Error in JSON serialization of Patient object in Spring Boot application

[Siddhartha Gupta]

Hi,

Whenever I am trying to use HAPI FHIR structures in my spring boot application, while getting the response I getting the following error:

{

    "timestamp": 1522900137233,

    "status": 500,

    "error": "Internal Server Error",

    "exception": "org.springframework.http.converter.HttpMessageNotWritableException",

    "message": "Could not write JSON: InstantType contains null value; nested exception is com.fasterxml.jackson.databind.JsonMappingException: InstantType contains null value (through reference chain: org.hl7.fhir.dstu3.model.Patient[\"meta\"]->org.hl7.fhir.dstu3.model.Meta[\"lastUpdatedElement\"]->org.hl7.fhir.dstu3.model.InstantType[\"today\"])",

    "path": "/hello1"

}

There seems to be a HttpMessageNotWritableException and JsonMappingException. It is unable to serialize and parse the json. 

Is there any workaround on this ? I am NOT useing the HAPI FHIR server. It is a spring boot app.

Thanks,

Siddhartha

[James Agnew]

I would recommend using the HAPI FHIR server for this, as Spring Boot does not natively understand how to parse and serialize FHIR. You can find an example of how to do this here: https://github.com/jamesagnew/hapi-fhir/tree/master/hapi-fhir-spring-boot/hapi-fhir-spring-boot-samples/hapi-fhir-spring-boot-sample-server-jersey

Cheers,

Jams

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