minor

Author: ghik

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

@@ -44,7 +44,11 @@ object RestStructure extends AdtMetadataCompanion[RestStructure] {
         })
         Discriminator(caseFieldName, mapping)
       }
-      RefOr(applyAdjusters(Schema(oneOf = caseSchemas, discriminator = disc.toOptArg)))
+      RefOr(applyAdjusters(Schema(
+        `type` = DataType.Object,
+        oneOf = caseSchemas,
+        discriminator = disc.toOptArg
+      )))
     }
   }
   object Union extends AdtMetadataCompanion[Union]

commons-core/src/test/scala/com/avsystem/commons/rest/openapi/OpenApiGenerationTest.scala

@@ -471,6 +471,7 @@ class OpenApiGenerationTest extends FunSuite {
         |  "components": {
         |    "schemas": {
         |      "BaseEntity": {
+        |        "type": "object",
         |        "oneOf": [
         |          {
         |            "type": "object",
@@ -523,6 +524,7 @@ class OpenApiGenerationTest extends FunSuite {
         |        ]
         |      },
         |      "FlatBaseEntity": {
+        |        "type": "object",
         |        "description": "Flat sealed entity with some serious cases",
         |        "oneOf": [
         |          {