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

Couldn't comment to an earlier answer because well I don't have 50 reputation. But here's how it worked for me when I ran into below error

includes-referenced relation raises a StatementInvalid exception, complaining it misses a FROM-clause entry. I need to add an explicit call to join, which defaults to being inner.

I had to use .references and mention the table name or for it get added to the FROM-clause