Rydantic derive

Procedural macros for Rydantic, a Rust library for data modeling, validation, JSON Schema and native Cap'n Proto.

Use the rydantic crate, which enables and re-exports #[derive(Model)] by default:

[dependencies]
rydantic = "0.3.0"

use rydantic::Model;

#[derive(Debug, Model)]
struct User {
    #[model(trim, min_length = 2)]
    name: String,
    #[model(ge = 18, le = 120)]
    age: u8,
}

let user = User::parse_json(r#"{"name":" Alice ","age":25}"#)?;
assert_eq!(user.name, "Alice");
# Ok::<(), rydantic::ValidationErrors>(())

See the API documentation and complete guide for borrowing, validators, model attributes, schemas and Cap'n Proto mappings.

With rydantic's capnp feature, #[rydantic::capnp_models] on an inline model module also infers the complete Cap'n Proto schema, invokes the installed official capnp compiler, and generates native Rust bindings automatically. Consumers maintain Rust model definitions without a separate schema, generated source file, or build script. The schema is available through CapnpSchema and the model module's CAPNP_SCHEMA constant.

License: MIT.

rydantic-derive 0.3.0

Rydantic derive