Make habtm respect the :select option. Closes #9207. [Aleksey Kondratenko]

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@7279 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

activerecord/lib/active_record/associations/has_and_belongs_to_many_association.rb

@@ -53,7 +53,6 @@ module ActiveRecord
           options[:conditions] = conditions
           options[:joins]      = @join_sql
           options[:readonly]   = finding_with_ambigious_select?(options[:select])
-          options[:select]   ||= '*'
 
           if options[:order] && @reflection.options[:order]
             options[:order] = "#{options[:order]}, #{@reflection.options[:order]}"
@@ -63,6 +62,8 @@ module ActiveRecord
 
           merge_options_from_reflection!(options)
 
+          options[:select]   ||= '*'
+
           # Pass through args exactly as we received them.
           args << options
           @reflection.klass.find(*args)

activerecord/test/associations_test.rb

@@ -1761,6 +1761,13 @@ class HasAndBelongsToManyAssociationsTest < Test::Unit::TestCase
     assert welcome.save!
   end
 
+  def test_habtm_respects_select
+    categories(:technology).select_testing_posts(true).each do |o|
+      assert_respond_to o, :correctness_marker
+    end
+    assert_respond_to categories(:technology).select_testing_posts.find(:first), :correctness_marker
+  end
+
   def test_updating_attributes_on_rich_associations
     david = projects(:action_controller).developers.first
     david.name = "DHH"

activerecord/test/fixtures/category.rb

@@ -3,6 +3,12 @@ class Category < ActiveRecord::Base
   has_and_belongs_to_many :special_posts, :class_name => "Post"
   has_and_belongs_to_many :other_posts, :class_name => "Post"
   
+  has_and_belongs_to_many(:select_testing_posts,
+                          :class_name => 'Post',
+                          :foreign_key => 'category_id',
+                          :association_foreign_key => 'post_id',
+                          :select => 'posts.*, 1 as correctness_marker')
+
   def self.what_are_you
     'a category...'
   end