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AUTOCONFIG.md

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Automatic derivation for ToJson and FromJson

Rather than implementing ToJson and FromJson by hand, you can generate them automatically using

<sauce-code repo='kag0/ninny-json' lang='scala' file='ninny/test/src-2/io/github/kag0/ninny/userguide/SemiAuto.scala' lines='11:16'

Full-auto derivation for ToJson and FromJson

If you like you can even skip the declaration by mixing in AutoToJson or AutoFromJson, or importing io.github.kag0.ninny.Auto._.

<sauce-code repo='kag0/ninny-json' lang='scala' file='ninny/test/src-2/io/github/kag0/ninny/userguide/FullAuto.scala' lines='9:18'

Modifying field names with annotations

You can change the name of a field being read to/from JSON using the @JsonName annotation.

<sauce-code repo='kag0/ninny-json' lang='scala' file='ninny/test/src-2/io/github/kag0/ninny/userguide/Annotations.scala' lines='10:19'

Using default values for optional fields

If your case class has optional parameters then you can use their default values when a field is absent by importing the feature flag FromJsonAuto.useDefaults in the scope of the derivation for your FromJson.

<sauce-code repo='kag0/ninny-json' lang='scala' file='ninny/test/src-2/io/github/kag0/ninny/userguide/DefaultValues.scala' lines='9:17'