baoshi-was/database/migrations/2021_05_19_172118_create_storages_table.php

<?php

use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;

class CreateStoragesTable extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('storages', function (Blueprint $table) {
            $table->id();
            $table->bigInteger("material_box_id")->index()->comment("外键料箱");
            $table->bigInteger("commodity_id")->nullable()->index()->comment("外键商品");
            $table->integer("amount")->default(0)->comment("数量");
            $table->timestamps();
        });
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        Schema::dropIfExists('storages');
    }
}