Openapi swagger documentation generates references

Question

I have a couple enumerations in an annotated object like:

@Schema(description = "Request description")
case class Request(
   @Schema(description = "Enum1 description")
   field2: Enum1,
  
   @Schema(description = "Enum2 description")
   field2: Enum2
)

where the enums are defined as:

sealed trait Enum1 extends EnumEntry
object Enum1 extends Enum[Enum1] {
   case object Value1 extends Enum1
   case object Value2 extends Enum1
}

sealed trait Enum2 extends EnumEntry
object Enum2 extends Enum[Enum2] {
   case object Value3 extends Enum2
   case object Value4 extends Enum2
}

Using Openapi3, I can generate a swagger documentation. My problem is that say Enum1 and Enum2 are translated differently, as in:

"field1":{
    "enum":["Value1","Value2"],
    "type":"string"
},

"field2":{
  "$ref":"#/components/schemas/Enum2"
}

/* ... */

"Enum2":{
  "description":"Enum2 description",
  "type":"object"
}

I want Enum2 to be documented the same as Enum1, so with the actual enumeration values. Is there any way to force this, or any explanation on why this might happen? Two enumerations are basically the same as in the example.

Answer 1

In my case, I managed to solve it by adding the implementation argument to the @Schema annotation. Based on this and this:

@Schema(description = "Request description")
case class Request(
   @Schema(
     implementation = classOf[Enum1],
     description = "Enum1 description"
   )
   field1: Enum1,
)