From 2105803010195a13a119c561ce198685de2da51b Mon Sep 17 00:00:00 2001
From: Jan De Poorter <jan@defv.be>
Date: Wed, 23 Jul 2008 12:50:16 +0200
Subject: [PATCH] Add any? to NamedScope so it doesn't load the whole dataset but does a count

---
 activerecord/lib/active_record/named_scope.rb |   10 +++++++++-
 activerecord/test/cases/named_scope_test.rb   |   12 ++++++++++++
 2 files changed, 21 insertions(+), 1 deletions(-)

diff --git a/activerecord/lib/active_record/named_scope.rb b/activerecord/lib/active_record/named_scope.rb
index 080e3d0..d5a1c5f 100644
--- a/activerecord/lib/active_record/named_scope.rb
+++ b/activerecord/lib/active_record/named_scope.rb
@@ -103,7 +103,7 @@ module ActiveRecord
       attr_reader :proxy_scope, :proxy_options
 
       [].methods.each do |m|
-        unless m =~ /(^__|^nil\?|^send|^object_id$|class|extend|find|count|sum|average|maximum|minimum|paginate|first|last|empty?)/
+        unless m =~ /(^__|^nil\?|^send|^object_id$|class|extend|find|count|sum|average|maximum|minimum|paginate|first|last|empty?|any?)/
           delegate m, :to => :proxy_found
         end
       end
@@ -140,6 +140,14 @@ module ActiveRecord
         @found ? @found.empty? : count.zero?
       end
 
+      def any?
+        if block_given?
+          proxy_found.any? { |*block_args| yield(*block_args) }
+        else
+          !empty?
+        end
+      end
+
       protected
       def proxy_found
         @found || load_found
diff --git a/activerecord/test/cases/named_scope_test.rb b/activerecord/test/cases/named_scope_test.rb
index 0c1eb23..87d770e 100644
--- a/activerecord/test/cases/named_scope_test.rb
+++ b/activerecord/test/cases/named_scope_test.rb
@@ -183,6 +183,18 @@ class NamedScopeTest < ActiveRecord::TestCase
       topics.empty?  # use loaded (no query)
     end
   end
+  
+  def test_any_should_not_load_results
+    topics = Topic.base
+    topics.expects(:empty?).returns(true)
+    assert !topics.any?
+  end
+
+  def test_any_should_call_proxy_found_if_using_a_block
+    topics = Topic.base
+    topics.expects(:empty?).never
+    topics.any? { true }
+  end
 
   def test_should_build_with_proxy_options
     topic = Topic.approved.build({})
-- 
1.5.6.rc0.29.g3beb5