Question

我在Laravel 5.7上遇到问题，它无法识别第二个数据库连接。数据库2有一个“国家”表，而数据库1没有。但是laravel坚持与连接数据库1。这是错误和实际代码，请帮忙！预先感谢

错误

SQLSTATE [42S02]：未找到基表或视图：1146表 'database_1.countries'不存在（SQL：从国家/地区中选择*）

模型

class Country extends Model {

    use SoftDeletes;

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

}

CONTROLLER / DEBUGGINB

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
}

DATABASE.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CACHE已更新：

php artisan config：cache

  Configuration cache cleared!
  Configuration cached successfully!

Answer 1

在您的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=

Answer 2

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 = [......];

如果在模型中使用protected $connection，则可以照常使用雄辩的语言。如果是这样，则可以这样运行查询-

$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();
    });
}

在laravel 5.7中使用多个数据库有麻烦吗？

2 个答案: