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-rwxr-xr-xactiverecord/lib/active_record/associations.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/associations.rb b/activerecord/lib/active_record/associations.rb
index c0741bb572..547df9c684 100755
--- a/activerecord/lib/active_record/associations.rb
+++ b/activerecord/lib/active_record/associations.rb
@@ -2085,6 +2085,7 @@ module ActiveRecord
def association_join
connection = reflection.active_record.connection
+
join = case reflection.macro
when :has_and_belongs_to_many
["%s.%s = %s.%s " % [