Merge branch 'master' into nested_has_many_through

Conflicts:
	activerecord/CHANGELOG
	activerecord/lib/active_record/association_preload.rb
	activerecord/lib/active_record/associations.rb
	activerecord/test/schema/schema.rb

1 files changed, 30 insertions, 0 deletions

diff --git a/activerecord/lib/active_record/result.rb b/activerecord/lib/active_record/result.rb
new file mode 100644
index 0000000000..8deff1478f
--- /dev/null
+++ b/activerecord/lib/active_record/result.rb
@@ -0,0 +1,30 @@
+module ActiveRecord
+  ###
+  # This class encapsulates a Result returned from calling +exec+ on any
+  # database connection adapter.  For example:
+  #
+  #   x = ActiveRecord::Base.connection.exec('SELECT * FROM foo')
+  #   x # => #<ActiveRecord::Result:0xdeadbeef>
+  class Result
+    include Enumerable
+
+    attr_reader :columns, :rows
+
+    def initialize(columns, rows)
+      @columns   = columns
+      @rows      = rows
+      @hash_rows = nil
+    end
+
+    def each
+      hash_rows.each { |row| yield row }
+    end
+
+    private
+    def hash_rows
+      @hash_rows ||= @rows.map { |row|
+        ActiveSupport::OrderedHash[@columns.zip(row)]
+      }
+    end
+  end
+end