How to add nullable type when using MAP_VALUES_AS_ADDITIONAL_PROPERTIES?

[namgaxilem]

Currently my config is like this:

And the generate chema is like this:

But I want my Map<String, String> can be nullable also, for example my json contain a null field, it will fail (for keyring-file):

I tried withAdditionalPropertiesResolver but can not find a way to add null type belong with String type, my expectation is that type should be ["string", "null"] instead of "string" only.

[CarstenWickner]

Hi @namgaxilem,

For now, you might want to give this a try:

configBuilder.forTypesInGeneral().withAdditionalPropertiesResolver((scope, context) -> {
        if (scope.getType().isInstanceOf(Map.class)) {
            ObjectNode schema = context.getGeneratorConfig().createObjectNode();
            ArrayNode anyOf = schema.putArray(context.getKeyword(SchemaKeyword.TAG_ANYOF));
            anyOf.addObject().put(context.getKeyword(SchemaKeyword.TAG_TYPE), context.getKeyword(SchemaKeyword.TAG_TYPE_NULL));
            anyOf.add(context.createStandardDefinitionReference(scope.getTypeParameterFor(Map.class, 1), null));
            return schema;
        }
        return null;
    });

Need to find some more time to think about how to best handle this case in a more standardized way.

[namgaxilem]

Thank you very much for your response, in my case, I applied your code for both forTypesInGeneral and forFields and it work!