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-rw-r--r--activerecord/lib/active_record/relation/spawn_methods.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/activerecord/lib/active_record/relation/spawn_methods.rb b/activerecord/lib/active_record/relation/spawn_methods.rb
index b734fc5c51..93fa30eb38 100644
--- a/activerecord/lib/active_record/relation/spawn_methods.rb
+++ b/activerecord/lib/active_record/relation/spawn_methods.rb
@@ -151,7 +151,7 @@ module ActiveRecord
values = other.joins_values
return if values.blank?
- if other.klass == relation.klass
+ if other.klass >= relation.klass
relation.joins_values += values
else
joins_dependency, rest = values.partition do |join|