welds 0.4.23

An async ORM for (postgres, mssql, mysql, sqlite)
Documentation 
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use super::*;

// Test Object that can be used to write SQL
// Testing with null/some/and unwrapped values
use crate::WeldsModel;

// model with option
#[derive(Debug, WeldsModel)]
#[welds_path(crate)] // needed only within the welds crate.
#[welds(HasMany(orders, Order, "p_fk_id"))]
struct Product {
    #[welds(primary_key)]
    pub pid: i64,
}

#[derive(Debug, WeldsModel)]
#[welds_path(crate)] // needed only within the welds crate.
#[welds(BelongsTo(product, Product, "p_fk_id"))]
#[welds(ManualRelationship(extra, Extra, "extra_order_id1", "extra_order_id2"))]
struct Order {
    #[welds(primary_key)]
    pub oid: i64,
    pub p_fk_id: i64,
    pub extra_order_id1: i64,
}

#[derive(Debug, Default, WeldsModel)]
#[welds(table = "extras")]
#[welds_path(crate)] // needed only within the welds crate.
#[welds(ManualRelationship(order, Order, "extra_order_id2", "extra_order_id1"))]
struct Extra {
    #[welds(primary_key)]
    pub eid: i32,
    pub extra_order_id2: i64,
    pub ext: i32,
}

// Tests

#[test]
fn should_select_through_an_entity() {
    futures::executor::block_on(async move {
        let q = QueryBuilder::<Product>::new()
            .where_col(|c| c.pid.equal(1))
            .map_query(|p| p.orders);
        let client = welds_connections::noop::build(Syntax::Mysql);
        q.run(&client).await.unwrap();
        let ran_sql = client.last_sql().unwrap();
        let expected = r#"SELECT t2.oid, t2.p_fk_id, t2.extra_order_id1 FROM order t2 WHERE ( EXISTS ( SELECT pid FROM product t1 WHERE t1.pid = ? AND t1.pid = t2.p_fk_id ) )"#;
        assert_eq!(expected, &ran_sql);
    });
}

#[test]
fn should_be_able_to_query_with_sub_queries() {
    futures::executor::block_on(async move {
        let products = QueryBuilder::<Product>::new().where_col(|c| c.pid.equal(1));
        let orders = QueryBuilder::<Order>::new().where_relation(|r| r.product, products);

        let client = welds_connections::noop::build(Syntax::Mysql);
        orders.run(&client).await.unwrap();
        let ran_sql = client.last_sql().unwrap();
        let expected = r#"SELECT t1.oid, t1.p_fk_id, t1.extra_order_id1 FROM order t1 WHERE ( EXISTS ( SELECT pid FROM product t2 WHERE t2.pid = ? AND t2.pid = t1.p_fk_id ) )"#;
        assert_eq!(expected, &ran_sql);
    });
}

#[test]
fn should_be_able_to_write_manual_relationships1() {
    futures::executor::block_on(async move {
        let q = QueryBuilder::<Order>::new()
            .where_col(|c| c.oid.equal(1))
            .map_query(|p| p.extra);
        let client = welds_connections::noop::build(Syntax::Mysql);
        q.run(&client).await.unwrap();
        let ran_sql = client.last_sql().unwrap();
        let expected = r#"SELECT t2.eid, t2.extra_order_id2, t2.ext FROM extras t2 WHERE ( EXISTS ( SELECT extra_order_id1 FROM order t1 WHERE t1.oid = ? AND t1.extra_order_id1 = t2.extra_order_id2 ) )"#;
        assert_eq!(expected, &ran_sql);
    });
}

#[test]
fn should_be_able_to_write_manual_relationships2() {
    futures::executor::block_on(async move {
        let extras = QueryBuilder::<Extra>::new().where_col(|c| c.eid.equal(1));
        let orders = QueryBuilder::<Order>::new().where_relation(|r| r.extra, extras);

        let client = welds_connections::noop::build(Syntax::Mysql);
        orders.run(&client).await.unwrap();
        let ran_sql = client.last_sql().unwrap();
        let expected = r#"SELECT t1.oid, t1.p_fk_id, t1.extra_order_id1 FROM order t1 WHERE ( EXISTS ( SELECT extra_order_id2 FROM extras t2 WHERE t2.eid = ? AND t2.extra_order_id2 = t1.extra_order_id1 ) )"#;
        assert_eq!(expected, &ran_sql);
    });
}