Laravel-如何与从数据库建立数据库连接

Question

作为上面的标题，我需要连接到从属数据库（出于某种原因）...

但是我找不到如何做？

。

下面是我的数据库配置：

'mysql' => [
    'read' => [
        'host' => env('DB_SLAVE', '127.0.0.1'),
        'port' => env('DB_SLAVE_PORT', '3306'),
        'username'  => env('DB_SLAVE_USERNAME', 'root'),
        'password'  => env('DB_SLAVE_PASSWORD', 'pwdforslave'),
    ],
    'write' => [
        'host' => env('DB_MASTER', '127.0.0.1'),
        'port' => env('DB_MASTER_PORT', '3308'),
        'username'  => env('DB_MASTER_USERNAME', 'masteruser'),
        'password'  => env('DB_MASTER_PASSWORD', 'pwdformaster'),
    ],
    'driver'    => 'mysql',
    'database'  => 'amazingapp',
    'charset'   => 'utf8',
    'collation' => 'utf8_unicode_ci',
    'prefix'    => 'aa_',
    'strict' => false,
    'engine' => env('DB_ENGINE', 'InnoDB'),
    'unix_socket' => env('DB_SOCKET', ''),
],  

。

要与从属DB建立连接，目前我在想的是DB::connection('mysql.slave');

但是它不起作用..

Answer 1

您的意思是在database.php中创建新的数据库连接条目，并通过DB::connection('mysql2')与统计方法连接？

也许您可以检查此链接Laravel Multiple Database

。

可以尝试此配置

'mysql' => [
    'read' => [
        'host' => env('DB_SLAVE', '127.0.0.1'),
        'port' => env('DB_SLAVE_PORT', '3306'),
        'username'  => env('DB_SLAVE_USERNAME', 'root'),
        'password'  => env('DB_SLAVE_PASSWORD', 'pwdforslave'),
    ],
    'write' => [
        'host' => env('DB_MASTER', '127.0.0.1'),
        'port' => env('DB_MASTER_PORT', '3308'),
        'username'  => env('DB_MASTER_USERNAME', 'masteruser'),
        'password'  => env('DB_MASTER_PASSWORD', 'pwdformaster'),
    ],
    'driver'    => 'mysql',
    'database'  => 'amazingapp',
    'charset'   => 'utf8',
    'collation' => 'utf8_unicode_ci',
    'prefix'    => 'aa_',
    'strict' => false,
    'engine' => env('DB_ENGINE', 'InnoDB'),
    'unix_socket' => env('DB_SOCKET', ''),
],  

'mysql_master' => [
    'host' => env('DB_MASTER', '127.0.0.1'),
    'port' => env('DB_MASTER_PORT', '3308'),
    'username'  => env('DB_MASTER_USERNAME', 'masteruser'),
    'password'  => env('DB_MASTER_PASSWORD', 'pwdformaster'),
    'driver'    => 'mysql',
    'database'  => 'amazingapp',
    'charset'   => 'utf8',
    'collation' => 'utf8_unicode_ci',
    'prefix'    => 'aa_',
    'strict' => false,
    'engine' => env('DB_ENGINE', 'InnoDB'),
    'unix_socket' => env('DB_SOCKET', ''),
],  

'mysql_slave' => [
    'host' => env('DB_SLAVE', '127.0.0.1'),
    'port' => env('DB_SLAVE_PORT', '3306'),
    'username'  => env('DB_SLAVE_USERNAME', 'slaveuser'),
    'password'  => env('DB_SLAVE_PASSWORD', 'pwdforslave'),
    'driver'    => 'mysql',
    'database'  => 'amazingapp',
    'charset'   => 'utf8',
    'collation' => 'utf8_unicode_ci',
    'prefix'    => 'aa_',
    'strict' => false,
    'engine' => env('DB_ENGINE', 'InnoDB'),
    'unix_socket' => env('DB_SOCKET', ''),
],  

。

因此，如果要连接到从站，只需使用DB::connection('mysql_slave');

Answer 2

您可以在DB上进行多个.env连接，而无需触摸database.php

这是我连接多个数据库连接的方式

 DB_CONNECTION=mysql
 DB_HOST=localhost
 DB_PORT=3306
 DB_DATABASE=sample
 DB_USERNAME=root
 DB_PASSWORD=123456


 DB_CONNECTION=mysql1
 DB_HOST=localhost
 DB_PORT=3306
 DB_DATABASE=sample
 DB_USERNAME=root
 DB_PASSWORD=123456

以及当您想按protrafree所述在您的代码上调用它时>

这样的东西

  DB::connection('mysql')
或

   DB::connection('mysql1')