chopin-orm

High-fidelity engineering for the modern virtuoso.

chopin-orm provides a high‑performance ORM layer built on top of chopin-pg. It offers zero‑allocation query construction and type‑safe mapping of Rust structs to PostgreSQL tables.

🛠️ Usage Example

use chopin_orm::{Model, PgPool, PgValue};

#[derive(Model, Debug)]
#[model(table_name = "users")]
struct User {
    #[model(primary_key)]
    id: i32,
    username: String,
    email: String,
}

fn main() -> Result<(), Box<dyn std::error::Error>> {
    let config = PgConfig::from_url("postgres://user:pass@localhost:5432/db")?;
    let mut pool = PgPool::connect(config, 5)?;

    // Create
    let mut user = User { id: 0, username: "virtuoso".into(), email: "paganini@example.com".into() };
    user.insert(&mut pool)?;

    // Retrieve
    let found = User::find()
        .filter("id = $1", vec![PgValue::Int4(user.id)])
        .one(&mut pool)?;

    // Update
    if let Some(mut u) = found {
        u.username = "chopin".into();
        u.update(&mut pool)?;
    }

    Ok(())
}