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-rw-r--r--activerecord/lib/active_record/collection_cache_key.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/collection_cache_key.rb b/activerecord/lib/active_record/collection_cache_key.rb
index b20df1c232..5dcc98424a 100644
--- a/activerecord/lib/active_record/collection_cache_key.rb
+++ b/activerecord/lib/active_record/collection_cache_key.rb
@@ -15,6 +15,7 @@ module ActiveRecord
column = "#{connection.quote_table_name(collection.table_name)}.#{connection.quote_column_name(timestamp_column)}"
query = collection
+ .unscope(:select)
.select("COUNT(*) AS size", "MAX(#{column}) AS timestamp")
.unscope(:order)
result = connection.select_one(query)