Make autogenerated fields a named constant

app/models/case_log.rb

@@ -28,6 +28,8 @@ class CaseLog < ApplicationRecord
 
   enum status: { "in progress" => 0, "submitted" => 1 }
 
+  AUTOGENERATED_FIELDS = %w[status created_at updated_at id].freeze
+
   def instance_validations
     validates_with CaseLogValidator, ({ previous_page: @previous_page } || {})
   end
@@ -37,8 +39,7 @@ class CaseLog < ApplicationRecord
   end
 
   def all_fields_completed?
-    non_mandatory_fields = %w[status created_at updated_at id]
+    mandatory_fields = attributes.except(*AUTOGENERATED_FIELDS)
-    mandatory_fields = attributes.except(*non_mandatory_fields)
     mandatory_fields.none? { |_key, val| val.nil? }
   end
 end