kohana/orm — pull request #90 by alexbarkar (2013-11-01 21:12:29+00:00)
Title: ->has() method will return true, if many-to-many 'through' table has dup...

...licate rows.

Previously: if there are two rows in 'through' table, it will return false. This situation could happen if the table has no appropriate unique indexes and ->add was used more than once.