diff options
Diffstat (limited to 'activerecord/lib')
| -rw-r--r-- | activerecord/lib/active_record/associations/preloader/through_association.rb | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/associations/preloader/through_association.rb b/activerecord/lib/active_record/associations/preloader/through_association.rb index ad6374d09a..30558ae29c 100644 --- a/activerecord/lib/active_record/associations/preloader/through_association.rb +++ b/activerecord/lib/active_record/associations/preloader/through_association.rb @@ -33,8 +33,13 @@ module ActiveRecord through_options ).run + # TODO: Verify that this is actually necessary and not just a symptom of an + # underlying inefficiency + identity_map = {} + Hash[owners.map do |owner| through_records = Array.wrap(owner.send(through_reflection.name)) + through_records.map! { |record| identity_map[record] ||= record } # Dont cache the association - we would only be caching a subset if reflection.options[:source_type] && through_reflection.collection? |