Github user Fokko commented on the issue:
https://github.com/apache/spark/pull/21596
@gatorsmile Are you completely sure about that? The Spark REST API `null`
values are always omitted. Where is this behaviour different?
`mapper.setSerializationInclusion(Include.NON_ABSENT)`:
```
scala> println(mapper.writeValueAsString(Map("abc" -> null)))
{}
```
`mapper.setSerializationInclusion(Include.ALWAYS)`:
```
scala> println(mapper.writeValueAsString(Map("abc" -> null)))
{"abc":null}
```
If you're doing proper Scala and try to avoid the `null`'s in general, with
`None` in combination with
`mapper.setSerializationInclusion(Include.NON_ABSENT)` you'll get:
```
scala> println(mapper.writeValueAsString(Map("abc" -> None)))
{"abc":null}
```
---
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
