Allow a type caster to be given to the `Arel::Table` object

This will allow most consuming code to avoid the deprecation introduced
in 008445d6fd5f825d9b445ac75a7be67f0f7ab52c. The only code which will be
affected is code that is building the `Arel::Table` object manually,
rather than calling `arel_table` on an Active Record class. Hopefully
this case will be rare enough that we don't need to introduce any
additional APIs to work around it.

1 files changed, 8 insertions, 0 deletions

diff --git a/lib/arel/attributes/attribute.rb b/lib/arel/attributes/attribute.rb
index 0906fa4f1d..cda5a5a3db 100644
--- a/lib/arel/attributes/attribute.rb
+++ b/lib/arel/attributes/attribute.rb
@@ -12,6 +12,14 @@ module Arel
       def lower
         relation.lower self
       end
+
+      def type_cast_for_database(value)
+        relation.type_cast_for_database(name, value)
+      end
+
+      def able_to_type_cast?
+        relation.able_to_type_cast?
+      end
     end
 
     class String    < Attribute; end