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-rw-r--r--activerecord/lib/active_record/associations/through_association.rb16
1 files changed, 10 insertions, 6 deletions
diff --git a/activerecord/lib/active_record/associations/through_association.rb b/activerecord/lib/active_record/associations/through_association.rb
index fcf3b219d4..f00fef8b9e 100644
--- a/activerecord/lib/active_record/associations/through_association.rb
+++ b/activerecord/lib/active_record/associations/through_association.rb
@@ -41,12 +41,16 @@ module ActiveRecord
def construct_join_attributes(*records)
ensure_mutable
- join_attributes = {
- source_reflection.foreign_key =>
- records.map { |record|
- record.send(source_reflection.association_primary_key(reflection.klass))
- }
- }
+ if source_reflection.association_primary_key(reflection.klass) == reflection.klass.primary_key
+ join_attributes = { source_reflection.name => records }
+ else
+ join_attributes = {
+ source_reflection.foreign_key =>
+ records.map { |record|
+ record.send(source_reflection.association_primary_key(reflection.klass))
+ }
+ }
+ end
if options[:source_type]
join_attributes[source_reflection.foreign_type] =