如何使用Laravel IoC将数据库注入构造函数 [英] How to inject Database into constructor with Laravel IoC

问题描述

我想使用DB类与IoC容器进行交易.

I want to use DB class for transaction with IoC Container.

use Illuminate\Database\Connection as DB;
public function __construct(DB $db)
{
    $this->db = $db;
}

但是当使用db类时，出现了错误.

But when use db class,i got an error.

Unresolvable dependency resolving [Parameter #0 [ <required> $dsn ]] in class PDO

我知道，必须绑定一些东西，但我不知道是什么?

I know, must bind something but i don't know what?

推荐答案

您需要更改

use Illuminate\Database\Connection as DB;

进入

use Illuminate\Database\DatabaseManager as DB;

我认为您可以在此处使用DB门面，但实际上您不能.您需要在此处明确传递立面后面的类，以查看 http://laravel .com/docs/4.2/facades#facade-class-reference

I thought you can use DB facade here but in fact you can't. You need to explicitly pass here class that is behind the facade looking at http://laravel.com/docs/4.2/facades#facade-class-reference

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