Allow #count through a has_many association to accept :include. [Dan Peterson]

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@4618 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

activerecord/CHANGELOG

 *SVN*
 
+* Allow #count through a has_many association to accept :include.  [Dan Peterson]
+
 * create_table rdoc: suggest :id => false for habtm join tables. [Zed Shaw]
 
 * PostgreSQL: return array fields as strings. #4664 [Robby Russell]

activerecord/lib/active_record/associations.rb

@@ -17,7 +17,6 @@ def initialize(owner_class_name, reflection)
 
   class HasManyThroughAssociationPolymorphicError < ActiveRecordError #:nodoc:
     def initialize(owner_class_name, reflection, source_reflection)
-      source_reflection = source_reflection
       super("Cannot have a has_many :through association '#{owner_class_name}##{reflection.name}' on the polymorphic object '#{source_reflection.class_name}##{source_reflection.name}'.")
     end
   end

activerecord/lib/active_record/associations/has_many_association.rb

@@ -48,6 +48,7 @@ def count(*args)
           options[:conditions] = options[:conditions].nil? ?
             @finder_sql :
             @finder_sql + " AND (#{sanitize_sql(options[:conditions])})"
+          options[:include] = @reflection.options[:include]
 
           @reflection.klass.count(column_name, options)
         end

activerecord/test/associations_go_eager_test.rb

@@ -356,4 +356,8 @@ def test_preconfigured_includes_with_has_many_and_habtm
     assert_equal 2, one.comments.size
     assert_equal 2, one.categories.size
   end
+  
+  def test_count_with_include
+    assert_equal 3, authors(:david).posts_with_comments.count(:conditions => "length(comments.body) > 15")
+  end
 end