Deserializer doesn't support allOf in properties

[Tiller]

The current implementation is not able to handle object properties that are defined using "allOf"
"allOf" is supported at the root of definitions through the "ComposedModel", but not much anywhere else.

The following example cannot be deserialized properly:

definitions:
  standaloneDef:
    type: object
    description: Standalone
    properties:
      name:
        type: string
        description: name
        
  defWithDep:
    type: object
    description: With dep
    required:
    - id
    properties:
      id:
        type: string
        description: id
        example: "0x00"
      def:
        type: object
        allOf:
        - $ref: "#/definitions/standaloneDef"
        - type: object
          properties:
            otherProp:
              type: string

The 'def' attribute in 'defWithDep' ends up with no property at all after deserialization. It is read as the following:

{
  "swagger" : "2.0",
  "info" : {
    "version" : "0.0.1",
    "title" : "..."
  },
  "basePath" : "...",
  "paths" : {},
  "definitions" : {
    "standaloneDef" : {
      "type" : "object",
      "properties" : {
        "name" : {
          "type" : "string",
          "description" : "name"
        }
      },
      "description" : "Standalone"
    },
    "defWithDep" : {
      "type" : "object",
      "required" : [ "id" ],
      "properties" : {
        "id" : {
          "type" : "string",
          "example" : "0x00",
          "description" : "id"
        },
        "def" : {
          "type" : "object",
          "properties" : { }
        }
      },
      "description" : "With dep"
    }
  },
  "parameters" : { },
  "responses" : { }
}

Regarding how I ended up in this scenario is because of a long time running conversation here: vendor extensions next to references. I need to do the following:

defWithDep:
  type: object
  properties:
    def:
      $ref: "#/definitions/standaloneDef"
      x-thingy: thing

but the (one of the) only way to do it, is by using allOf:

defWithDep:
  type: object
  properties:
    def:
      x-thingy: thing
      allOf:
      - $ref: "#/definitions/standaloneDef"

which is - afaik - compliant with the spec (swagger editor manages it well)

[frantuma]

implemented in #2890