No need to create a new relation if the argument is blank.

2 files changed, 11 insertions, 11 deletions

diff --git a/activerecord/lib/active_record/relation.rb b/activerecord/lib/active_record/relation.rb
index b69a12bc7b..570ba3f80d 100644
--- a/activerecord/lib/active_record/relation.rb
+++ b/activerecord/lib/active_record/relation.rb
@@ -21,27 +21,27 @@ module ActiveRecord
     end
 
     def select(selects)
-      Relation.new(@klass, @relation.project(selects))
+      selects.blank? ? self : Relation.new(@klass, @relation.project(selects))
     end
 
     def group(groups)
-      Relation.new(@klass, @relation.group(groups))
+      groups.blank? ? self : Relation.new(@klass, @relation.group(groups))
     end
 
     def order(orders)
-      Relation.new(@klass, @relation.order(orders))
+      orders.blank? ? self : Relation.new(@klass, @relation.order(orders))
     end
 
     def limit(limits)
-      Relation.new(@klass, @relation.take(limits))
+      limits.blank? ? self : Relation.new(@klass, @relation.take(limits))
     end
 
     def offset(offsets)
-      Relation.new(@klass, @relation.skip(offsets))
+      offsets.blank? ? self : Relation.new(@klass, @relation.skip(offsets))
     end
 
     def on(join)
-      Relation.new(@klass, @relation.on(join))
+      join.blank? ? self : Relation.new(@klass, @relation.on(join))
     end
 
     def joins(join, join_type = nil)
diff --git a/arel b/arel
-Subproject 3d747a56b76ae97645dd265cc75e73e5f782719
+Subproject 755a7ced2f98b0bb246089c80cdfa04cd918fa8