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How to avoid serializing None to null using Circe json serializer? I am not able to force this library to skip serializing fields which are None. Is it possible to achieve?

Travis Brown
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PawelN
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1 Answers1

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I found the solution. We can provide implicit variable of instance Printer with our configuration. https://github.com/circe/circe/blob/master/modules/core/shared/src/main/scala/io/circe/Printer.scala We can set dropNullKeys to null and everything is working like a charm.

PawelN
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  • `dropNullKeys` has now been changed to `dropNullValues` - see also here: [link](https://github.com/circe/circe/issues/585) – Stratos K Apr 08 '20 at 09:44