Greg Methvin

**(Moved from playframework/playframework#6756)** Actually reading optional fields / objects with Json Transformers is possible, but it is currently missing in our [documentation](https://www.playframework.com/documentation/2.5.x/ScalaJsonTransformers), so we should add something like that to...

Customization for Jackson ObjectMapper

2

**(Moved from playframework/playframework#6333)** `Json.parse` and `Json.stringify` currently don't allow any customization for how values are converted to and from `JsValue`. In some cases one may want to do that. For...

**(Moved from playframework/playframework#5863)** ### Actual Behavior ``` scala> import play.api.libs.json._ import play.api.libs.json._ scala> (__ \ "foo").readNullable[String] res0: play.api.libs.json.Reads[Option[String]] = play.api.libs.json.Reads$$anon$8@4a733e24 scala> res0.reads(Json.obj()) res1: play.api.libs.json.JsResult[Option[String]] = JsSuccess(None,) scala> res0.reads(JsString("hello")) res2: play.api.libs.json.JsResult[Option[String]]...

Monoid[JsObject] does not satisfy associative law

2

**(Moved from playframework/playframework#4651)** ``` Welcome to Scala version 2.11.6 (Java HotSpot(TM) 64-Bit Server VM, Java 1.8.0_45). Type in expressions to have them evaluated. Type :help for more information. scala> import...

**(Moved from playframework/playframework#3880)** There are a number of interesting dataformats available for jackson, including: - [MsgPack](https://github.com/msgpack/msgpack-java/tree/v07-develop/msgpack-jackson) - [Yaml](https://github.com/FasterXML/jackson-dataformat-yaml) - [Smile](https://github.com/FasterXML/jackson-dataformat-smile) This probably involves transforming `JacksonJson` into a class that accepts...

Implement support for > 22 field case classes in macros

7

**(Moved from playframework/playframework#3174)** In Scala 2.11, a case class can have more than 22 fields. We could modify our existing macros to support these. Here's approximately how to do it:...

**(Moved from playframework/playframework#952)** OWrites defines an implicit ContravariantFunctor[OWrites] it should be a ContravariantFunctor[Writes] ### use case lets have ``` scala case class PoneyFriend(friends: List[String]) object PoneyFriend { implicit def poneyFriendWrites:...

Should store headers and query params as a list instead of a map

1

Storing as a map causes re-ordering of query params which might be undesirable in some cases. It would be fine to use a `Seq[(String, String)]`. See playframework/playframework#6884, specifically https://github.com/playframework/playframework/pull/6884#issuecomment-272674376

Many threads blocked in LRUMap (with `ScalaObjectMapper`) -- increase type cache size?

15

(NOTE: moved from `jackson-databind` on 11-Sep-2019 by @cowtowncoder ) Version: Jackson 2.8.11, probably also 2.9.7 We have an API server that receives requests then makes ElasticSearch requests using the elastic4s...

Macwire does not consider outer trait members to be candidates for wiring

3

If I have a trait with an inner trait like this: ```scala trait FooComponents { lazy val fooService: FooService = wire[FooService] trait FooRequestScopedComponents { def request: RequestHeader def fooController: FooController...