Sorting in rails 2.3.5 not same as sorting in (Rails 3.2.8)

In rails 2.3.5 (with active scaffold) all my columns in display were
sorted even though they belonged to a related table. But in Rails 3.2.8
, only columns which belong to the main table are sorted .To sort a
related table column we need to specifically add the line below

columns[:columnfromtable2].sort_by :sql => ['name']

I have many columns which are 'related' in many pages , it would be
tedious to add this line in them all

solved!!