UnionOfRAD/lithium — pull request #361 by nealerickson (2012-02-28 01:31:42+00:00)
Title: Support for NULL value in hasMany constraint configuration

Prior to this change you were unable to build IS NULL constraints with a hasMany relationship definition. Using 'constraint' => array('Notes.deleted_at' => null) would be ignored since the value was neither a string nor an array.