PlanetScale Serverless Driver for Rust™

Rust "version" of database-js. As stated in database-js it uses PlanetScale HTTP api for database queries. It will run perfectly run on Cloudflare Workers Or Vercel Edge Functions.

Usage

```bash cargo add planetscale-driver

also "cargo add anyhow"

```

Then proceed like in examples!

Examples

Connection and simple SQL execution

```rust use planetscale_driver::PSConnection;

let mut conn = PSConnection::new( "", "", "", );

let res = conn.execute("SELECT 1").await.unwrap(); ```

fetchone/fetchall/fetch_scalar

As you can see, deserialization doesn't use field names (MAYBE IN FUTURE) so remember to write your structs correctly!

```rust use planetscale_driver::{Database, Deserializer, query};

[derive(Database, Debug)]

struct TestD { val: u32 }

// ...

let res: TestD = query("SELECT 1").fetch_one(&mut conn).await?; println!("{:?}", res);

let res: Vec = query("SELECT val FROM testds").fetch_all(&mut conn).await?; println!("{:?}", res);

let res: bool = query("SELECT true").fetch_scalar(&mut conn).await?; println!("{:?}", res); ```

QueryBuilder

If you want to bind safely values into your query, you should use QueryBuilder

Note: now query method is wrapper around QueryBuilder

```rust // ...

// note: values passed to .bind function must have trait ToString let id = 69; let name = "420";

// res there will be empty result, if you want to get reponse data use "execute_raw" let res = query("INSERT INTO test(id, name) VALUES($0, \"$1\")") .bind(id) .bind(name) .execute(&mut conn) .await?; ```

Transactions

```rust // ...

// NOTE: conn in closure isn't affecting main conn, its copied so session // isn't modifed on "original" conn conn.transaction(|conn| async move { // ^- conn is Arc Mutex so we must do that // note: it's not normal mutex (it's async mutex) let mut conn = conn.lock().await;

conn.execute("QUERY")
    .await?;

conn.execute("OTHER QUERY")
    .await?;

//     ^- use question mark to propagate errors "up"
//        it's required if you want to rollback changes after error

Ok(())

}).await?; ```

More examples in the examples folder

If you want to run them: bash PS_HOST=<host> PS_USER=<username> PS_PASS=<pscale_password> cargo run --example <example_name>