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-rw-r--r--activerecord/lib/active_record/reflection.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/activerecord/lib/active_record/reflection.rb b/activerecord/lib/active_record/reflection.rb
index 62184eeff2..3d76ffe776 100644
--- a/activerecord/lib/active_record/reflection.rb
+++ b/activerecord/lib/active_record/reflection.rb
@@ -207,7 +207,7 @@ module ActiveRecord
def derive_primary_key_name
if macro == :belongs_to
- class_name.foreign_key
+ "#{name}_id"
elsif options[:as]
"#{options[:as]}_id"
else