在 laravel 5.7 中使用多个数据库时遇到问题？

Question

我在使用 Laravel 5.7 时遇到问题，它无法识别第二个数据库连接。数据库 2 有一个数据库 1 没有的“国家”表。但是laravel坚持连接数据库1。这是错误和实际代码，请帮助！提前致谢

错误

SQLSTATE[42S02]：未找到基表或视图：1146 表 'database_1.countries' 不存在（SQL: select * from countries）

型号

class Country extends Model {

    use SoftDeletes;

    protected $connection = 'mysql_2';
    protected $table      = 'countries';
    protected $fillable = ['...'];

}

控制器/调试器

class CountriesController extends Controller {

    public function index(){

       //  neither works, this

       $countries = DB::connection("mysql_2")->select('select * from countries');

       // or this

       $countries = Country::all();

       dd($countries); --> both give ERROR
}

数据库.PHP

    'default' => env('DB_CONNECTION', 'mysql'),

    'connections' => [

        'mysql' => [
            'driver'        => 'mysql',
            'host'          => env('DB_HOST', '127.0.0.1'),
            'port'          => env('DB_PORT', '3306'),
            'database'      => env('DB_DATABASE', 'database_1'), //forge
            'username'      => env('DB_USERNAME', 'root'), // forge
            'password'      => env('DB_PASSWORD', ''),
             .......
        ],

        'mysql_2' => [
            'driver'        => 'mysql',
            'host'          => env('DB_HOST', '127.0.0.1'),
            'port'          => env('DB_PORT', '3306'),
            'database'      => env('DB_DATABASE', 'database_2'),
            'username'      => env('DB_USERNAME', 'root'),
            'password'      => env('DB_PASSWORD', ''),
            .......
       ],

.ENV 文件

DB_CONNECTION=mysql
DB_HOST=127.0.0.1
DB_PORT=3306
DB_DATABASE=database_1
DB_USERNAME=root
DB_PASSWORD=

DB_CONNECTION=mysql_2
DB_HOST=127.0.0.1
DB_PORT=3306
DB_DATABASE=database_2
DB_USERNAME=root
DB_PASSWORD=

并且缓存已更新：

php 工匠配置：缓存

  Configuration cache cleared!
  Configuration cached successfully!

Answer 1

您可以尝试的另一个过程 -

.env

DB_CONNECTION=mysql
DB_HOST=127.0.0.1
DB_PORT=3306
DB_DATABASE=database_1
DB_USERNAME=root
DB_PASSWORD=

CUSTOM_DATABASE=database_2
CUSTOM_USERNAME=root
CUSTOM_PASSWORD=

database.php

'mysql' => [
        'driver' => 'mysql',
        'url' => env('DATABASE_URL'),
        'host' => env('DB_HOST', '127.0.0.1'),
        'port' => env('DB_PORT', '3306'),
        'database' => env('DB_DATABASE', 'forge'),
        'username' => env('DB_USERNAME', 'forge'),
        'password' => env('DB_PASSWORD', ''),
        ...................................
    ],
'custom' => [
        'driver' => 'mysql',
        'url' => env('DATABASE_URL'),
        'host' => env('DB_HOST', '127.0.0.1'),
        'port' => env('DB_PORT', '3306'),
        'database' => env('CUSTOM_DATABASE', 'forge'),
        'username' => env('CUSTOM_USERNAME', 'forge'),
        'password' => env('CUSTOM_PASSWORD', ''),
        ..........................................
    ],

YourModel.php

protected $connection = 'custom';
protected $fillable = [......];

如果您在模型中使用protected $connection，那么您可以像往常一样使用 eloquent。如果是这样，那么您可以像这样运行您的查询 -

$countries = Country::all();

在您的迁移文件中 -

public function up()
{
    Schema::connection('custom')->create('your-table-name', function (Blueprint $table){
        $table->bigIncrements('id');
        ...........................
        $table->timestamps();
    });
}

Answer 2

在你的 database.php 文件中尝试更改

'mysql_2' => [
            'driver'        => 'mysql',
            'host'          => env('DB_HOST', '127.0.0.1'),
            'port'          => env('DB_PORT', '3306'),
            'database'      => env('DB_DATABASE2', 'database_2'), // THIS IS THE ONE THATS CHANGED
            'username'      => env('DB_USERNAME', 'root'),
            'password'      => env('DB_PASSWORD', ''),
            .......
       ],

.ENV 文件

DB_CONNECTION=mysql
DB_HOST=127.0.0.1
DB_PORT=3306
DB_DATABASE=database_1
DB_USERNAME=root
DB_PASSWORD=

DB_CONNECTION=mysql_2
DB_HOST=127.0.0.1
DB_PORT=3306
DB_DATABASE2=database_2 // We change 'DB_Database' to 'DB_Database2'
DB_USERNAME=root
DB_PASSWORD=