[Ask] Did validator can't be used with `serde_json::from_str` ?

[weiztech]

I'm trying to use validator but it seems it does not trigger the validation and always returns success result.

depedencies

[dependencies.validator]
version = "0.16.1"
features = ["derive"]

Code

#[derive(Validate, Debug, Serialize, Deserialize)]
struct User {
    id: u64,
    #[validate(length(max = 1))]
    username: String,
    address: String,
}

let data = r#"
    {
        "id": 43,
        "username": "Joel",
        "address": "+123 55555"
    }"#;

let data = serde_json::from_str::<User>(data);
match data {
        Ok(person) => {
            println!("Deserialized person: {:?}", person);
        }
        Err(error) => {
            println!("Failed to deserialize data. Error: {}", error);
        }
    }

is it possible to trigger the validation when using serde_json::from_str ?

[pintariching]

I think you need to call validate() on the deserialized User struct in the match statement. Or if you want a one-liner try

let validation_result = serde_json::from_str::<User>(data).is_ok_and(|user| user.validate());

Not entirely sure if this will work.

[weiztech]

since it's not possible to validate directly using serde_json::from_str, I also think should use validate method for now. Thanks