我如何强制yii2模块为所有他的模型使用特定的连接? [英] How i can force an yii2 module to use a specific connection for all his models?

问题描述

在模块上，我添加了一个名为db的组件，就像主Yii组件一样，用于数据库连接的数据，我需要在模块中每次针对所有模型(而不是主数据库)在其配置中指定的db都使用连接，我该怎么做?

on a module I have add a component named db where i put, like the main Yii component, the data for database connection, I need in my module use everytime the db specified in his configuration for all models and not the main database connection, how I can do this?

推荐答案

您有几种方法，例如在app/config/main.php中使用单独的配置 例如，将特定的dbMyMod添加到组件config

You have several way eg. using a separated configuration in app/config/main.php eg adding a specific dbMyMod to component config

return [
// ...
'components' => [
    // ...
    'db' => [
        'class' => 'yii\db\Connection',
        'dsn' => 'mysql:host=localhost;dbname=example',
        'username' => 'root',
        'password' => '',
        'charset' => 'utf8',
    ],
    'dbMyMod ' => [
        'class' => 'yii\db\Connection',
        'dsn' => 'mysql:host=hostForMudle;dbname=module_db_name',
        'username' => 'user_module_name',
        'password' => 'password',
        'charset' => 'utf8',
    ],

],

或一种不需要在应用程序/配置中进行静态配置的方式

or one way that not require a static configuration in app/confing

可以基于返回正确数据库连接的模块函数

could be based on a module function that return a proper db connection

public function myModuleDbCon()
{
   $myDbCon = new yii\db\Connection([
           'dsn' => 'mysql:host=localhost;dbname=example',
           'username' => 'root',
           'password' => '',
           'charset' => 'utf8',
    ]);
    return myDbConn;

}

然后在您的模块中，您可以检索模块的数据库连接

then in you module you can retrive the module db connection

aDbConn = Yii::$app->getModule('my_module_name')->myModuleClass->myModuleDbCon();

.

 $command = $aDbConn->createCommand('SELECT * FROM myTable');
 $result= $command->queryAll();

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