Derive Macro Model 

#[derive(Model)]
{
    // Attributes available to this derive:
    #[orm]
}

Главный derive-макрос. Генерирует:

• impl Model for T
• struct NewT { ... } (без PK и auto-полей)
• Методы find, create, save, delete, all, query, …
• Структуру TColumns для DSL-фильтров
• impl HasColumns for T

Пример

#[derive(Model, Debug, Clone, Serialize, Deserialize)]
#[orm(table = "users")]
pub struct User {
    #[orm(primary_key, auto_increment)]
    pub id: i64,

    #[orm(unique, index)]
    pub email: Email,

    pub username: String,

    #[orm(default = true)]
    pub is_active: bool,

    #[orm(auto_now_add)]
    pub created_at: DateTime<Utc>,

    #[orm(auto_now)]
    pub updated_at: DateTime<Utc>,
}