Fixing has_many association when ActiveRecord::Base.pluralize_table_names is false. fixes #557

activerecord/lib/active_record/associations/alias_tracker.rb

@@ -50,7 +50,7 @@ def aliased_name_for(table_name, aliased_name = nil)
       end
 
       def pluralize(table_name)
-        ActiveRecord::Base.pluralize_table_names ? table_name.to_s.pluralize : table_name
+        ActiveRecord::Base.pluralize_table_names ? table_name.to_s.pluralize : table_name.to_s
       end
 
       private

activerecord/test/cases/associations/join_model_test.rb

@@ -13,6 +13,8 @@
 require 'models/edge'
 require 'models/book'
 require 'models/citation'
+require 'models/aircraft'
+require 'models/engine'
 
 class AssociationsJoinModelTest < ActiveRecord::TestCase
   self.use_transactional_fixtures = false unless supports_savepoints?
@@ -704,6 +706,15 @@ def test_has_many_through_goes_through_all_sti_classes
     assert_equal [9, 10, new_comment.id], authors(:david).sti_post_comments.map(&:id).sort
   end
 
+  def test_has_many_with_pluralize_table_names_false
+    engine = Engine.create(:car_id => 1)
+    Aircraft.pluralize_table_names = false
+    aircraft = Aircraft.create!(:name => "Airbus 380", :id => 1)
+    assert_equal aircraft.engines, [engine]
+  ensure
+    ActiveRecord::Base.pluralize_table_names = true
+  end
+
   private
     # create dynamic Post models to allow different dependency options
     def find_post_with_dependency(post_id, association, association_name, dependency)

activerecord/test/models/aircraft.rb

+class Aircraft < ActiveRecord::Base
+  has_many :engines, :foreign_key => "car_id"
+end

activerecord/test/schema/schema.rb

@@ -40,6 +40,10 @@ def create_table(*args, &block)
     t.references :account
   end
 
+  create_table :aircraft, :force => true do |t|
+    t.string :name
+  end
+
   create_table :audit_logs, :force => true do |t|
     t.column :message, :string, :null=>false
     t.column :developer_id, :integer, :null=>false