Dynamic RavenDB Objects

Question

I have some code that looks something like this:

using (var session = DocumentStore.OpenSession()) { var dbItem = session.Load<dynamic>(item.Id); if (dbItem is DynamicJsonObject) { dbItem["PropertyName"] = "new value"; } session.SaveChanges(); } 

I cannot figure out how to update the dbItem properties.
Does anyone know what to do? I tried to access the property name as follows: dbItem.PropertyName I also tried casting for ExpandoObject, IDictionary and others. But nothing works.

Answer 1

As with Raven 2.5, support for dynamic objects seems to mostly relate to the read side, and it's not so easy to set properties for an existing object because Raven.Abstractions.Linq.DynamicJsonObject , which inherits DynamicObject , only implements read / call dynamic contract methods such as TryGetMember , TryGetIndex and TryInvokeMember . but none of the elements like TrySetMember .

However, if you added to IDynamicJsonObject , it provides access to an internal RavenJObject that you can manipulate.

This code example should illustrate how:

 using (var session = store.OpenSession()) { dynamic entity = new ExpandoObject(); entity.Id = "DynamicObjects/1"; entity.Hello = "World"; session.Store(entity); session.SaveChanges(); } using (var session = store.OpenSession()) { var json = session.Load<dynamic>("DynamicObjects/1") as IDynamicJsonObject; json.Inner["Name"] = "Lionel Ritchie"; json.Inner["Hello"] = "Is it me you're looking for?"; session.SaveChanges(); } using (var session = store.OpenSession()) { dynamic loadedAgain = session.Load<dynamic>("DynamicObjects/1"); Console.WriteLine("{0} says Hello, {1}", loadedAgain.Name, loadedAgain.Hello); // -> Lionel Ritchie says Hello, Is it me you're looking for?" }