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value_list.rs
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/
value_list.rs
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use scylla::{Session, SessionBuilder};
use std::env;
#[tokio::main]
async fn main() {
let uri = env::var("SCYLLA_URI").unwrap_or_else(|_| "127.0.0.1:9042".to_string());
println!("Connecting to {} ...", uri);
let session: Session = SessionBuilder::new().known_node(uri).build().await.unwrap();
session.query("CREATE KEYSPACE IF NOT EXISTS ks WITH REPLICATION = {'class' : 'SimpleStrategy', 'replication_factor' : 1}", &[]).await.unwrap();
session
.query(
"CREATE TABLE IF NOT EXISTS ks.my_type (k int, my text, primary key (k))",
&[],
)
.await
.unwrap();
#[derive(scylla::ValueList)]
struct MyType<'a> {
k: i32,
my: Option<&'a str>,
}
let to_insert = MyType {
k: 17,
my: Some("Some str"),
};
session
.query("INSERT INTO ks.my_type (k, my) VALUES (?, ?)", to_insert)
.await
.unwrap();
// You can also use type generics:
#[derive(scylla::ValueList)]
struct MyTypeWithGenerics<S: scylla::frame::value::Value> {
k: i32,
my: Option<S>,
}
let to_insert_2 = MyTypeWithGenerics {
k: 18,
my: Some("Some string".to_owned()),
};
session
.query("INSERT INTO ks.my_type (k, my) VALUES (?, ?)", to_insert_2)
.await
.unwrap();
let q = session
.query("SELECT * FROM ks.my_type", &[])
.await
.unwrap();
println!("Q: {:?}", q.rows);
}