Make scoped reorder override previous applied orders

[5528 state:committed]

activerecord/lib/active_record/relation/query_methods.rb

@@ -6,7 +6,7 @@ module QueryMethods
     extend ActiveSupport::Concern
 
     attr_accessor :includes_values, :eager_load_values, :preload_values,
-                  :select_values, :group_values, :order_values, :joins_values, :where_values, :having_values,
+                  :select_values, :group_values, :order_values, :reorder_flag, :joins_values, :where_values, :having_values,
                   :limit_value, :offset_value, :lock_value, :readonly_value, :create_with_value, :from_value
 
     def includes(*args)
@@ -53,7 +53,10 @@ def order(*args)
 
     def reorder(*args)
       relation = clone
-      relation.order_values = args if args.present?
+      if args.present?
+        relation.order_values = args
+        relation.reorder_flag = true
+      end
       relation
     end
 

activerecord/lib/active_record/relation/spawn_methods.rb

@@ -18,11 +18,20 @@ def merge(r)
         end
       end
 
-      (Relation::MULTI_VALUE_METHODS - [:joins, :where]).each do |method|
+      (Relation::MULTI_VALUE_METHODS - [:joins, :where, :order]).each do |method|
         value = r.send(:"#{method}_values")
         merged_relation.send(:"#{method}_values=", merged_relation.send(:"#{method}_values") + value) if value.present?
       end
 
+      order_value = r.order_values
+      if order_value.present?
+        if r.reorder_flag
+          merged_relation.order_values = order_value
+        else
+          merged_relation.order_values = merged_relation.order_values + order_value
+        end
+      end
+
       merged_relation = merged_relation.joins(r.joins_values)
 
       merged_wheres = @where_values