I am attempting to perform serialization on an anonymous object using the SerializerBu

Exception serializing an anonymous object about dotnet-avro HOT 3 CLOSED

pedrompc commented on August 25, 2024

Exception serializing an anonymous object

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Comments (3)

dstelljes commented on August 25, 2024

Thanks for the report; this is a case that the library should support but presently does not. We’ll investigate it as a bug and provide updates here.

As a workaround, you should be able to accomplish this with dynamic objects:

dynamic key = new ExpandoObject();
key.Key = "key1";
keySerializer.Serialize(key, keySerializationContext);

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pedrompc commented on August 25, 2024

I have tried your example, but I'm still getting the same error:

Code:

using var serializerBuilder = new SchemaRegistrySerializerBuilder(schemaRegistry);
var keySerializationContext = new SerializationContext(MessageComponentType.Key, request.TopicTarget);
var keySerializer = await serializerBuilder.Build<ExpandoObject>(9);

dynamic key = new ExpandoObject();
key.Key = "key1";
var keybytes = keySerializer.Serialize(key, keySerializationContext);

Error:

Microsoft.CSharp.RuntimeBinder.RuntimeBinderException: Cannot perform runtime binding on a null reference
   at CallSite.Target(Closure , CallSite , ExpandoObject )
   at System.Dynamic.UpdateDelegates.UpdateAndExecute1[T0,TRet](CallSite site, T0 arg0)
   at DefaultKeyEntity serializer(Closure , ExpandoObject , BinaryWriter )
   at Chr.Avro.Confluent.DelegateSerializer`1.Serialize(T data, SerializationContext context)

Either way, thank you for the help and I'll keep my eye on updates.

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dstelljes commented on August 25, 2024

Apologies for the wait on this. The issue turned out to be two separate bugs, one in how the Schema Registry serializer was being built and another in how properties were being accessed. We'll release both fixes shortly with 9.4.1.

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