1 files changed, 8 insertions, 3 deletions
diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/quoting.rb b/activerecord/lib/active_record/connection_adapters/postgresql/quoting.rb
index be598f997f..d2e12417a6 100644
--- a/activerecord/lib/active_record/connection_adapters/postgresql/quoting.rb
+++ b/activerecord/lib/active_record/connection_adapters/postgresql/quoting.rb
@@ -29,7 +29,6 @@ module ActiveRecord
             end
           when String
             case sql_type
-            when 'xml'   then "xml '#{quote_string(value)}'"
             when /^bit/
               case value
               when /\A[01]*\Z/      then "B'#{value}'" # Bit-string notation
@@ -111,19 +110,25 @@ module ActiveRecord
         private
 
         def _quote(value)
-          if value.is_a?(Type::Binary::Data)
+          case value
+          when Type::Binary::Data
             "'#{escape_bytea(value.to_s)}'"
+          when OID::Xml::Data
+            "xml '#{quote_string(value.to_s)}'"
           else
             super
           end
         end
 
         def _type_cast(value)
-          if value.is_a?(Type::Binary::Data)
+          case value
+          when Type::Binary::Data
             # Return a bind param hash with format as binary.
             # See http://deveiate.org/code/pg/PGconn.html#method-i-exec_prepared-doc
             # for more information
             { value: value.to_s, format: 1 }
+          when OID::Xml::Data
+            value.to_s
           else
             super
           end