How can I do a LEFT OUTER JOIN using Rails ActiveRecord?

Question

I don\'t have any ideas. Could you give me any clues (like reference sites). Any help will be appreciated.

Model1: GROUP         


        

Answer 1

You can do this in rails 3.x regardless if you are referencing the table or not in a where clause:

Group.eager_load(:user_group_cmb)

...and it will perform a left outter join