Add Arel::Nodes::Casted to dot visitor

Adds casted node to the dot visitor with outgoing edges to val and
attribute.

Fixes #419

2 files changed, 6 insertions, 0 deletions

diff --git a/lib/arel/visitors/dot.rb b/lib/arel/visitors/dot.rb
index ca8d2b0bd0..3faa126732 100644
--- a/lib/arel/visitors/dot.rb
+++ b/lib/arel/visitors/dot.rb
@@ -155,6 +155,11 @@ module Arel
         visit_edge o, "name"
       end
 
+      def visit_Arel_Nodes_Casted o
+        visit_edge o, 'val'
+        visit_edge o, 'attribute'
+      end
+
       def visit_Arel_Attribute o
         visit_edge o, "relation"
         visit_edge o, "name"
diff --git a/test/visitors/test_dot.rb b/test/visitors/test_dot.rb
index 4dc3c9c6c5..fa1c69e10d 100644
--- a/test/visitors/test_dot.rb
+++ b/test/visitors/test_dot.rb
@@ -64,6 +64,7 @@ module Arel
         Arel::Nodes::As,
         Arel::Nodes::DeleteStatement,
         Arel::Nodes::JoinSource,
+        Arel::Nodes::Casted,
       ].each do |klass|
         define_method("test_#{klass.name.gsub('::', '_')}") do
           binary = klass.new(:a, :b)