Fix find_by_last when order is given [#2127 state:committed]

Signed-off-by: David Heinemeier Hansson <david@loudthinking.com>

activerecord/lib/active_record/base.rb

@@ -2174,7 +2174,7 @@ def default_scope(options = {})
         # Test whether the given method and optional key are scoped.
         def scoped?(method, key = nil) #:nodoc:
           if current_scoped_methods && (scope = current_scoped_methods[method])
-            !key || scope.has_key?(key)
+            !key || !scope[key].nil?
           end
         end
 

activerecord/test/cases/associations/has_many_associations_test.rb

@@ -70,6 +70,10 @@ def test_find_many_with_merged_options
     assert_equal 2, companies(:first_firm).limited_clients.find(:all, :limit => nil).size
   end
 
+  def test_dynamic_find_last_without_specified_order
+    assert_equal companies(:second_client), companies(:first_firm).unsorted_clients.find_last_by_type('Client')
+  end
+
   def test_dynamic_find_should_respect_association_order
     assert_equal companies(:second_client), companies(:first_firm).clients_sorted_desc.find(:first, :conditions => "type = 'Client'")
     assert_equal companies(:second_client), companies(:first_firm).clients_sorted_desc.find_by_type('Client')

activerecord/test/cases/reflection_test.rb

@@ -170,8 +170,8 @@ def test_association_reflection_in_modules
 
   def test_reflection_of_all_associations
     # FIXME these assertions bust a lot
-    assert_equal 27, Firm.reflect_on_all_associations.size
-    assert_equal 20, Firm.reflect_on_all_associations(:has_many).size
+    assert_equal 28, Firm.reflect_on_all_associations.size
+    assert_equal 21, Firm.reflect_on_all_associations(:has_many).size
     assert_equal 7, Firm.reflect_on_all_associations(:has_one).size
     assert_equal 0, Firm.reflect_on_all_associations(:belongs_to).size
   end

activerecord/test/models/company.rb

@@ -37,6 +37,7 @@ class Firm < Company
   has_many :clients, :order => "id", :dependent => :destroy, :counter_sql =>
       "SELECT COUNT(*) FROM companies WHERE firm_id = 1 " +
       "AND (#{QUOTED_TYPE} = 'Client' OR #{QUOTED_TYPE} = 'SpecialClient' OR #{QUOTED_TYPE} = 'VerySpecialClient' )"
+  has_many :unsorted_clients, :class_name => "Client"
   has_many :clients_sorted_desc, :class_name => "Client", :order => "id DESC"
   has_many :clients_of_firm, :foreign_key => "client_of", :class_name => "Client", :order => "id"
   has_many :unvalidated_clients_of_firm, :foreign_key => "client_of", :class_name => "Client", :validate => false