hyperf/docs/en/db/db.md

Minimalist DB component

hyperf/database The function is very powerful, but it is undeniable that the efficiency is indeed a little insufficient. Here is a minimalist hyperf/db component that supports PDO and Swoole Mysql.

Install

composer require hyperf/db

Publish component configuration

The configuration file for this component is located at config/autoload/db.php. If the file does not exist, you can publish the configuration file to the skeleton with the following command:

php bin/hyperf.php vendor:publish hyperf/db

Component configuration

The default configuration config/autoload/db.php is as follows, the database supports multi-database configuration, the default is default.

configuration item	type	default	remark
driver	string	none	The database engine supports pdo and mysql
host	string	localhost	database address
port	int	3306	database address
database	string	none	Database default DB
username	string	none	database username
password	string	null	database password
charset	string	utf8	database charset
collation	string	utf8_unicode_ci	database collation
fetch_mode	int	PDO::FETCH_ASSOC	PDO Query result set type
pool.min_connections	int	1	The minimum number of connections in the connection pool
pool.max_connections	int	10	The maximum number of connections in the connection pool
pool.connect_timeout	float	10.0	connection wait timeout
pool.wait_timeout	float	3.0	overtime time
pool.heartbeat	int	-1	heartbeat
pool.max_idle_time	float	60.0	maximum idle time
options	array		PDO configure

Component supported methods

The specific interface can be viewed Hyperf\DB\ConnectionInterface。

method name	return value	remark
beginTransaction	void	Open transaction (Support transaction nesting)
commit	void	Commit transaction (Support transaction nesting
rollBack	void	Rollback transaction (Support transaction nesting)
insert	int	Insert data, return the primary key ID, non-auto-incrementing primary key returns 0
execute	int	Execute SQL to return the number of rows affected
query	array	Query SQL, return a list of result sets
fetch	array, object	Query SQL to return the first row of the result set
connection	self	Specify the database to connect to

Use

Use DB instance

<?php

use Hyperf\Utils\ApplicationContext;
use Hyperf\DB\DB;

$db = ApplicationContext::getContainer()->get(DB::class);

$res = $db->query('SELECT * FROM `user` WHERE gender = ?;', [1]);

Use static methods

<?php

use Hyperf\DB\DB;

$res = DB::query('SELECT * FROM `user` WHERE gender = ?;', [1]);

Custom methods using anonymous functions

This method allows users to directly operate the underlying PDO or MySQL, so you need to deal with compatibility issues yourself

For example, if we want to execute certain queries and use different fetch mode, we can customize our own methods in the following ways

<?php
use Hyperf\DB\DB;

$sql = 'SELECT * FROM `user` WHERE id = ?;';
$bindings = [2];
$mode = \PDO::FETCH_OBJ;
$res = DB::run(function (\PDO $pdo) use ($sql, $bindings, $mode) {
    $statement = $pdo->prepare($sql);

    $this->bindValues($statement, $bindings);

    $statement->execute();

    return $statement->fetchAll($mode);
});