Crate mysql_async

mysql-async

Tokio based asynchronous MySql client library for rust programming language.

Installation

Library hosted on crates.io.

[dependencies]
mysql = "<desired version>"

Example

extern crate futures;
#[macro_use]
extern crate mysql_async as my;
extern crate tokio_core as tokio;
// ...

use futures::Future;
use my::prelude::*;
use tokio::reactor::Core;

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

fn main() {
    let mut lp = Core::new().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 pool = my::Pool::new(database_url, &lp.handle());
    let future = pool.get_conn().and_then(|conn| {
        // Create temporary table
        conn.drop_query(
            r"CREATE TEMPORARY TABLE payment (
                customer_id int not null,
                amount int not null,
                account_name text
            )"
        )
    }).and_then(|conn| {
        // Save payments
        let params = payments.iter().map(|payment| {
            params! {
                "customer_id" => payment.customer_id,
                "amount" => payment.amount,
                "account_name" => payment.account_name.clone(),
            }
        }).collect();

        conn.batch_exec(r"INSERT INTO payment (customer_id, amount, account_name)
                        VALUES (:customer_id, :amount, :account_name)", params)
    }).and_then(|conn| {
        // Load payments from database.
        conn.prep_exec("SELECT customer_id, amount, account_name FROM payment", ())
    }).and_then(|result| {
        // Collect payments
        result.map_and_drop(|row| {
            let (customer_id, amount, account_name) = my::from_row(row);
            Payment {
                customer_id: customer_id,
                amount: amount,
                account_name: account_name,
            }
        })
    }).and_then(|(_ /* conn */, payments)| {
        // The destructor of a connection will return it to the pool,
        // but pool should be disconnected explicitly because it's
        // an asynchronous procedure.
        pool.disconnect().map(|_| payments)
    });

    let loaded_payments = lp.run(future).unwrap();

    assert_eq!(loaded_payments, payments);
}

Reexports

pub extern crate chrono;

pub extern crate time;

Modules

consts	Mysql constants
errors	Errors used in this crate
prelude	Traits used in this crate

Macros

params

This macro allows you to pass named params to a prepared statement.

Structs

Column	Mysql column.
Conn	Mysql connection
Deserialized	Use it to parse T: Deserialize from Value.
ErrPacket	MySql error packet.
Opts	Mysql connection options.
OptsBuilder	Provides a way to build Opts.
Pool	Asynchronous pool of MySql connections.
QueryResult	Result of a query or statement execution.
Row	Row of a result set.
Serialized	Use it to pass T: Serialize as JSON to a prepared statement.
Transaction	This struct represents MySql transaction.
TransactionOptions	Options for transaction
WhiteListFsLocalInfileHandler	Handles local infile requests from filesystem using explicit path white list.

Enums

IsolationLevel	Transaction isolation level.
Params	Parameters of a statement.
Value	Value of a MySql column.

Functions

from_row	Will panic if could not convert row to T.
from_row_opt	Will return Err(row) if could not convert row to T
from_value	Will panic if could not convert v to T
from_value_opt	Will return Err(v) if could not convert v to T

Type Definitions

BoxFuture