mORMot Open Source

ertank

Member

Registered: 2016-03-16

Posts: 184

Possibility to skip some values as JSON serialization

Hello,

I have following record definition with Delphi 12.3 and mORMot2.

  TProductForUploadAttribute = packed record
    attributeId: Int64;
    attributeValueId: Variant;
    customAttributeValue: Variant;
  end;
  TProductForUpload = packed record
    attributes: TArray<TProductForUploadAttribute>;
  end;

The "customAttributeValue" is required optional like below by the 3rd party web service I am using.

   "attributes": [
        {
          "attributeId": 1,
          "attributeValueId": 7165
        },
        {
          "attributeId": 3,
          "attributeValueId": null,
          "customAttributeValue": "AÇIK TABA SÜET"
        }
   ]

When I serialize the record "customAttributeValue" is included in all array items. Is there a way to automatically exclude it like above? Maybe when it's value is Unassigned?

Thanks & Regards,
Ertan

tbo

Member

Registered: 2015-04-20

Posts: 375

Re: Possibility to skip some values as JSON serialization

1. Check TTextWriterWriteObjectOption

2. Permanent

   initialization
     Rtti.ByTypeInfo[TypeInfo(TProductForUploadAttribute )].Props.NameChange('customAttributeValue', '');

3. With Custom-Serializer in this example.

With best regards
Thomas

lfyey121

Member

From: china

Registered: 2022-08-25

Posts: 77

Re: Possibility to skip some values as JSON serialization

TTextWriterWriteObjectOption-->  [woDontStoreVoid]