Question

I seem to be running into a problem with Rails 3 and I can’t seem to figure it out.
Here’s what I am trying to do:

att1 = "column"
att2 = "1"
final_column = "#{att1}_#{att2}"

obj.final_column = 4
  ====> Error
  -----> NoMethodError: undefined method `final_column=' for class....

If I do this it works though:

obj.column1=4

What can I do to my final_column to make it work?
Thanks!

Answer 1

You want to do this:

obj.send("#{final_column}=", 4) 

If you want to respect the private/protected visibliy, use public_send instead of send.