Can not use custom types in "One Of"

[goganchic]

I'm describing map POI api. So I have api method /map_markers which returns an array of markers. Each marker can be a poi or a cluster. I use such api description

FORMAT: 1A

# Test

# Data Structures

## Poi

+ name (string, required)
+ address (string, required)
+ phone (number, optional)

## Location

+ lon (number, required)
+ lat (number, required)

## MapMarker

+ One Of
    + Properties
        + kind: poi (string, required, fixed)
        + poi (Poi, required)
        + location (Location, required)
    + Properties
        + kind: cluster (string, required, fixed)
        + size (number, required)
        + location (Location, required)

# Group api

## POIs [/map_markers]

### Get POIs list [GET]

+ Response 200 (application/json)
    + Attributes
        + result (array[MapMarker], required, fixed)

but if I use custom type in One Of section (not just a number or string) - json schema will be wrong:

{
  "$schema": "http://json-schema.org/draft-04/schema#",
  "type": "object",
  "properties": {
    "result": {
      "type": "array",
      "items": [
        {
          "type": "object",
          "properties": {},
          "oneOf": [
            {
              "properties": {
                "kind": {
                  "type": "string",
                  "enum": [
                    "poi"
                  ]
                },
                "poi": {
                  "type": "object",
                  "properties": {}
                },
                "location": {
                  "type": "object",
                  "properties": {}
                }
              }
            },
            {
              "properties": {
                "kind": {
                  "type": "string",
                  "enum": [
                    "cluster"
                  ]
                },
                "size": {
                  "type": "number"
                },
                "location": {
                  "type": "object",
                  "properties": {}
                }
              }
            }
          ],
          "additionalProperties": false
        }
      ]
    }
  },
  "required": [
    "result"
  ]
}

Json schema contains empty objects instead of custom types.

[zdne]

Note I've verified this bug with this minimal blueprint:

# GET /ab
- response 200 (application/json)
    - Attributes (A or B)

# Data Structures

## A or B
- One Of
    - Properties
        - text: A (string)
        - somevalue (C)

    - Properties
        - text: B (string)

## C
- c1: C1

[goganchic]

I think that problem in a drafter, not in a snowcrash. IsExpandableVisitor do not process options of select kind, so for select (One Of) element it always tells that object is not expandable. ExpandVisitor has no code to expand select element, so it rendered as is without any modifications.