Make sure has_many associations honour :include when counting. Closes #9167 [danger]

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@7325 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

activerecord/CHANGELOG

@@ -1,5 +1,7 @@
 *SVN*
 
+* Make sure has_many uses :include when counting [danger]
+
 * Change the implementation of ActiveRecord's attribute reader and writer methods [nzkoz]
  - Generate Reader and Writer methods which cache attribute values in hashes.  This is to avoid repeatedly parsing the same date or integer columns.
  - Change exception raised when users use find with :select then try to access a skipped column.  Plugins could override missing_attribute() to lazily load the columns.

activerecord/lib/active_record/associations/has_many_association.rb

@@ -99,7 +99,7 @@ module ActiveRecord
           elsif @reflection.options[:counter_sql]
             @reflection.klass.count_by_sql(@counter_sql)
           else
-            @reflection.klass.count(:conditions => @counter_sql)
+            @reflection.klass.count(:conditions => @counter_sql, :include => @reflection.options[:include])
           end
           
           @target = [] and loaded if count == 0

activerecord/test/associations/eager_test.rb

@@ -272,6 +272,13 @@ class EagerAssociationTest < Test::Unit::TestCase
     assert_equal companies(:first_firm, :reload).account, f.account
   end
   
+  def test_eager_with_multi_table_conditional_properly_counts_the_records_when_using_size
+    author = authors(:david)
+    posts_with_no_comments = author.posts.select { |post| post.comments.blank? }
+    assert_equal posts_with_no_comments.size, author.posts_with_no_comments.size
+    assert_equal posts_with_no_comments, author.posts_with_no_comments
+  end
+
   def test_eager_with_invalid_association_reference
     assert_raises(ActiveRecord::ConfigurationError, "Association was not found; perhaps you misspelled it?  You specified :include => :monkeys") {
       post = Post.find(6, :include=> :monkeys )

activerecord/test/fixtures/author.rb

@@ -25,6 +25,7 @@ class Author < ActiveRecord::Base
 
   has_many :hello_posts, :class_name => "Post", :conditions => "posts.body = 'hello'"
   has_many :hello_post_comments, :through => :hello_posts, :source => :comments
+  has_many :posts_with_no_comments, :class_name => 'Post', :conditions => 'comments.id is null', :include => :comments
 
   has_many :other_posts,          :class_name => "Post"
   has_many :posts_with_callbacks, :class_name => "Post", :before_add => :log_before_adding,