在本章中将执行Laravel 8连接多数据库操作。我们将在.env文件上添加数据库连接配置。
设置 env变量:
在这里,需要在.env文件上设置配置变量。
.env
DB_CONNECTION=mysql
DB_HOST=127.0.0.1
DB_PORT=3306
DB_DATABASE=mydatabase
DB_USERNAME=root
DB_PASSWORD=root
DB_CONNECTION_SECOND=mysql
DB_HOST_SECOND=127.0.0.1
DB_PORT_SECOND=3306
DB_DATABASE_SECOND=mydatabase2
DB_USERNAME_SECOND=root
DB_PASSWORD_SECOND=root
使用env变量:
现在,当我们在env文件中创建变量时,我们需要在配置文件上使用该变量,因此让我们打开database.php文件并添加新的连接信息:
config/database.php
<?php
use Illuminate\Support\Str;
return [
'default' => env('DB_CONNECTION', 'mysql'),
'connections' => [
.....
'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', ''),
'unix_socket' => env('DB_SOCKET', ''),
'charset' => 'utf8mb4',
'collation' => 'utf8mb4_unicode_ci',
'prefix' => '',
'prefix_indexes' => true,
'strict' => true,
'engine' => null,
'options' => extension_loaded('pdo_mysql') ? array_filter([
PDO::MYSQL_ATTR_SSL_CA => env('MYSQL_ATTR_SSL_CA'),
]) : [],
],
'mysql2' => [
'driver' => env('DB_CONNECTION_SECOND'),
'host' => env('DB_HOST_SECOND', '127.0.0.1'),
'port' => env('DB_PORT_SECOND', '3306'),
'database' => env('DB_DATABASE_SECOND', 'forge'),
'username' => env('DB_USERNAME_SECOND', 'forge'),
'password' => env('DB_PASSWORD_SECOND', ''),
'unix_socket' => '',
'charset' => 'utf8mb4',
'collation' => 'utf8mb4_unicode_ci',
'prefix' => '',
'prefix_indexes' => true,
'strict' => true,
'engine' => null,
],
.....
使用数据库多个连接:
在这里,我将为您提供如何用作多个连接的简单示例:
数据库连接与迁移:
<?php
.....
public function up()
{
Schema::create('blog', function (Blueprint $table) {
$table->increments('id');
$table->string('title');
$table->string('body')->nullable();
$table->timestamps();
});
}
.....
第二:
<?php
.....
public function up()
{
Schema::connection('mysql2')->create('blog', function (Blueprint $table) {
$table->increments('id');
$table->string('title');
$table->string('body')->nullable();
$table->timestamps();
});
}
.....
数据库连接模型
<?php
namespace App;
use Illuminate\Database\Eloquent\Model;
class Blog extends Model
{
}
第二:
<?php
namespace App;
use Illuminate\Database\Eloquent\Model;
class Blog extends Model
{
protected $connection = 'mysql2';
}
控制器中的数据库连接
默认:
<?php
class BlogController extends BaseController
{
public function getRecord()
{
$blogModel = new Blog;
$find = $blogModel->find(1);
return $find;
}
}
第二:
<?php
class BlogController extends BaseController
{
public function getRecord()
{
$blogModel = new Blog;
$blogModel->setConnection('mysql2');
$find = $blogModel->find(1);
return $find;
}
}
数据库连接查询构建器
默认:
$blogs = DB::table("blog")->get();
print_r($blogs);
第二:
$blogs = DB::connection('mysql2')->table("blog")->get();
print_r($blogs);
https://www.learnfk.com/article-laravel-8-multiple-database-connection-exampleexample