Is it possible to deserialize a custom class from MessagePackObject #90

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1. yfakariya commented on Jul 5, 2015

   

   yfakariya

   on Jul 5, 2015

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   No, there are no Unpackers to support it. But it sounds good.
2. leonidumanskiy commented on Jul 6, 2015

   

   leonidumanskiy

   on Jul 6, 2015

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   I am asking because I have a basic "rpc-like" messaging system, and I want to serialize an object from one of the parameters. So it looks like this:
   {
   "command": "create_user",
   "parameters": {
   "hash": 1234,
   "user": {"user_name": "test_user", "password": "1234", "email": "test@test.com"}
   }
   }

   So I need to receive a command first, check what it is and than deserialize a User object from the second parameter. Is there any "right" way to to it?
3. yfakariya commented on Aug 16, 2015

   

   yfakariya

   on Aug 16, 2015

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   Sorry I missed the additional question. I recommend you to implement following class:

   public class Foo {
     public string Command { get; set; }
     public Dictionary<string, MessagePackObject> Parameters { get; set; }
   }

   and then, you check Parameters and use. I agree that it is not convinient at all, so I'll add ObjectUnpacker like API in future release.
4. yfakariya

   added

   enhancementRequires or request to feature enhancementRequires or request to feature enhancement

   on Aug 16, 2015
5. leonidumanskiy commented on Aug 16, 2015

   

   leonidumanskiy

   on Aug 16, 2015

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   @yfakariya that's what I have right now.
   And that's a problem I described in my first message - after taking MessagePackObject from the Parameters dictionary, I can't deserialize it into the class/object.
   Instead, I have to write

   var user = new User(Parameters["user_name"].AsString(), Parameters["password"].AsString(), Parameters["email"].AsString());

   which is really annoying. Especially when my class has about 20 different properties :)
   Hope to see an update asap!
6. TSnake41 commented on Aug 17, 2015

   

   TSnake41

   on Aug 17, 2015

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   Hi, I've found a solution if you know the type

   MessagePackObject obj;
   Type type;
   object output;
   using (MemoryStream stream = new MemoryStream())
   {
        using (Packer packer = Packer.Create(stream))
        {
               obj.PackToMessage(packer, new PackingOptions());
               stream.Position = 0;
               output = SerializationContext.CreateClassicContext().GetSerializer(type).Unpack(stream);
         }
   }

   You got an object with the right type.
7. yfakariya

   added this to the future milestone on Sep 22, 2016
8. yfakariya commented on Sep 23, 2016

   

   yfakariya

   on Sep 23, 2016

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   I will add helper extension methods in next release. It will be based on @TSnake41's idea. Thank you.
9. yfakariya

   added a commit that references this issue on Sep 24, 2016

   Add ToMessagePackObject FromMessagePackObject. #90

   ...

   4bb2a90
10. yfakariya

    modified the milestones: 0.9, future on Sep 24, 2016
11. yfakariya commented on Sep 26, 2017

    

    yfakariya

    on Sep 26, 2017

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    This was implemented in 0.9.
12. yfakariya

    closed this as completedon Sep 26, 2017