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-rw-r--r--activerecord/lib/active_record/associations.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/activerecord/lib/active_record/associations.rb b/activerecord/lib/active_record/associations.rb
index 65daa8ffbe..11555b88e0 100644
--- a/activerecord/lib/active_record/associations.rb
+++ b/activerecord/lib/active_record/associations.rb
@@ -889,7 +889,7 @@ module ActiveRecord
# Specifies type of the source association used by <tt>has_many :through</tt> queries where the source
# association is a polymorphic +belongs_to+.
# [:uniq]
- # If true, duplicates will be omitted from the collection. Useful in conjunction with <tt>:through</tt>.
+ # If true, duplicates will be omitted from the collection. Works only in conjunction with <tt>:through</tt>.
# [:readonly]
# If true, all the associated objects are readonly through the association.
# [:validate]