Disable feature by default with an overridable flag

core/src/main/scala-2/caliban/schema/SchemaDerivation.scala

@@ -11,6 +11,14 @@ import scala.language.experimental.macros
 
 trait CommonSchemaDerivation[R] {
 
+  /**
+   * Enables the `SemanticNonNull` feature on derivation.
+   * It is currently disabled by default since it is not yet stable.
+   *
+   * Override this method and return `true` to enable the feature.
+   */
+  def enableSemanticNonNull: Boolean = false
+
   /**
    * Default naming logic for input types.
    * This is needed to avoid a name clash between a type used as an input and the same type used as an output.
@@ -96,7 +104,8 @@ trait CommonSchemaDerivation[R] {
                 p.annotations.collectFirst { case GQLDeprecated(reason) => reason },
                 Option(
                   p.annotations.collect { case GQLDirective(dir) => dir }.toList ++ {
-                    if (isOptional && p.typeclass.semanticNonNull) Some(Directive("semanticNonNull"))
+                    if (enableSemanticNonNull && isOptional && p.typeclass.semanticNonNull)
+                      Some(Directive("semanticNonNull"))
                     else None
                   }
                 ).filter(_.nonEmpty)

core/src/main/scala-3/caliban/schema/DerivationUtils.scala

@@ -120,7 +120,8 @@ private object DerivationUtils {
   def mkObject[R](
     annotations: List[Any],
     fields: List[(String, List[Any], Schema[R, Any])],
-    info: TypeInfo
+    info: TypeInfo,
+    enableSemanticNonNull: Boolean
   )(isInput: Boolean, isSubscription: Boolean): __Type = makeObject(
     Some(getName(annotations, info)),
     getDescription(annotations),
@@ -142,7 +143,7 @@ private object DerivationUtils {
         deprecatedReason,
         Option(
           getDirectives(fieldAnnotations) ++ {
-            if (isOptional && schema.semanticNonNull) Some(Directive("semanticNonNull"))
+            if (enableSemanticNonNull && isOptional && schema.semanticNonNull) Some(Directive("semanticNonNull"))
             else None
           }
         ).filter(_.nonEmpty)

core/src/main/scala-3/caliban/schema/ObjectSchema.scala

@@ -12,7 +12,8 @@ final private class ObjectSchema[R, A](
   _methodFields: => List[(String, List[Any], Schema[R, ?])],
   info: TypeInfo,
   anns: List[Any],
-  paramAnnotations: Map[String, List[Any]]
+  paramAnnotations: Map[String, List[Any]],
+  enableSemanticNonNull: Boolean
 )(using ct: ClassTag[A])
     extends Schema[R, A] {
 
@@ -48,7 +49,7 @@ final private class ObjectSchema[R, A](
   def toType(isInput: Boolean, isSubscription: Boolean): __Type = {
     val _ = resolver // Init the lazy val
     if (isInput) mkInputObject[R](anns, fields.map(_._1), info)(isInput, isSubscription)
-    else mkObject[R](anns, fields.map(_._1), info)(isInput, isSubscription)
+    else mkObject[R](anns, fields.map(_._1), info, enableSemanticNonNull)(isInput, isSubscription)
   }
 
   def resolve(value: A): Step[R] = resolver.resolve(value)

core/src/main/scala-3/caliban/schema/SchemaDerivation.scala

@@ -23,6 +23,14 @@ object PrintDerived {
 trait CommonSchemaDerivation {
   export DerivationUtils.customizeInputTypeName
 
+  /**
+   * Enables the `SemanticNonNull` feature on derivation.
+   * It is currently disabled by default since it is not yet stable.
+   *
+   * Override this method and return `true` to enable the feature.
+   */
+  def enableSemanticNonNull: Boolean = false
+
   inline def recurseSum[R, P, Label, A <: Tuple](
     inline types: List[(String, __Type, List[Any])] = Nil,
     inline schemas: List[Schema[R, Any]] = Nil

core/src/main/scala/caliban/schema/Schema.scala

@@ -255,29 +255,32 @@ trait GenericSchema[R] extends SchemaDerivation[R] with TemporalSchema {
   def field[V](
     name: String,
     description: Option[String] = None,
-    directives: List[Directive] = List.empty
+    directives: List[Directive] = List.empty,
+    enableSemanticNonNull: Boolean = false
   ): PartiallyAppliedField[V] =
-    PartiallyAppliedField[V](name, description, directives)
+    PartiallyAppliedField[V](name, description, directives, enableSemanticNonNull)
 
   /**
    * Manually defines a lazy field from a name, a description, some directives and a resolver.
    */
   def fieldLazy[V](
     name: String,
     description: Option[String] = None,
-    directives: List[Directive] = List.empty
+    directives: List[Directive] = List.empty,
+    enableSemanticNonNull: Boolean = false
   ): PartiallyAppliedFieldLazy[V] =
-    PartiallyAppliedFieldLazy[V](name, description, directives)
+    PartiallyAppliedFieldLazy[V](name, description, directives, enableSemanticNonNull)
 
   /**
    * Manually defines a field with arguments from a name, a description, some directives and a resolver.
    */
   def fieldWithArgs[V, A](
     name: String,
     description: Option[String] = None,
-    directives: List[Directive] = Nil
+    directives: List[Directive] = Nil,
+    enableSemanticNonNull: Boolean = false
   ): PartiallyAppliedFieldWithArgs[V, A] =
-    PartiallyAppliedFieldWithArgs[V, A](name, description, directives)
+    PartiallyAppliedFieldWithArgs[V, A](name, description, directives, enableSemanticNonNull)
 
   /**
    * Creates a new hand-rolled schema. For normal usage use the derived schemas, this is primarily for schemas
@@ -696,7 +699,12 @@ trait TemporalSchema {
 
 case class FieldAttributes(isInput: Boolean, isSubscription: Boolean)
 
-abstract class PartiallyAppliedFieldBase[V](name: String, description: Option[String], directives: List[Directive]) {
+abstract class PartiallyAppliedFieldBase[V](
+  name: String,
+  description: Option[String],
+  directives: List[Directive],
+  enableSemanticNonNull: Boolean
+) {
   def apply[R, V1](fn: V => V1)(implicit ev: Schema[R, V1], ft: FieldAttributes): (__Field, V => Step[R]) =
     either[R, V1](v => Left(fn(v)))(ev, ft)
 
@@ -716,30 +724,43 @@ abstract class PartiallyAppliedFieldBase[V](name: String, description: Option[St
       deprecationReason = Directives.deprecationReason(directives),
       directives = Some(
         directives.filter(_.name != "deprecated") ++ {
-          if (ev.optional && ev.semanticNonNull) Some(Directive("semanticNonNull"))
+          if (enableSemanticNonNull && ev.optional && ev.semanticNonNull) Some(Directive("semanticNonNull"))
           else None
         }
       ).filter(_.nonEmpty)
     )
 }
 
-case class PartiallyAppliedField[V](name: String, description: Option[String], directives: List[Directive])
-    extends PartiallyAppliedFieldBase[V](name, description, directives) {
+case class PartiallyAppliedField[V](
+  name: String,
+  description: Option[String],
+  directives: List[Directive],
+  enableSemanticNonNull: Boolean
+) extends PartiallyAppliedFieldBase[V](name, description, directives, enableSemanticNonNull) {
   def either[R, V1](
     fn: V => Either[V1, Step[R]]
   )(implicit ev: Schema[R, V1], ft: FieldAttributes): (__Field, V => Step[R]) =
     (makeField, (v: V) => fn(v).fold(ev.resolve, identity))
 }
 
-case class PartiallyAppliedFieldLazy[V](name: String, description: Option[String], directives: List[Directive])
-    extends PartiallyAppliedFieldBase[V](name, description, directives) {
+case class PartiallyAppliedFieldLazy[V](
+  name: String,
+  description: Option[String],
+  directives: List[Directive],
+  enableSemanticNonNull: Boolean
+) extends PartiallyAppliedFieldBase[V](name, description, directives, enableSemanticNonNull) {
   def either[R, V1](
     fn: V => Either[V1, Step[R]]
   )(implicit ev: Schema[R, V1], ft: FieldAttributes): (__Field, V => Step[R]) =
     (makeField, (v: V) => FunctionStep(_ => fn(v).fold(ev.resolve, identity)))
 }
 
-case class PartiallyAppliedFieldWithArgs[V, A](name: String, description: Option[String], directives: List[Directive]) {
+case class PartiallyAppliedFieldWithArgs[V, A](
+  name: String,
+  description: Option[String],
+  directives: List[Directive],
+  enableSemanticNonNull: Boolean
+) {
   def apply[R, V1](fn: V => (A => V1))(implicit ev1: Schema[R, A => V1], fa: FieldAttributes): (__Field, V => Step[R]) =
     (
       Types.makeField(
@@ -753,7 +774,7 @@ case class PartiallyAppliedFieldWithArgs[V, A](name: String, description: Option
         deprecationReason = Directives.deprecationReason(directives),
         directives = Some(
           directives.filter(_.name != "deprecated") ++ {
-            if (ev1.optional && ev1.semanticNonNull) Some(Directive("semanticNonNull"))
+            if (enableSemanticNonNull && ev1.optional && ev1.semanticNonNull) Some(Directive("semanticNonNull"))
             else None
           }
         ).filter(_.nonEmpty)

core/src/test/scala/caliban/schema/SchemaSpec.scala

@@ -26,33 +26,11 @@ object SchemaSpec extends ZIOSpecDefault {
           isSome(hasField[__Type, __TypeKind]("kind", _.kind, equalTo(__TypeKind.SCALAR)))
         )
       },
-      test("effectful field as semanticNonNull") {
-        assert(introspect[EffectfulFieldSchema].fields(__DeprecatedArgs()).toList.flatten.headOption)(
-          isSome(
-            hasField[__Field, Option[List[Directive]]](
-              "directives",
-              _.directives,
-              isSome(contains((Directive("semanticNonNull"))))
-            )
-          )
-        )
-      },
       test("effectful field as non-nullable") {
         assert(introspect[EffectfulFieldSchema].fields(__DeprecatedArgs()).toList.flatten.apply(1)._type)(
           hasField[__Type, __TypeKind]("kind", _.kind, equalTo(__TypeKind.NON_NULL))
         )
       },
-      test("optional effectful field") {
-        assert(introspect[OptionalEffectfulFieldSchema].fields(__DeprecatedArgs()).toList.flatten.headOption)(
-          isSome(
-            hasField[__Field, Option[List[Directive]]](
-              "directives",
-              _.directives.map(_.filter(_.name == "semanticNonNull")).filter(_.nonEmpty),
-              isNone
-            )
-          )
-        )
-      },
       test("infallible effectful field") {
         assert(introspect[InfallibleFieldSchema].fields(__DeprecatedArgs()).toList.flatten.headOption.map(_._type))(
           isSome(hasField[__Type, __TypeKind]("kind", _.kind, equalTo(__TypeKind.NON_NULL)))
@@ -322,7 +300,7 @@ object SchemaSpec extends ZIOSpecDefault {
                          |}
                          |
                          |type EnvironmentSchema {
-                         |  test: Int @semanticNonNull
+                         |  test: Int
                          |  box: Box!
                          |}
                          |

core/src/test/scala/caliban/schema/SemanticNonNullSchemaSpec.scala

@@ -0,0 +1,49 @@
+package caliban.schema
+
+import caliban._
+import caliban.introspection.adt.{ __DeprecatedArgs, __Field }
+import caliban.parsing.adt.Directive
+import caliban.schema.Annotations._
+import zio._
+import zio.test.Assertion._
+import zio.test._
+
+object SemanticNonNullSchema extends SchemaDerivation[Any] {
+  override def enableSemanticNonNull: Boolean = true
+}
+
+object SemanticNonNullSchemaSpec extends ZIOSpecDefault {
+  override def spec =
+    suite("SemanticNonNullSchemaSpec")(
+      test("effectful field as semanticNonNull") {
+        assert(effectfulFieldObjectSchema.toType_().fields(__DeprecatedArgs()).toList.flatten.headOption)(
+          isSome(
+            hasField[__Field, Option[List[Directive]]](
+              "directives",
+              _.directives,
+              isSome(contains((Directive("semanticNonNull"))))
+            )
+          )
+        )
+      },
+      test("optional effectful field") {
+        assert(optionalEffectfulFieldObjectSchema.toType_().fields(__DeprecatedArgs()).toList.flatten.headOption)(
+          isSome(
+            hasField[__Field, Option[List[Directive]]](
+              "directives",
+              _.directives.map(_.filter(_.name == "semanticNonNull")).filter(_.nonEmpty),
+              isNone
+            )
+          )
+        )
+      }
+    )
+
+  case class EffectfulFieldObject(q: Task[Int], @GQLNonNullable qAnnotated: Task[Int])
+  case class OptionalEffectfulFieldObject(q: Task[Option[String]], @GQLNonNullable qAnnotated: Task[Option[String]])
+
+  implicit val effectfulFieldObjectSchema: Schema[Any, EffectfulFieldObject]                 =
+    SemanticNonNullSchema.gen[Any, EffectfulFieldObject]
+  implicit val optionalEffectfulFieldObjectSchema: Schema[Any, OptionalEffectfulFieldObject] =
+    SemanticNonNullSchema.gen[Any, OptionalEffectfulFieldObject]
+}