Fix for #967: Resolve ResponsesModel union to plain model name in URL path - #968
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Fix for #967: Resolve ResponsesModel union to plain model name in URL path#968lzandman wants to merge 1 commit into
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…in URL path
`PrepareRequest.modelNameOrNull()` called `toString()` on whatever `model()`
returned, so a `ResponsesModel` leaked its debug form into the Azure deployment
path (`ResponsesModel{string=gpt-5.4}` instead of `gpt-5.4`). Resolve the union
through its visitor and add tests for the string, chat, and responses-only
variants.
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Summary
Fixes #967 — a regression of #371.
PrepareRequest.modelNameOrNull()reflectively callsmodel()on the request params, unwraps anOptional, and then callstoString()on whatever remains. For the Responses API,model()returnsOptional<ResponsesModel>, a union wrapper whosetoString()is a debug representation. Against a deployment-based Azure base URL that string leaked straight into the path:The gateway rejected the malformed segment with a 404.
Changes
modelNameOrNull()now unwraps theOptionalfirst, then resolves aResponsesModelthrough itsVisitorinstead oftoString(): the string variant is used as-is, and theChatModel/ResponsesOnlyModelvariants use their enumtoString(), which already yields the wire value. An unknown variant returnsnull.PrepareRequestTestcases forResponseCreateParamsbuilt with a plain string, aChatModel, and aResponsesOnlyModel.