Discriminator + Mapping not working properly

[LasneF]

When combining Discriminator and mapping , validation looks not working (mapping not taken into account)

Context

given the above API spec defining

Pet (Id , type) and 2 kind of cat both beeing pet
NiceCat (having having miaou field)
hunterCat (having hunter field)

Here is the spec

Notice that the PetResult has a discriminator , if petType match NICE schema have to be niceCatResult , if petType match HUNT schema is hunterCatResult

openapi: 3.1.0
info:
  title: Curves
  version: "1.0"

paths:
  /pet:
    get:
      responses:
        '200':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/PetResult'
              example:
                petType: NICE
                miaou: true
components:
  schemas:
    PetResult:
      oneOf:
        - $ref: '#/components/schemas/niceCatResult'
        - $ref: '#/components/schemas/hunterCatResult'    
      discriminator:
        propertyName: petType
        mapping:
          NICE: '#/components/schemas/niceCatResult'
          HUNT: '#/components/schemas/hunterCatResult'

    PetCommon:
      type: object
      required: 
        - petType
      properties:
        petType:
          type: string

    niceCatResult:
      allOf:
        - $ref: '#/components/schemas/PetCommon'
        - type: object
          required:
            - miaou
          properties:
            miaou:
              type: boolean
    hunterCatResult:
      allOf:
        - $ref: '#/components/schemas/PetCommon'
        - type: object
          properties:
            hunt:
              type: string

Current Behavior

the NiceCat looks mapping hunter cat even if it is set as Nice

[CLI] ► start Prism is listening on http://127.0.0.1:4010
[17:05:38] » [HTTP SERVER] get /pet info Request received

Prism raise
[17:01:24] » [VALIDATOR] × error Violation: response.body Request body must match exactly one schema in oneOf

Looks Prism does not leverage on the petType is set to NICE, and so matching the NICE cat model

Expected Behavior

during payload validation the mapping should be taken into account to pickup the right schema

Possible Workaround/Solution

Not sure it is a bug or a limitation, if it is a limitation , this could be mentionned in the documentation that the mapping keyword has no effect upon validation, and so that models in th oneOf must be imcompatible each others
here nice cat could be also hunter cat .

Steps to Reproduce

take the above Spec,

prism mock spec.yml
curl --location 'http://127.0.0.1:4010/pet'

an error trace occurs
[17:05:38] » [VALIDATOR] × error Violation: response.body Request body must match exactly one schema in oneOf

Notice same appears in proxy validation mode

Environment

Prism 5.2.0

[Chelsea Hohmann]

@LasneF Prism does not support discriminators at this time, and there's no plan to support them in the foreseeable future. We will turn this into a documentation task and get this limitation listed in Prism documentation.