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Ich möchte mehrere Datenbanken in meinem System kombinieren. Meistens handelt es sich bei der Datenbank um MySQL; in Zukunft kann es jedoch anders sein, d. h. der Administrator kann Berichte wie diesen erstellen, was die Quelle für die „Verwendung heterogener Datenbanksysteme“ ist. Meine Frage lautet also:
Bietet Laravel eine Fassade, um mit dieser Situation umzugehen? Oder verfügt ein anderes Framework über Funktionen, die das Problem besser lösen?
P粉9576615442023-10-14 00:28:20
在 Laravel 5.1 中,您指定连接:
$users = DB::connection('foo')->select(...);
默认,Laravel 使用默认连接。很简单,不是吗?
在此处阅读更多信息:http://laravel.com/docs/5.1/database#访问连接
P粉3402642832023-10-14 00:26:49
来自 Laravel 文档:您可以访问每个连接使用多个连接时,通过 DB
外观上的连接方法。传递给连接方法的名称应与 config/database.php
配置文件中列出的连接之一相对应:
$users = DB::connection('foo')->select(...);
DB_CONNECTION=mysql DB_HOST=127.0.0.1 DB_PORT=3306 DB_DATABASE=mysql_database DB_USERNAME=root DB_PASSWORD=secret DB_CONNECTION_PGSQL=pgsql DB_HOST_PGSQL=127.0.0.1 DB_PORT_PGSQL=5432 DB_DATABASE_PGSQL=pgsql_database DB_USERNAME_PGSQL=root DB_PASSWORD_PGSQL=secret
使用config/database.php
'mysql' => [ 'driver' => env('DB_CONNECTION'), 'host' => env('DB_HOST'), 'port' => env('DB_PORT'), 'database' => env('DB_DATABASE'), 'username' => env('DB_USERNAME'), 'password' => env('DB_PASSWORD'), ], 'pgsql' => [ 'driver' => env('DB_CONNECTION_PGSQL'), 'host' => env('DB_HOST_PGSQL'), 'port' => env('DB_PORT_PGSQL'), 'database' => env('DB_DATABASE_PGSQL'), 'username' => env('DB_USERNAME_PGSQL'), 'password' => env('DB_PASSWORD_PGSQL'), ],
app/config/database.php
return array( 'default' => 'mysql', 'connections' => array( # Primary/Default database connection 'mysql' => array( 'driver' => 'mysql', 'host' => '127.0.0.1', 'database' => 'mysql_database', 'username' => 'root', 'password' => 'secret' 'charset' => 'utf8', 'collation' => 'utf8_unicode_ci', 'prefix' => '', ), # Secondary database connection 'pgsql' => [ 'driver' => 'pgsql', 'host' => 'localhost', 'port' => '5432', 'database' => 'pgsql_database', 'username' => 'root', 'password' => 'secret', 'charset' => 'utf8', 'prefix' => '', 'schema' => 'public', ] ), );
运行connection()
方法来指定要使用的连接。
Schema::connection('pgsql')->create('some_table', function($table) { $table->increments('id'): });
或者,在顶部定义一个连接。
protected $connection = 'pgsql';
$users = DB::connection('pgsql')->select(...);
(在 Laravel >= 5.0(或更高版本)中)
在模型中设置$connection
变量
class ModelName extends Model { // extend changed protected $connection = 'pgsql'; }
(在 Laravel <= 4.0(或更低)中)
在模型中设置$connection
变量
class SomeModel extends Eloquent { protected $connection = 'pgsql'; }
DB::transaction(function () { DB::connection('mysql')->table('users')->update(['name' => 'John']); DB::connection('pgsql')->table('orders')->update(['status' => 'shipped']); });
或
DB::connection('mysql')->beginTransaction(); try { DB::connection('mysql')->table('users')->update(['name' => 'John']); DB::connection('pgsql')->beginTransaction(); DB::connection('pgsql')->table('orders')->update(['status' => 'shipped']); DB::connection('pgsql')->commit(); DB::connection('mysql')->commit(); } catch (\Exception $e) { DB::connection('mysql')->rollBack(); DB::connection('pgsql')->rollBack(); throw $e; }
您还可以通过 setConnection
方法或 on
静态方法在运行时定义连接:
class SomeController extends BaseController { public function someMethod() { $someModel = new SomeModel; $someModel->setConnection('pgsql'); // non-static method $something = $someModel->find(1); $something = SomeModel::on('pgsql')->find(1); // static method return $something; } }
测试版本(已更新)
版本 | 已测试(是/否) |
---|---|
4.2 | 否 |
5 | 是(5.5) |
6 | 否 |
7 | 否 |
8 | 是(8.4) |
9 | 是(9.2) |