rails 3.0.12 how to check what version of activerecord do i have?

Question

Maybe it's a silly question but I need multiple primary keys in some tables something like...

create table t1
(
 id int not null
 id_something int not null
 .
 .
 .
 primary key (id, id_something)
)

I googled and I found this gem http://rubygems.org/gems/composite_primary_keys

but I couldn't find what activerecord version do I have

I'm using rails 3.0.12 and ruby 1.9.2p320

Answer 1

Run bundle show activerecord at the terminal.