change response for index to name for issue

app/controllers/issues_controller.rb

@@ -50,7 +50,23 @@ class IssuesController < ApplicationController
   end
 
   def index_to_name
-    issues_result = @project.issues.where(project_issues_index:params[:index]).map{|e|{id:e.id,project_issues_index:e.project_issues_index,subject:e.subject}}
+    issues_index = params[:index].map(&:to_i)
+    exit_index = []
+    issues_result = @project.issues.where(project_issues_index:issues_index).map{ |e|
+      exit_index << e.project_issues_index
+      { 
+        id:e.id,
+        project_issues_index:e.project_issues_index,
+        subject:e.subject
+      }
+      
+    }
+    not_exit = issues_index - exit_index
+    not_exit.map{|e|
+      issues_result << {id: nil,
+        project_issues_index:e,
+        subject: nil}
+    }
     render json: issues_result
   end