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-rw-r--r--activerecord/lib/active_record/associations/has_many_through_association.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/associations/has_many_through_association.rb b/activerecord/lib/active_record/associations/has_many_through_association.rb
index bd2acd4340..5338bb099d 100644
--- a/activerecord/lib/active_record/associations/has_many_through_association.rb
+++ b/activerecord/lib/active_record/associations/has_many_through_association.rb
@@ -1,4 +1,5 @@
require "active_record/associations/through_association_scope"
+require 'active_support/core_ext/object/blank'
module ActiveRecord
module Associations