1 files changed, 20 insertions, 0 deletions
diff --git a/activerecord/CHANGELOG.md b/activerecord/CHANGELOG.md
index 50a0b291b3..faab0f9554 100644
--- a/activerecord/CHANGELOG.md
+++ b/activerecord/CHANGELOG.md
@@ -1,3 +1,23 @@
+*   Rework `ActiveRecord::Relation#last` 
+    
+    1. Always find last with ruby if relation is loaded
+    2. Always use SQL instead if relation is not loaded.
+    3. Deprecated relation loading when SQL order can not be automatically reversed
+
+        Topic.order("title").load.last(3)
+          # before: SELECT ...
+          # after: No SQL
+
+        Topic.order("title").last
+          # before: SELECT * FROM `topics`
+          # after:  SELECT * FROM `topics` ORDER BY `topics`.`title` DESC LIMIT 1
+
+        Topic.order("coalesce(author, title)").last
+          # before: SELECT * FROM `topics`
+          # after:  Deprecation Warning for irreversible order
+
+    *Bogdan Gusiev*
+
 *   `ActiveRecord::Relation#reverse_order` throws `ActiveRecord::IrreversibleOrderError`
     when the order can not be reversed using current trivial algorithm.
     Also raises the same error when `#reverse_order` is called on