[BUG][OBJC] Boolean header not being recognised as boolean type

[kierans]

Bug Report Checklist

• Have you provided a full/minimal spec to reproduce the issue?
• Have you validated the input using an OpenAPI validator (example)?
• What's the version of OpenAPI Generator used?
• Have you search for related issues/PRs?
• What's the actual output vs expected output?
• [Optional] Bounty to sponsor the fix (example)

Description

In my Petstore I've added in an input header of type boolean. When I generate the Objc code, the header hasn't been recognised as a boolean, so the relevant template snippet hasn't generated the correct code.

The consequence is that when when the code is run, and the OAIApiClient goes to set the header in the request, the app crashes with the error Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSCFBoolean length]: unrecognized selector sent to instance. This is of course because the type of the value being set is of NSCFBoolean and not a NSString because the snippet wasn't generated to convert the boolean to a string representation for the HTTP request header.

openapi-generator version

4.3.1

OpenAPI declaration file content or url

https://github.com/kierans/openapi-generator-objc-sample

Command line used for generation

$ ./gradlew generateObjc

Steps to reproduce

1. Add an input header of type boolean
2. Generate objc code.

Related issues/PRs

Suggest a fix

[wing328]

In my Petstore I've added in an input header of type boolean. When I generate the Objc code, the header hasn't been recognised as a boolean, so the relevant template snippet hasn't generated the correct code.

That is for the query parameter.

We may need to copy that for the header parameters (and other parameters such as form, path, etc as well)

Would you have time to help contribute a fix on this?

[kierans]

@wing328 If I can get some time on my project I will.