我尝试了很多方法，但是没有任何效果。我需要向表daily_deals_products添加一个组合键。是在laravel和mysql中开发的。
<?php
use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;
class CreateDailyDealsProductsTable extends Migration
{
/**
* Run the migrations.
*
* @return void
*/
public function up()
{
Schema::create('daily__deals__products', function (Blueprint $table) {
$table->bigIncrements('id');
$table->integer('product_id');
$table->timestamps();
});
}
/**
* Reverse the migrations.
*
* @return void
*/
public function down()
{
Schema::dropIfExists('daily__deals__products');
}
}
Schema::create("daily__deals__products", function($table) {
$table->increments('id');
$table->integer('product_id');
$table->string('name');
});
DB::unprepared('ALTER TABLE `daily__deals__products` DROP PRIMARY KEY, ADD PRIMARY KEY ( `id` , `product_id` )');
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我来说两句