How to set $ref in OpenApiSchema

[wunderlichh]

Hey,
i have a problem with the new v10 version of this library.
My code contains some DTO classes with normal string property values. I annotate those properties with an custom attribute "DomainEnumeration" to signal an ISchemaFilter to override the types of those string properties with an $ref to an known schema of this enum. This is done to not have to deal with my custom enum type & ASP.NET Core model binding and have a strongly typed value at the client side (i auto generate the TS client code).

My problem is that the new version of this library doesnt seem to have the Reference property on OpenApiSchema and i dont find a way to circumvent this.

Snippet of my schema filter (the working v9.0.6 version)

public class DomainEnumerationSchemaFilter : ISchemaFilter
{
    public void Apply(OpenApiSchema schema, SchemaFilterContext context)
    {
        var domainEnumerationAttribute = context.MemberInfo?.GetCustomAttributes(false)
            .OfType<OpenApiDomainEnumerationAttribute>()
            .FirstOrDefault();

        if (domainEnumerationAttribute != null)
        {
            var domainEnumerationName = domainEnumerationAttribute.DomainEnumerationType.Name;

            // Add a custom enum schema if it doesnt already exists
            if (!context.SchemaRepository.Schemas.TryGetValue(domainEnumerationName, out _))
            {
                List<IOpenApiAny> enumCases = [];

                foreach (var enumValue in Enumeration.GetAll(domainEnumerationAttribute.DomainEnumerationType))
                    enumCases.Add(new OpenApiString(enumValue.Name));

                var enumSchema = new OpenApiSchema
                {
                    Type = "string",
                    Enum = enumCases
                };
                context.SchemaRepository.AddDefinition(domainEnumerationName, enumSchema);
            }

            // Manipulate the property to reference the enum schema instead
            var enumSchemaRef = new OpenApiReference
            {
                Id = domainEnumerationName,
                Type = ReferenceType.Schema
            };
            schema.Reference = enumSchemaRef;
        }
    }
}

Any hint or help is much appreciated!

[martincostello]

Instead you need to use the OpenApiSchemaReference class.

[wunderlichh]

Hey thanks for your reply but i dont really know what you mean. My current code uses the OpenApiSchemaReference class instead of the OpenApiReference but the next line where i set this reference chema.Reference = enumSchemaRef isnt available. I guess i just need one more hint in the right direction :)

[martincostello]

Oh, I didn't spot that. In that case I'm not sure. That's more of a question for OpenAPI.NET.