diff options
Diffstat (limited to 'activerecord/lib/active_record/reflection.rb')
| -rw-r--r-- | activerecord/lib/active_record/reflection.rb | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/reflection.rb b/activerecord/lib/active_record/reflection.rb index ae90d30b42..888ddcdd5b 100644 --- a/activerecord/lib/active_record/reflection.rb +++ b/activerecord/lib/active_record/reflection.rb @@ -352,6 +352,21 @@ module ActiveRecord def through_reflection @through_reflection ||= active_record.reflect_on_association(options[:through]) end + + # A :through reflection may have a :through reflection itself. This method returns the through + # reflection which is furthest away, i.e. the last in the chain, so the first which does not + # have its own :through reflection. + def final_through_reflection + @final_through_reflection ||= begin + reflection = through_reflection + + while reflection.through_reflection + reflection = reflection.through_reflection + end + + reflection + end + end # Gets an array of possible <tt>:through</tt> source reflection names: # |