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-rw-r--r--activerecord/lib/active_record/relation.rb2
1 files changed, 2 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/relation.rb b/activerecord/lib/active_record/relation.rb
index a20c152eeb..8577ec58f7 100644
--- a/activerecord/lib/active_record/relation.rb
+++ b/activerecord/lib/active_record/relation.rb
@@ -1,3 +1,5 @@
+require 'active_support/core_ext/object/blank'
+
module ActiveRecord
class Relation
JoinOperation = Struct.new(:relation, :join_class, :on)