Patch losing "$type" json meta data

[Lucas bode]

We are trying to store the class type meta data in our json using the following code example...

var settings = new Newtonsoft.Json.JsonSerializerSettings

{

    TypeNameHandling = Newtonsoft.Json.TypeNameHandling.Auto

};

This stores a "$type" property when saving the json to RavenDB. It works perfectly fine for all of the GET, POST, and PUT operations. However if you attempt to Patch an object in a document, the "$type" property is lost. Is this a bug?

[Oren Eini (Ayende Rahien)]

I'm not sure, how are you performing the patch?

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[Lucas bode]

Sorry if I didn't explain very well. I'm basically trying to store a list of objects that may be base classes or classes inheriting from the base class. When I pull those items out of the json I would like them to deserialize as the correct class. I attached a file with two tests, one that succeeds and one that fails that I would expect to succeed. I also attached two images that show that the $type property included in the json is being lost after the patch for some reason. 

Any help would be greatly appreciated. Thanks!

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[Grisha Kotler]

Do you need to replace the Classes object?

This patch works:

session.Advanced.Patch<ClassList, string>(classList.Id, x => x.Classes[0].Property1, "ABCDEFG");

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[Grisha Kotler]

You need to customize the JsonSerializer before DocumentStore.Initialize().

store.Conventions.CustomizeJsonSerializer = serializer => serializer.TypeNameHandling = TypeNameHandling.All;

Hibernating Rhinos Ltd  

Grisha Kotler l RavenDB Core Team Developer l Mobile: +972-54-586-8647

Office: +972-4-622-7811 l Fax: +972-153-4-622-7811

RavenDB paving the way to "Data Made Simple" http://ravendb.net/