1 files changed, 35 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/oid/json.rb b/activerecord/lib/active_record/connection_adapters/postgresql/oid/json.rb
new file mode 100644
index 0000000000..e12ddd9901
--- /dev/null
+++ b/activerecord/lib/active_record/connection_adapters/postgresql/oid/json.rb
@@ -0,0 +1,35 @@
+module ActiveRecord
+  module ConnectionAdapters
+    module PostgreSQL
+      module OID # :nodoc:
+        class Json < Type::Value # :nodoc:
+          include Type::Mutable
+
+          def type
+            :json
+          end
+
+          def type_cast_from_database(value)
+            if value.is_a?(::String)
+              ::ActiveSupport::JSON.decode(value)
+            else
+              super
+            end
+          end
+
+          def type_cast_for_database(value)
+            if value.is_a?(::Array) || value.is_a?(::Hash)
+              ::ActiveSupport::JSON.encode(value)
+            else
+              super
+            end
+          end
+
+          def accessor
+            ActiveRecord::Store::StringKeyedHashAccessor
+          end
+        end
+      end
+    end
+  end
+end