Aspnet core: How do you serialize a collection of Practitioners?

[jamescanady]

Hello,
I have ran into an issue where the MVC JsonOptions is being ignored when serializing during a MVC action response.
We're trying to return a Practitioner (other Fhir Objects) back as a response from MVC api requests.

builder.Services.AddControllers()
  .AddJsonOptions(options =>
  {
      options.JsonSerializerOptions.ForFhir(typeof(Hl7.Fhir.Model.Practitioner).Assembly).Compact();
  })

public IActionResult Get()
   {
       //var provider = new Data.Models.sProvider.Provider();
       //var practitioner = new Data.Models.Fhir.SymplrPractitioner(provider);
       var practitioner = new Hl7.Fhir.Model.Practitioner();
       practitioner.Name.Add(new () {
           Given = new [] { "Sally" },
           Family = "Smith",
           Period = new () {
               Start = new DateTime(2002, 01, 01).ToString()
           }
       });
       practitioner.Identifier.Add(new () {
           Use = Identifier.IdentifierUse.Official,
           Period = new () {
               End = new DateTime(2032, 01, 01).ToString()
           }
       });
       var practitioners = new [] { practitioner };
       return Ok(practitioners);
   }

The output we're getting isn't serialized properly, its as if the jsonOptions are being ignored for this request.

[
	{
		"identifier": [
			{
				"use": {
					"value": "official"
				},
				"period": {
					"end": {
						"value": "1/1/2032 12:00:00 AM"
					}
				}
			}
		],
		"name": [
			{
				"family": {
					"value": "Smith"
				},
				"given": [
					{
						"value": "Sally"
					}
				],
				"period": {
					"start": {
						"value": "1/1/2002 12:00:00 AM"
					}
				}
			}
		]
	}
]

are there any suggestions on how to wire up the serialization options to allow for the correct response from the action?

[brianpos]

I haven't tried this new style format, but you could take a look at the facade project I wrote that helps with writing servers using this library
https://github.com/brianpos/fhir-net-web-api which is also on nuget
Some usage notes are here
https://brianpos.com/2022/04/19/create-your-own-net-fhir-server-fast/

[ghost]

@jamescanady - In your code, why do you pass typeof(Hl7.Fhir.Model.Practitioner).Assembly ? Instead, just .ForFhir().