Take my domain class for example

public class Person
{
  private Integer id;
  private String name;
  private String address;
  private String telephone;

  //Accessors here..
}



Take my domain class for example


This is great for storing 1 instance of a given Person, however, the name for example would most likely change over time, and I would like to retain any previous values, I may wish to see what addresses this person has lived at over the past 10 years.

What are my options for doing this? This is a Java web app so I could potentially have an AUDIT_LOG table on my schema, but that doesn't sound a very reliable way of keeping track of these changes

Another thought is to have a PersonFamily and keep all instances of person, assuming the last item in the List is the most recent, such as..


Any suggestions on how I can achieve this? Is there a really clean and simple process I've missed?

Thanks




Is there anywhere in your code where you set your session.IDUsers? You initialize it as a blank ''. Coldfusion does not populate it for you. The session scope is a place that will remember things for that user that you put there for a specified period of time inactivity, usually 20 minutes. So hopefully, somewhere before you run your query you have additional logic that fills that in, otherwise you are asking the database for a user named, ''.

This is just a point of style, but the following may work better for you:


Putting the cfoutput outside the paragraph block will make it easier if you have additional variables to insert into the text. (but will work either way)

Regardless of all that, unless you forgot to share a bit more of the code, I think the issue is that the session.IDUsers is blank and needs to be populated before the query. I hope this helps!

        

            

javaaudit-trail