rails/arel — pull request #96 by terralab (2012-01-20 15:16:10+00:00)
Title: BUGFIX: uninitialized constant Arel::Nodes::Visitors::DepthFirst

while using activerecord-sqlserver-adapter 3.1.5 with Rails 3.1 with Arel 2.2.1 we encountered the error
uninitialized constant Arel::Nodes::Visitors::DepthFirst
apparently Arel was trying to call a relative namespace with
Visitors::DepthFirst.new(block).accept self
we fixed this by making it call an absolute namespace with
::Arel::Visitors::DepthFirst.new(block).accept self