use request store to mitigate n+1 query

app/models/custom_value/user_strategy.rb

@@ -30,9 +30,11 @@
 class CustomValue::UserStrategy < CustomValue::FormatStrategy
   def typed_value
     unless value.blank?
+      RequestStore.fetch(:"user_custom_value_#{value}") do
         User.find_by(id: value)
       end
     end
+  end
 
   def validate_type_of_value
     unless custom_field.possible_values(custom_value.customized).include?(value)

app/models/custom_value/version_strategy.rb

@@ -30,9 +30,11 @@
 class CustomValue::VersionStrategy < CustomValue::FormatStrategy
   def typed_value
     unless value.blank?
+      RequestStore.fetch(:"version_custom_value_#{value}") do
         Version.find_by(id: value)
       end
     end
+  end
 
   def validate_type_of_value
     unless custom_field.possible_values(custom_value.customized).include?(value)