rust-mysql-simple

Mysql client library implemented in rust. Feel free to open a new issues and pull requests.

Documentation

Latest crate API docs hosted here.

Installation

Also you can use git via another [dependencies.*] section in your Cargo.toml:

[dependencies.mysql]
git = "https://github.com/blackbeam/rust-mysql-simple"

rust-mysql-simple offer support of SSL via ssl cargo feature which is enabled by default. If you have no plans to use SSL, then you should disable that feature to not to depend on rust-openssl:

# For crates.io
[dependencies.mysql]
mysql = "*"
default-features = false

# For git
[dependencies.mysql]
git = "https://github.com/blackbeam/rust-mysql-simple"
default-features = false

Simple example:

extern crate mysql;

use std::default::Default;

use mysql::conn::MyOpts;
use mysql::conn::pool::MyPool;
use mysql::value::from_value;

#[derive(Debug, PartialEq, Eq)]
struct Payment {
    customer_id: i32,
    amount: i32,
    account_name: Option<String>,
}

fn main() {
    let opts = MyOpts {
        user: Some("some_user".into()),
        pass: Some("some_password".into()),
        ..Default::default()
    };
    let pool = MyPool::new(opts).unwrap();

    // Let's create payment table.
    // It is temporary so we do not need `tmp` database to exist.
    // We will use into_iter() because we does not need to map Stmt to anything else.
    // Also we assume that no error happened in `prepare`.
    for mut stmt in pool.prepare("CREATE TEMPORARY TABLE tmp.payment (customer_id int not null, amount int not null, account_name text)").into_iter() {
        // Unwap just to make sure no error happened
        stmt.execute(&[]).unwrap();
    }

    let payments = vec![
        Payment { customer_id: 1, amount: 2, account_name: None },
        Payment { customer_id: 3, amount: 4, account_name: Some("foo".into()) },
        Payment { customer_id: 5, amount: 6, account_name: None },
        Payment { customer_id: 7, amount: 8, account_name: None },
        Payment { customer_id: 9, amount: 10, account_name: Some("bar".into()) },
    ];

    // Let's insert payments to the database
    // We will use into_iter() because we does not need to map Stmt to anything else.
    // Also we assume that no error happened in `prepare`.
    for mut stmt in pool.prepare("INSERT INTO tmp.payment (customer_id, amount, account_name) VALUES (?, ?, ?)").into_iter() {
        for p in payments.iter() {
            // Unwrap each result just to make sure no errors happended
            stmt.execute(&[&p.customer_id, &p.amount, &p.account_name]).unwrap();
        }
    }


    // Let's select payments from the database
    let selected_payments: Vec<Payment> = pool.prepare("SELECT customer_id, amount, account_name from tmp.payment")
    .and_then(|mut stmt| { // In this closure we will map `Stmt` to `Vec<Payment>`
        // Here we must use nested combinator because `stmt` must be in scope while working with `QueryResult`
        stmt.execute(&[]).map(|result| { // In this closure we will map `QueryResult` to `Vec<Payment>`
            // QueryResult is iterator over `MyResult<row,err>`
            // so first call to map will map each `MyResult` to contained `row` (no proper error handling)
            // and second call to map will map each `row` to `Payment`
            result.map(|x| x.unwrap()).map(|row| {
                Payment {
                    customer_id: from_value(&row[0]),
                    amount: from_value(&row[1]),
                    account_name: from_value(&row[2]),
                }
            }).collect() // Collect payments so now `QueryResult` is mapped to `Vec<Payment>`
        }) // bubble up `Vec<Payment>` to upper level `and_than`
    }).unwrap(); // Unwrap `Vec<Payment>`

    // Now make shure that `payments` equals `selected_payments`
    // mysql gives no guaranties on order of returned rows without `ORDER BY` so assume we are lukky
    assert_eq!(payments, selected_payments);
    println!("Yay!");
}

LuoZijun/rust-mysql-simple

rust-mysql-simple

Documentation

Installation