first test problem in velocypack parser for LocalDate

[jean safar]

Hi, 

Apologies in advance if I have missed a message on the topic (I did a search). 

I am running a first junit test on arango and I am getting an exception when getting a document with the key after I stored it. 

The message is: 

java.util.concurrent.ExecutionException: com.arangodb.ArangoDBException: com.arangodb.velocypack.exception.VPackParserException: java.lang.InstantiationException: java.time.LocalDate

The object stored is: 

{"id":"1","json":"json","actor":"toto","date":{"year":2021,"month":3,"day":23}}

The date field is of type LocalDate. ... 

it fails in the call: collection.getDocument(key, TestClass.class).get();

There is a setter and getting for that field. 

Thanks in advance-

[jean safar]

I forgot to mention that I have in my dependencies the volicypack jdk8 module... 

[Michele Rastelli]

LocalDate deserializer expects either a String or a Velocypack date: https://github.com/arangodb/java-velocypack-module-jdk8/blob/014c07cb736aea6b2b0fd99fbea51fa9efccf411/src/main/java/com/arangodb/velocypack/module/jdk8/internal/VPackJdk8Deserializers.java#L51-L54

You can use it as shown here: https://github.com/arangodb/java-velocypack-module-jdk8/blob/014c07cb736aea6b2b0fd99fbea51fa9efccf411/src/test/java/com/arangodb/velocypack/module/jdk8/VPackTimeTest.java#L207-L219

If you want anyways to deserialize your custom data structures, you can register a specific deserializer for it: https://www.arangodb.com/docs/stable/drivers/java-reference-serialization.html#custom-serializer

Best Regards,

Michele Rastelli

[jean safar]

 I was indeed just missing the registerModule directive!!
Thanks a lot for this...