order should always be concatenated.

order that is declared first has highest priority in all cases.

Here are some examples.

Car.order('name desc').find(:first, :order => 'id').name

Car.named_scope_with_order.named_scope_with_another_order

Car.order('id DESC').scoping do
  Car.find(:first, :order => 'id asc')
end

No special treatment to with_scope or scoping.

Also note that if default_scope declares an order then the order
declared in default_scope has the highest priority unless
with_exclusive_scope is used.

Signed-off-by: Santiago Pastorino <santiago@wyeworks.com>

Author: Neeraj Singh

activerecord/lib/active_record/relation/spawn_methods.rb

@@ -99,9 +99,8 @@ def apply_finder_options(options)
 
       relation = relation.readonly(options[:readonly]) if options.key? :readonly
 
-      # Give precedence to newly-applied orders and groups to play nicely with with_scope
       [:group, :order].each do |finder|
-        relation.send("#{finder}_values=", Array.wrap(options[finder]) + relation.send("#{finder}_values")) if options.has_key?(finder)
+        relation.send("#{finder}_values=", relation.send("#{finder}_values") + Array.wrap(options[finder])) if options.has_key?(finder)
       end
 
       relation = relation.where(options[:conditions]) if options.has_key?(:conditions)

activerecord/test/cases/base_test.rb

@@ -1139,18 +1139,18 @@ def test_scoped_find_order
     scoped_developers = Developer.send(:with_scope, :find => { :limit => 1 }) do
       Developer.find(:all, :order => 'salary DESC')
     end
-    # Test scope order + find order, find has priority
+    # Test scope order + find order, order has priority
     scoped_developers = Developer.send(:with_scope, :find => { :limit => 3, :order => 'id DESC' }) do
       Developer.find(:all, :order => 'salary ASC')
     end
     assert scoped_developers.include?(developers(:poor_jamis))
-    assert scoped_developers.include?(developers(:david))
+    assert ! scoped_developers.include?(developers(:david))
     assert ! scoped_developers.include?(developers(:jamis))
     assert_equal 3, scoped_developers.size
 
     # Test without scoped find conditions to ensure we get the right thing
-    developers = Developer.find(:all, :order => 'id', :limit => 1)
-    assert scoped_developers.include?(developers(:david))
+    assert ! scoped_developers.include?(Developer.find(1))
+    assert scoped_developers.include?(Developer.find(11))
   end
 
   def test_scoped_find_limit_offset_including_has_many_association

activerecord/test/cases/relation_scoping_test.rb

@@ -398,8 +398,8 @@ def test_nested_exclusive_scope
     assert_equal expected, received
   end
 
-  def test_overwriting_default_scope
-    expected = Developer.find(:all, :order => 'salary').collect { |dev| dev.salary }
+  def test_order_in_default_scope_should_prevail
+    expected = Developer.find(:all, :order => 'salary desc').collect { |dev| dev.salary }
     received = DeveloperOrderedBySalary.find(:all, :order => 'salary').collect { |dev| dev.salary }
     assert_equal expected, received
   end

activerecord/test/cases/relations_test.rb

@@ -667,4 +667,22 @@ def test_order_by_relation_attribute
   def test_relations_limit_with_conditions_or_limit
     assert_equal Post.limit(2).size, Post.limit(2).all.size
   end
+
+  def test_order_with_find_with_order
+    assert_equal 'zyke', Car.order('name desc').find(:first, :order => 'id').name
+  end
+
+  def test_default_scope_order_with_named_scope_order
+    assert_equal 'zyke', Car.order_using_new_style.limit(1).first.name
+    assert_equal 'zyke', Car.order_using_old_style.limit(1).first.name
+  end
+
+  def test_order_using_scoping
+    car = Car.order('id DESC').scoping do
+      Car.find(:first, :order => 'id asc')
+    end
+    assert_equal 'zyke', car.name
+  end
+
+
 end

activerecord/test/fixtures/cars.yml

@@ -2,3 +2,8 @@ honda:
   id: 1
   name: honda
   engines_count: 0
+
+zyke:
+  id: 2
+  name: zyke
+  engines_count: 0

activerecord/test/models/car.rb

@@ -7,4 +7,9 @@ class Car < ActiveRecord::Base
   scope :incl_tyres, includes(:tyres)
   scope :incl_engines, includes(:engines)
 
+  default_scope :order => 'name desc'
+
+  scope :order_using_new_style,  order('name asc')
+  scope :order_using_old_style,  :order => 'name asc'
+
 end