How to implement Union with value of the enum is of the same type

[newholder]

So, I have this struct that contains this enum

#[derive(Debug, Serialize, Deserialize, Object)]
pub struct Assay {
    pub id: ValidId,
    pub value: AssayValue,
}

#[derive(Debug, Serialize, Deserialize, Union)]
pub enum AssayValue {
    Ordinal(String),
    Numerical(String),
}

when i return it as a response type, it will flatten it to just a string. Here's an example response:

from this

Assay {
    id: ValidId(
        "TB_ACID_FAST",
    ),
    value: Numerical(
        "Scanty",
    ),
}

to this:

{
        "id": "TB_ACID_FAST",
        "value": "Scanty"
}

so, when I post it as a payload to endpoint that accepts it and then debugprint the resulting struct, it doesn't respect the enum. Here's the debug print:

    Assay {
        id: ValidId(
            "TB_ACID_FAST",
        ),
        value: Ordinal(
            "Scanty",
        ),
    }

my workaround is currently just making two different struct that describes the same thing, one for value, one just for scheme and implement ways to convert between two of them, with the schema one containing an intermediate struct with fieldname that match enum variant. Is there a way to make it respect the enum?