1 files changed, 50 insertions, 0 deletions
diff --git a/activemodel/lib/active_model/type/binary.rb b/activemodel/lib/active_model/type/binary.rb
new file mode 100644
index 0000000000..a0cc45b4c3
--- /dev/null
+++ b/activemodel/lib/active_model/type/binary.rb
@@ -0,0 +1,50 @@
+module ActiveModel
+  module Type
+    class Binary < Value # :nodoc:
+      def type
+        :binary
+      end
+
+      def binary?
+        true
+      end
+
+      def cast(value)
+        if value.is_a?(Data)
+          value.to_s
+        else
+          super
+        end
+      end
+
+      def serialize(value)
+        return if value.nil?
+        Data.new(super)
+      end
+
+      def changed_in_place?(raw_old_value, value)
+        old_value = deserialize(raw_old_value)
+        old_value != value
+      end
+
+      class Data # :nodoc:
+        def initialize(value)
+          @value = value.to_s
+        end
+
+        def to_s
+          @value
+        end
+        alias_method :to_str, :to_s
+
+        def hex
+          @value.unpack('H*')[0]
+        end
+
+        def ==(other)
+          other == to_s || super
+        end
+      end
+    end
+  end
+end