This question is more towards understanding how things work rather than
trying to just get something to work.
I have something like this in my user model.
first_name + " " + last_name
This works find if I use it for display values in a
options_from_collection_for_select( @users, :id, :full_name)
that probably uses send to call the method (which doesn't care about private methods)
It displays the full name in the selection box options.
But if I try to go <%=h @user.full_name %> I get an error saying
"private method `full_name' called for <...>"
Can I ask the obvious question: is the full_name method private?