@Schema annotation with type String and allowableValues set doesn't generate enum drop-down in swagger-ui after upgrading from 1.6.6 (when Spring custom converter is used)

Describe the bug

After upgrading from springdoc-openapi 1.6.6 to 1.6.7/1.6.8 enum drop-down is not visible in swagger-ui.

EDIT: problem is most likely a custom converter with enum (plain or decorated with schema-annotation). More details from comments.

This works with 1.6.6. as expected, but in 1.6.7/1.6.8 there is only normal empty text-field and not the enum drop-down with allowable values:

@Schema(type = "String", allowableValues = {
    "foo", "bar"
})
public enum FooBar {
[..]

And enum is used as pathvariable in controller:

@GetMapping(value = "/some/path/{fooBar}")
public void getFooBar(@PathVariable FooBar fooBar) {
[..]

• What version of spring-boot you are using? 2.6.7
• What modules and versions of springdoc-openapi are you using? 1.6.6 works, 1.6.7/1.6.8 doesn’t

[bnasslahsen]

@solita-alperttiti,

Should be fixed with the next release.

This is the workaround, until then

    @GetMapping(value = "/example/{fooBar}")
    public String getFooBar(@PathVariable @Parameter(schema = @Schema(allowableValues = { "foo", "bar" })) FooBar fooBar) {
        return fooBar.name();
    }

[solita-alperttiti]

@bnasslahsen I have made a sample project to help reproducing the described behavior easily.

Please see: https://github.com/solita-alperttiti/springdoc-enum-example