61 lines
1.2 KiB
Rust
61 lines
1.2 KiB
Rust
use owl::{db::model::person::Person, prelude::*};
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#[model]
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#[derive(Debug)]
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pub struct Car {
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pub id: Id,
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pub price: u32,
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pub driver: IdRef<Person>,
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}
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pub fn main() {
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env_logger::init();
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// Init
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let db = Database::in_memory();
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let per = Person::new_id("perso", "P1", "");
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let per2: Person = Person::new_id("perso2", "P2", "");
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// Save
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let car = Car {
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id: Id::new_ulid(),
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price: 1000,
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driver: per.reference(),
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};
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db.save(per);
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let per2 = db.save(per2);
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let mut car = db.save(car);
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println!(
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"P1 has {} cars",
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db.query(|car: &Car| {
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car.driver
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.dereference(&db)
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.read()
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.first_name
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.current()
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.unwrap()
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.as_str()
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== "P1"
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})
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.iter()
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.count()
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);
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car.write(&db, |car| {
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car.driver = per2.reference();
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});
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println!(
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"P1 has {} cars",
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db.query(|car: &Car| {
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car.driver
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.try_dereference(&db)
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.map(|x| x.read().first_name.current().unwrap().as_str() == "P1")
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.unwrap_or(false)
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})
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.iter()
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.count()
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);
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}
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