OpenAPITools/openapi-generator · error · IllegalArgumentException

Invalid enum property naming '%s'. Must be one of %s.

Error message

Invalid enum property naming '%s'. Must be one of %s.

What it means

Error "Invalid enum property naming '%s'. Must be one of %s." thrown in OpenAPITools/openapi-generator.

Source

Thrown at modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/AbstractTypeScriptClientCodegen.java:1013

    }

    @Override
    public String toEnumName(CodegenProperty property) {
        String enumName = property.name;
        enumName = addSuffix(enumName, enumSuffix);
        return toTypescriptTypeName(enumName, "_");
    }

    protected void setEnumPropertyNaming(String naming) {
        try {
            enumPropertyNaming = ENUM_PROPERTY_NAMING_TYPE.valueOf(naming);
        } catch (IllegalArgumentException e) {
            String values = Stream.of(ENUM_PROPERTY_NAMING_TYPE.values())
                    .map(value -> "'" + value.name() + "'")
                    .collect(Collectors.joining(", "));

            String msg = String.format(Locale.ROOT, "Invalid enum property naming '%s'. Must be one of %s.", naming, values);
            throw new IllegalArgumentException(msg);
        }
    }

    protected ENUM_PROPERTY_NAMING_TYPE getEnumPropertyNaming() {
        return enumPropertyNaming;
    }

    protected void setEnumPropertyNamingReplaceSpecialChar(boolean replaceSpecialChars) {
        enumPropertyNamingReplaceSpecialChar = replaceSpecialChars;
    }

    protected boolean isEnumPropertyNamingReplaceSpecialChar() {
        return enumPropertyNamingReplaceSpecialChar;
    }

    private String getNameUsingEnumPropertyNaming(String name) {
        switch (getEnumPropertyNaming()) {
            case original:

View on GitHub (pinned to fcec517be3)

Solutions

1. Set the additional property enumPropertyNaming to one of the allowed values listed in the message.

When it happens

Trigger: Thrown when the 'enumPropertyNaming' option passed to a TypeScript client generator is not one of the allowed naming styles. Check the --additional-properties enumPropertyNaming value.

Common situations: See trigger scenarios.

AI-assisted analysis of OpenAPITools/openapi-generator@fcec517be3 (2026-08-22). Data as JSON: /api/errors/5e5b6eb01dd12c10. Report an issue: GitHub.