Data from relational table

Hello! I have a problem with the following. I am trying to get data from a relational table but I keep getting null. I read the data using an application on heroku that works with the database. I have created clients and dto objects. The “setColumns” method works good, unfortunately the “addColumn” method still returns null. Please give me some advice. Thanks.

I don’t see anything immediately wrong with your code. Try adding a breakpoint on the addColumn code and see if you can spot anything odd.