[BUG] [scala-akka-client] Scala Akka client does not support arbitrary query string values

Description

When generating an api with an endpoint that takes an arbitrary set of query string parameters, which is to be represented as Map[String, Any] in the client, the generated code tries to use a query parameter append method that does not support the Map[String, Any] data type.

openapi-generator version

Latest

OpenAPI declaration file content or url

  /api/v1/query:
    get:
      summary: Get a result using some filters
      operationId: getQuery
      parameters:
        - name: filter
          in: query
          required: false
          schema:
            type: object
            additionalProperties: true

Suggest a fix

Currently, it utilises a method withQueryParam which cannot handle a Map type.

def withQueryParam(name: String, value: Any): ApiRequest[U] = copy[U](queryParams = queryParams + (name -> value))

This can be supported by the inclusion of;

def withQueryParam(values: Map[String, Any]): ApiRequest[U] = copy[U](queryParams = queryParams ++ values)

A full solution has been raised as PR #8610.

Start with the Scala Akka client's withQueryParam entry point and the supplied OpenAPI declaration for an object query parameter. Compare the generated request handling with PR #8610 and verify that arbitrary Map[String, Any] query values are supported without breaking ordinary parameters.