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Kurro Lopez
Project Manager & Head of Interoperability at Salutic Soluciones, S.L.
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Question Kurro Lopez · Feb 8, 2024

Deserialize class from JSon with nodes null

#InterSystems IRIS #API #JSON

Hi all,

We have a class response inherited from %JSON.Adaptor with the following properties, also dependent classes:

 

Kurro.app.Msg.Search.Response

 

Kurro.app.Msg.Common.SearchCriteria

 

Kurro.app.Msg.Common.Availability

 

Kurro.app.Msg.Common.Acts

 

Kurro.app.Msg.Common.Parameters

Note: I've not written all nodes.

When we call to the API of the provider, we receive the following JSon

 

JSon response from provider

  
{
  "searchCriteria": [{
    "professionalNif": null,
    "specialtyCode": "SPCODE17",
    "acts": [
      {
        "actcode": "ACTCODE20",
        "actModality": null,
        "actPreparation": null,
        "actParameters": [
          {
            "parameterCode": "contraste",
            "parameterValue": "false"
          }
        ]
      }
    ]
  }],
  "availability": [
    {
      "acts": [
        {
          "actcode": "ACTCODE20",
          "actModality": "",
          "actPreparation": null,
          "actParameters": null
        }
      ],
      "slots": [
        {
          "day": "2024-02-15",
          "hours": [
            {
              "hour": "2024-02-15T18:20+01:00",
              "duration": 20
            },
            {
              "hour": "2024-02-15T18:40+01:00",
              "duration": 20
            },
            {
              "hour": "2024-02-15T19:00+01:00",
              "duration": 20
            },
            {
              "hour": "2024-02-15T19:20+01:00",
              "duration": 20
            },
            {
              "hour": "2024-02-15T19:40+01:00",
              "duration": 20
            }
          ]
        }
      ],
      "reasonNotAvailability": null
    }
  ]
}

 

 

And we use the following command to deserialize the response

set tHttpResponse = ##class(%Net.HttpResponse).%New()
set tSC = ..Adapter.SendFormDataArray(.tHttpResponse,verbo,tHttpRequest,,,tUrl)
set content = ""while (tHttpResponse.Data.AtEnd = 0) { 
   set content = content_tHttpResponse.Data.Read() 
}
do pResponse.%JSONImport(content)

As you can see, the provider has returned a null value in the availability.acts.actParameters node, instead of an array of data, and the deserialize of the JSon raises an error.

How we have to define our class to prevent that type of error? I mean, if the response is a null value, ignore this error and continue with the rest of the content.

Thanks in advance.

Product version: IRIS 2021.1
$ZV: IRIS for Windows (x86-64) 2021.1.3 (Build 389U) Wed Feb 15 2023 14:50:06 EST
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Comments

Vitaliy Serdtsev · Feb 8, 2024

I'm getting an error:

ERROR #9406: Unexpected format for value of field, searchCriteria, using class base mapping
After fixing the JSON, the error disappeared:
<FONT COLOR="#ff00ff">{</FONT><FONT COLOR="#008000">"searchCriteria"</FONT><FONT COLOR="#808080">: </FONT><FONT COLOR="#ff00ff">{..}}</FONT> ==> <FONT COLOR="#ff00ff">{</FONT><FONT COLOR="#008000">"searchCriteria"</FONT><FONT COLOR="#808080">: </FONT><FONT COLOR="#ff00ff">[{..}]}</FONT>
Also note the mapping between the fields professionalId/professionalNif and preparation/actPreparation
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Kurro Lopez  Feb 8, 2024 to Vitaliy Serdtsev

Sorry, it's a mistake. Indeed, I've forgotten write the [ ], but still the error.

I've fixed the JSon in the post.

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