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Repo info
Andrey Tararaksin

Hey guys, any ideas why wouldn't this work? This is just a minimal test of ScalarAlias (and custom scalars in general):

  case class Foo(s: String)
  case class FooWrapper(foo: Foo)
  implicit val FooType = ScalarAlias[Foo, String](StringType, _.s, s => Right(Foo(s)))
  val FooWrapperInputType = deriveInputObjectType[FooWrapper]()
  val FooWrapperArg = Argument("data", FooWrapperInputType)

  val Query = ObjectType(
    fields[GraphQLContext, Unit](
      Field("testFoo", StringType, arguments = FooWrapperArg::Nil, resolve = c => "ok")

Sending this query

query { testFoo(data: {foo: "test"}) }

results in

  "data": null,
  "errors": [
      "message": "Argument 'data' has invalid value: Attempt to decode value on failed cursor: DownField(s),DownField(foo) (line 28, column 17):\n  testFoo(data: {foo: \"test\"})\n                ^",
      "path": [
      "locations": [
          "line": 28,
          "column": 17
And interestingly, this happens only if I use Foo inside FooWrapper: if the argument contains Foo directly instead of FooWrapper, everything works (the query than would be query { testFoo(data: "test") })
Andrey Tararaksin
Answer to myself: I need to define a FormInput[FooWrapper] in scope. The one derived automatically by circe-support has no notion of my Foo scalar, so it treats it as a normal case class. So it expects the foo field to be an object with s: String field, hence the error message.
Would be cool though if there still was some way to derive FormInput for such cases automatically.

Hello, I'm debugging this sangria-graphql/sangria#465 where sangria fails to resolve SequenceLeafAction. I'm having a hard time understanding how the resolveActionsPar function works.

I'm especially interested in the purpose of resolveDctx. Is there any documentation regarding this or any one who might be able to help me with this?

Miguel Carmona
I am trying to use my controller programatically internally in the same API so I need ot provide a Document. Is there a simple way of creatring documents from the schema query definition and pass the arguments the funcion needs? thanks in advance
Miguel Carmona
well, does anyone know if there is an easy way of filling this just passing the arguments the query needs?
val docQ = Document(definitions = Vector(
fieldsByName gives me the query I would like to execute but how to extract it and pass the proper arguments the object needs ?
Patrick Skjennum

I'm using sangria with circe, and bundling the serialization boilerplate in the companion object like so:

case class Foo(bar: Int)
object Foo {
  implicit val Type: ObjectType[GraphQLContext, Foo] = deriveObjectType[GraphQLContext, Foo]()
  implicit val InputType: InputObjectType[Foo]       = deriveInputObjectType[Foo]()
  implicit val Dec: Decoder[Foo]                     = deriveDecoder[Foo]

is it possible in any way to store this boilerplate in a superclass such that I can just extend Foo and get the extra stuff automatically?

I figured it might be possible with classTags (to get around type erasure) but no avail:

case class Foo(bar: Int) extends Bar[Foo]
class Bar[T : ClassTag] ()
object Bar {
  implicit val Type: ObjectType[GraphQLContext, T] = deriveObjectType[GraphQLContext, T]()
  implicit val InputType: InputObjectType[T]       = deriveInputObjectType[T]()
  implicit val Dec: Decoder[T]                     = deriveDecoder[T]
Hey guys,
What is the best way to resolve a query into a external http call to a Rest api?
Yann Simon
Hi community, I'd need some help to open and review pull requests on the temporary organization: https://github.com/sangria-graphql-org. For example, for each project, we'd need one PR to update sbt-coverage and the scala 2.13 version at the same time.
Sebastian Bruckner


Could anyone PTAL at my PR? sangria-graphql-org/sangria-relay#10

Would it be possible to get a hotfix release for this? It is a blocker for us to go live.

Thx a lot!!! ❤️

Yann Simon
Hi, I'd the view of the community about the PR "Support for repeatable directives":
I don't have the knowledge to decide if it should be merged, completely or partially.
If anyone could give any opinions here...
After that, I think we can have a v2.0.0-M2 release.
There's in the pipe an exciting feature allowing better performances: sangria-graphql-org/sangria#12
Sebastian Bruckner


Thanks to everyone who helps to continue this project!

Binh Nguyen
@yanns I saw 2.0.0-M2 tag on Github but no artifact on Maven yet. Is it intentional?
Binh Nguyen
I see, thanks for the update. I will try to see if there's a way to migrate the build to sbt-ci-releasehttps://github.com/olafurpg/sbt-ci-release
Yann Simon
Travis just fixed the issue
Yann Simon
Please be aware that we might have an issue in the 2.0.0-M2 release: https://github.com/sangria-graphql-org/sangria/pull/10#issuecomment-571471876
Yann Simon
I release the 2.0.0-M3 version that reverts the change causing the issue in 2.0.0-M2: https://github.com/sangria-graphql-org/sangria/releases/tag/v2.0.0-M3
Ellen Shapiro
Hi! I was wondering if there's a new place that this got deployed: http://toolbox.sangria-graphql.org/ - looks like that Heroku account got deleted.
Darshak Mehta
@yanns Did you find any answer for deprecationReason for InputField?
Question: what is the accepted way to automatically test endpoints/resolvers?
Yann Simon
@darshakmehta sorry, I don't get the context? If it's possible to deprecate an input field maybe?
Miguel Carmona
hi! can anyone shade some light on it?
Option[Seq[Product with Serializable]] is invalid type for the resulting GraphQL type Option[Seq[Option[Any]]]
It works when I just return an UnionType and there is a deferOpt inside like this OptionType(msearchResultType)
lazy val msearchResultType = UnionType("MSearchResultType", types = List(targetImp, drugImp, diseaseImp))
but the problem shows when I need to resolve a list of them as OptionType(ListType(OptionType(msearchResultType)))
Miguel Carmona
did anyone face that problem before when resolving a list of UnionType elements? any code I could try? The example here works because there is no any fetcher implicated https://github.com/sangria-graphql/sangria/blob/270af67f3ab457885638ff74bb184940385efee7/src/test/scala/sangria/execution/UnionInterfaceSpec.scala#L36
and then glueing all this together
Field("combined", OptionType(ListType(OptionType(msearchResultType))),
        description = Some("Return combined"),
        resolve = ctx => {
          Some(ctx.value.combined.map(el => {
            el.entity match {
              case "target" => targetsFetcher.deferOpt(el.id)
              case "disease" => diseasesFetcher.deferOpt(el.id)
              case "drug" => drugsFetcher.deferOpt(el.id)
              case _ => None
Miguel Carmona
it apparently works if I return a wrapper object and put the defer match inside so it won't be mapping a list to defer but each object independently
Kyle H
I created a pull request sangria-graphql/sangria#472, but it looks like the travis-ci build failed. It doesn't look like it has anything to do with my change specifically, and a bunch of builds have failed with the same (some sort of failure to install JDK8 on the travis machine). Is there a way to fix this/re-run the build?
Yann Simon
@khoberg Please use https://github.com/sangria-graphql-org for the moment
Wesley Schleumer de Góes

Hey! I'm testing 2.0 with Scala 2.13 and i'm facing the following error:

ambiguous reference to overloaded definition,
both method apply in object PossibleObject of type [Ctx, Abstract](objectType: sangria.schema.ObjectType[Ctx, _])sangria.schema.PossibleObject[Ctx,Abstract]
and  method apply in object PossibleObject of type [Ctx, Abstract, Concrete](obj: sangria.schema.ObjectType[Ctx,Concrete])(implicit ev: sangria.schema.PossibleType[Abstract,Concrete])sangria.schema.PossibleObject[Ctx,Abstract]
match argument types (sangria.schema.ObjectType[microsistec.std.transport.generic.graphql.BaseContext,microsistec.sci.notifications.types.InvalidResource]) and expected result type sangria.schema.PossibleObject[_, _]
Error occurred in an application involving default arguments.

With the following code:

        name = "resources",
        fieldType = ListType(resourceInterface.Type),
        description = ...,
        possibleTypes = List(
        resolve = ...

The code itself used to work on 1.4.2 with Scala 2.12, i don't if it's a known bug or anything else

Wesley Schleumer de Góes
I can get over it by using the PossibleObject constructor new PossibleObject(...) but i think it's kinda java-ish
Travis Brown
@schleumer What you're seeing is because of a change that was necessary to work around a Scala 2.13 bug: scala/bug#11662
IIRC I thought the fix would support the same usage as 1.4.
If you have a complete minimisation I'd be happy to take a look.
Wesley Schleumer de Góes
I think i found the root of the problem whilst i was making the minimisation, the issue looks to be related with the Ctx infer, when i use Unit as Ctx everything works good, buuuuut, when i use a custom Ctx everything just blow, i will make two examples with that information, soon i will send it here
Wesley Schleumer de Góes
Has there been any work done regarding implementing the federation spec in sangria?
Kyle H
Any way I can get sangria-graphql-org/sangria#36 merged and possibly published?
Yann Simon
@khoberg thx for the reminder. It's merged now.
I was waiting for https://github.com/sangria-graphql-org/sangria/pull/10#issuecomment-572471642 for a new release. @kirach any progress of this?

Hello, I'm working on a Many-to-Many relation with Sangria and Slick.
I have 3 objects: Role, Permission and RolePermission (a mapping table)

case class Role(id: Long, name: String)
case class Permission(id: Long, name: String)
case class RolePermission(id: Long, roleId: Long, permissionId: Long)

So far, I figured out how to define the relation:

val permissionsByRoleId = Relation[Permission, (RolePermission, Permission), Long]("permissionsByRoleId", tmp ⇒ Seq(tmp._1.roleId), _._2)

but still working on the fetcher and how to add the right field to Role Schema, so that I could retrieve the Role's permissions passing by the intermediate table.

Any help ?
a simple example would help.

A good person send me this step-per-step guide, on how to write many-to-many relations, I'll leave the link here:
Wesley Schleumer de Góes
Alexander Kruzhkov
Hello guys! I've been looking for any news about ability of replacement scala's Future with IO (cats-effect) or smth else (maybe ZIO), but haven't found any info yet. Is there any plan on that?
Mariusz Nosiński
@schleumer AFAIR I did, do you have any issues?