使用laravel框架的eloquent\DB模型连接多个数据库

1、配置.env文件

DB_HOST_TRAILER=127.0.0.1

DB_PORT_TRAILER=3306

DB_DATABASE_TRAILER=htms_trailer

DB_USERNAME_TRAILER=root

DB_PASSWORD_TRAILER=

DB_HOST_FREIGHT=127.0.0.1

DB_PORT_FREIGHT=3306

DB_DATABASE_FREIGHT=hangli_saas

DB_USERNAME_FREIGHT=root

DB_PASSWORD_FREIGHT=

2、配置config/database.php

'mysql_freight' => ['driver' => 'mysql','host'=> env('DB_HOST_FREIGHT', 'localhost'),'database' => env('DB_DATABASE_FREIGHT', 'forge'),'username' => env('DB_USERNAME_FREIGHT', 'forge'),'password' => env('DB_PASSWORD_FREIGHT', ''),'charset' => 'utf8','collation' => 'utf8_unicode_ci','prefix' => '','strict' => false,'engine' => null,],'mysql_trailer' => ['driver' => 'mysql','host'=> env('DB_HOST_TRAILER', 'localhost'),'database' => env('DB_DATABASE_TRAILER', 'forge'),'username' => env('DB_USERNAME_TRAILER', 'forge'),'password' => env('DB_PASSWORD_TRAILER', ''),'charset' => 'utf8','collation' => 'utf8_unicode_ci','prefix' => '','strict' => false,'engine' => null,],

3、修改model

//添加protected $connection = 'mysql_freight';

//若使用DB

$count=DB::connection('mysql_freight')->table($this->table_name)->count();