PHP - anyOf/oneOf primitive type array serialization wrong

[baywet]

related #5348

Repo

openapi: 3.0.3
info:
  title: Example
  description: Example
  version: 1.0.0
servers:
  - url: https://example.com/api
paths:
  '/example1':
    post:
      summary: Test error generation.
      description: "Test generating error with message property."
      operationId: postErrorGeneration
      responses:
        '200':
          description: Success
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Success'
components:
  schemas:
    Success:
      type: object
      oneOf:
        - type: string
        - type: array
          items:
            type: string

(or update to anyOf)

deseralization

public static function createFromDiscriminatorValue(ParseNode $parseNode): ItemPostRequestBody_tax_rates {
        $result = new ItemPostRequestBody_tax_rates();
        if ($parseNode->getStringValue() !== null) {
            $result->setItemPostRequestBodyTaxRatesString($parseNode->getStringValue());
        } else if ($parseNode->getCollectionOfObjectValues([string::class, 'createFromDiscriminatorValue']) !== null) {
            $result->setString($parseNode->getCollectionOfObjectValues([string::class, 'createFromDiscriminatorValue']));
        }
        return $result;
    }

Should instead call out getCollectionOfPrimitiveValues for the second case.

serialization

public function serialize(SerializationWriter $writer): void {
        if ($this->getItemPostRequestBodyTaxRatesString() !== null) {
            $writer->writeStringValue(null, $this->getItemPostRequestBodyTaxRatesString());
        } else if ($this->getString() !== null) {
            $writer->writeCollectionOfPrimitiveValues(null, $this->getString());
        }
    }

Should instead call writeCollectionOfPrimitiveValues for the second case, the conditions are inverted, and the property/getter getItemPostRequestBodyTaxRatesString should be an array of strings, not a simple string.