added missing example field in OpenAPI Schema object

Author: ghik

commons-core/src/main/scala/com/avsystem/commons/rest/openapi/OpenApi.scala

@@ -258,7 +258,8 @@ case class Schema(
   @td discriminator: OptArg[Discriminator] = OptArg.Empty,
 
   @td enum: List[JsonValue] = Nil,
-  @td default: OptArg[JsonValue] = OptArg.Empty
+  @td default: OptArg[JsonValue] = OptArg.Empty,
+  @td example: OptArg[JsonValue] = OptArg.Empty
 )
 object Schema extends HasGenCodec[Schema] {
   final val Boolean = Schema(`type` = DataType.Boolean)

commons-core/src/main/scala/com/avsystem/commons/rest/openapi/adjusters/Adjuster.scala

@@ -198,9 +198,13 @@ class pathSummary(summary: String) extends PathItemAdjuster {
 }
 
 /**
-  * Adds example to [[Parameter]] object generated for REST method parameter annotated with this annotation.
+  * Adds example to [[Schema]] or [[Parameter]] object
   */
-class example[+T](value: T, @infer asJson: AsRaw[JsonValue, T] = infer.value) extends ParameterAdjuster {
+class example[+T](value: T, @infer asJson: AsRaw[JsonValue, T] = infer.value)
+  extends SchemaAdjuster with ParameterAdjuster {
+
+  def adjustSchema(schema: Schema): Schema =
+    schema.copy(example = asJson.asRaw(value))
   def adjustParameter(parameter: Parameter): Parameter =
     parameter.copy(example = asJson.asRaw(value))
 }