v2.8.0

Release Notes

This release brings a long-awaited feature: @oneOf inputs, based on this RFC which is almost finalized and already implemented in several libraries in other languages. This allows you to use ADTs as input parameters:

@GQLOneOfInput
enum Foo {
  case FooString(stringValue: String)
  case FooInt(intValue: Int)
}
case class FooArgs(input: Foo)
case class Queries(foo: FooArgs => String)

This will generate the following schema, and the validation will verify that only one of those fields is provided in incoming queries.

input FooInput @oneOf {
  stringValue: String
  intValue: Int
}

type Queries {
  foo(input: FooInput!): String!
}

This release also includes a few breaking changes that should impact a very low amount of users, but here they are just in case:

• Removed code that was deprecated for a long time
• Removed unnecessary type parameter on Validator.prepare
• Removed convertHttpStreamingEndpoint/convertHttpEndpointToFuture
• Migrated the (deprecated) zio-http adapter to use the (recommended) quick adapter, which changes the syntax a bit (you have to pass the interpreter and config directly to the method rather than using the HttpInterpreter / WebSocketInterpreter). If you had RequestInterceptor before, you can use zio-http Middleware instead.
• Removed the dependency on zio-prelude, so if you relied on Caliban for the transitive dependency, you will have to depend on it explicitly.
• Some methods (such as GraphQL#interpreter) that returned a ZIO now return an Exit, which is a subtype of ZIO that you can convert to an Either or Option without needing to run the ZIO

New features

• Added support for @oneOf inputs for both server and client by @kyri-petrou in #1846 #2294
• Made it easier to use tapir with impure effects such as Ox by @ghostdogpr in #2282
• Added an Scala3-only annotation to derive all case class methods as graphql fields by @kyri-petrou in #2306
• Added a transformer that excludes fields / inputs based on directives by @kyri-petrou in #2293

Bug fixes

• Fixed codegen path on Windows by @OlegYch in #2304
• Fixed derivation of case objects / parameterless case classes that contain @GQLField methods by @kyri-petrou in #2305

Performance improvements

• Changed caliban-zio-http to depend on caliban-quick by @kyri-petrou in #2287
• Utilized ZIO / ZQuery eager constructors and accessors wherever possible by @kyri-petrou in #2297
• Used Either instead of ZPure in Validator / VariableCoercer by @kyri-petrou in #2310
• Improved introspection by @kyri-petrou in #2290
• Returned Exit for methods in Pagination by @kyri-petrou in #2298
• Used Either instead of ZIO for methods that don't require it by @kyri-petrou in #2292
• Avoided repeating validations on Fragments by @kyri-petrou in #2315

Code cleanup

• Removed deprecated methods from zio-json update by @kyri-petrou in #2286
• Deleted deprecated rendering by @paulpdaniels in #2266
• Removed unnecessary param from Validator.prepare by @kyri-petrou in #2291
• Removed dependency on zio-prelude by @kyri-petrou in #2314