root}/public/cancer_tool_js_filename.txt",'w+'){|f| f.write(new_path)}
+      File.open(JSFileName, 'w+'){|f| f.write(new_path)}
     end
   end
   def generate_eval_formula
@@ -482,8 +484,8 @@ class Cancerpredictfields
     if need_write
       File.write(save_path,file_texts)
       reload_js_asset(save_path, force_reload)
-    elsif !(File.exist?("#{Rails.root}/public/cancer_tool_js_filename.txt"))
-      File.open("#{Rails.root}/public/cancer_tool_js_filename.txt",'w+'){|f| f.write(save_path)}
+    elsif !(File.exist?(JSFileName))
+      File.open(JSFileName, 'w+'){|f| f.write(save_path)}
     end
   end
   def get_years_settings_dict