[BUG] Response body is missing from custom exception message

[ddl-rliu]

Bug Report Checklist

• Have you provided a full/minimal spec to reproduce the issue?
• Have you validated the input using an OpenAPI validator?
• Have you tested with the latest master to confirm the issue still exists?
• Have you searched for related issues/PRs?
• What's the actual output vs expected output?
• [Optional] Sponsorship to speed up the bug fix or feature request (example)

Description

When using the API client and encountering an exception, the user sees

E           ...exceptions.ServiceException: (500)
E           Reason: Internal Server Error
E           HTTP response headers: HTTPHeaderDict(...)
E           HTTP response body: error=None

This is unfortunate, as the useful response body of the exception is "overriden" by the not-useful response data "error=None"

openapi-generator version

7.14.0

OpenAPI declaration file content or url

Generation Details

Steps to reproduce

Create a call against a client which produces e.g. a 500 error, with an http response containing response data, and a useful response body. The useful response body will be missing from the exception str.

Related issues/PRs

#22352

Suggest a fix

master...ddl-rliu:openapi-generator:patch-1

[ddl-rliu]

I found it a bit hard to describe the issue in words, but looking at the code the issue (and fix!) is relatively straightforward.

modules/openapi-generator/src/main/resources/python/exceptions.mustache
...
        if self.data or self.body:
            error_message += "HTTP response body: {0}\n".format(self.data or self.body)

Note that the response body may get "overriden" by the response data, which is unfortunate in cases where the repsonse body contains very useful logs.