Implement message-pack methods on Data class (#1115)

Author: aidanharan

lib/active_record/connection_adapters/sqlserver/type/data.rb

@@ -36,6 +36,16 @@ def eql?(other)
             self.class == other.class && value == other.value
           end
           alias :== :eql?
+
+          def self.from_msgpack_ext(string)
+            type, value = string.chomp!("msgpack_ext").split(',')
+
+            Data.new(value, type.constantize)
+          end
+
+          def to_msgpack_ext
+            [type.class.to_s, value].join(',') + "msgpack_ext"
+          end
         end
       end
     end

test/cases/coerced_tests.rb

@@ -2586,6 +2586,19 @@ def thread_encrypting_and_decrypting(thread_label)
   end
 end
 
+# Need to use `install_unregistered_type_fallback` instead of `install_unregistered_type_error` so that message-pack
+# can read and write `ActiveRecord::ConnectionAdapters::SQLServer::Type::Data` objects.
+class ActiveRecordMessagePackTest < ActiveRecord::TestCase
+  private
+  def serializer
+    @serializer ||= ::MessagePack::Factory.new.tap do |factory|
+      ActiveRecord::MessagePack::Extensions.install(factory)
+      ActiveSupport::MessagePack::Extensions.install(factory)
+      ActiveSupport::MessagePack::Extensions.install_unregistered_type_fallback(factory)
+    end
+  end
+end
+
 # TODO: Need to uncoerce the 'SerializedAttributeTest' tests before releasing adapter for Rails 7.1
 class SerializedAttributeTest < ActiveRecord::TestCase
   coerce_all_tests!