[BUG] [python-nextgen]The method "parameters_to_url_query" throws an error when the input is of type List[int] because the join operation expects string types, but it is being applied to integers.

[NG-chenff]

Bug Report Checklist

• Have you provided a full/minimal spec to reproduce the issue?
• Have you validated the input using an OpenAPI validator (example)?
• 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

The method "parameters_to_url_query" throws an error when the input is of type List[int] because the join operation expects string types, but it is being applied to integers.

input is of type List[int]
Annotated[Optional[conlist(StrictInt)]

Run error

 File "xx\api_client.py", line 552, in <listcomp>
    return "&".join(["=".join(item) for item in new_params])
TypeError: sequence item 1: expected str instance, int found

api_client.py Lines of code

552 return "&".join(["=".join(item) for item in new_params])

Local modification valid
return "&".join(["=".join(str(item)) for item in new_params])

openapi-generator version

OpenAPI declaration file content or url

Generation Details

Steps to reproduce

Related issues/PRs

Suggest a fix

[wing328]

return "&".join(["=".join(str(item)) for item in new_params])

can you please file a PR with the suggested fix?

[NG-chenff]

Input argument:
List[int, int, int]: demo = [1, 2, 3]

Source code snippets provided

new_params.append(
    (k, delimiter.join(quote(str(value)) for value in v)))

will be split as follows: [('demo', 1), ('demo', 2), ('demo', 3)]

The incorrect suggestion:

return "&".join(["=".join(str(item)) for item in new_params])

only tested the local interface and didn't ensure correct URL transmission. If you use this code, the URL format would be incorrect:
(='=d=e=m=o='=,= =1=)&(='=d=e=m=o='=,= =2=)&(='=d=e=m=o='=,= =3=)

Improved suggestion:

return "&".join(["=".join(map(str, item)) for item in new_params])

returns:
demo=1&demo=2&demo=3

If the input arguments are not split:
[('demo', '1,2,3'), ('demo1', '1,2,3')]
the output will be: demo=1,2,3&demo1=1,2,3, which matches the expected format.

Note:
Since the initial input argument was split into multiple fields by another method, the input argument cannot be demo=1,2,3. I'm not sure if this will affect the use of the URL.

return "&".join(["=".join(str(item)) for item in new_params])

can you please file a PR with the suggested fix?