fix for last being broken with reorder descending

lib/squeel/adapters/active_record/4.1/relation_extensions.rb

@@ -226,7 +226,7 @@ def build_from
         def build_order(arel)
           orders = order_visit(dehashified_order_values)
           orders = orders.uniq.reject(&:blank?)
-          orders = reverse_sql_order(orders) if reverse_order_value && !reordering_value
+          orders = reverse_sql_order(orders) if reverse_order_value
 
           arel.order(*orders) unless orders.empty?
         end

lib/squeel/adapters/active_record/relation_extensions.rb

@@ -216,6 +216,11 @@ def reorder(*args)
           end
         end
 
+        def reorder!(*args)
+          self.reverse_order_value = false
+          super
+        end
+
         def joins(*args)
           if block_given? && args.empty?
             super(DSL.eval &Proc.new)

spec/squeel/adapters/active_record/relation_extensions_spec.rb

@@ -221,6 +221,14 @@ module ActiveRecord
             ordered.to_sql.scan('name').should have(1).item
           end
 
+          it 'returns the first item when #last is called after reversing the order' do
+            sorted_people = Person.all.to_a.sort {|a, b| a.name.downcase <=> b.name.downcase}
+            Person.order(name: :desc).first.should eq sorted_people.last
+            Person.order(name: :desc).last.should eq sorted_people.first
+            Person.reorder(name: :desc).first.should eq sorted_people.last
+            Person.reorder(:name).reverse_order.last.should eq sorted_people.first
+            Person.reorder(name: :desc).last.should eq sorted_people.first # this fails
+          end
         end
 
         describe '#to_sql' do