在本章中將執行Laravel 8連接多數據庫操作。我們將在.env文件上添加數據庫連接配置。
設置 env變量:
在這裏,需要在.env文件上設置配置變量。
.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變量:
現在,當我們在env文件中創建變量時,我們需要在配置文件上使用該變量,因此讓我們打開database.php文件並添加新的連接信息:
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,
],
.....
使用數據庫多個連接:
在這裏,我將爲您提供如何用作多個連接的簡單示例:
數據庫連接與遷移:
<?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();
});
}
.....
數據庫連接模型
<?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';
}
控制器中的數據庫連接
默認:
<?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;
}
}
數據庫連接查詢構建器
默認:
$blogs = DB::table("blog")->get();
print_r($blogs);
第二:
$blogs = DB::connection('mysql2')->table("blog")->get();
print_r($blogs);
https://www.learnfk.com/article-laravel-8-multiple-database-connection-exampleexample