#快速开始

use a3s_orm::{
    insert_into, orm_table, select_from, Database, SqliteDialect,
    SqliteExecutor,
};

orm_table! {
    struct Person => "person" {
        id: i64 => "id",
        name: String => "name",
        age: i32 => "age",
    }
}

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    let executor = SqliteExecutor::open_in_memory().await?;
    executor
        .execute_schema(
            "create table person (\
             id integer primary key, \
             name text not null, \
             age integer not null)",
        )
        .await?;

    let database = Database::new(SqliteDialect, executor);

    database
        .execute(
            insert_into::<Person>()
                .value(Person::id(), 1)
                .value(Person::name(), "Ada")
                .value(Person::age(), 36),
        )
        .await?;

    let (name, age): (String, i32) = database
        .fetch_one_as(
            select_from::<Person>()
                .select((Person::name(), Person::age()))
                .filter(Person::id().eq(1)),
        )
        .await?;

    assert_eq!((name.as_str(), age), ("Ada", 36));
    Ok(())
}

use a3s_orm::{select_from, Query, SqliteDialect};

let compiled = select_from::<Person>()
    .select(Person::name())
    .filter(Person::age().gte(18))
    .limit(20)
    .compile(&SqliteDialect)?;

assert_eq!(
    compiled.sql,
    "select \"person\".\"name\" from \"person\" \
     where (\"person\".\"age\" >= ?) limit ?",
);
assert_eq!(compiled.parameters.len(), 2);
# Ok::<(), a3s_orm::Error>(())