baoshi-was/database/migrations/2021_02_25_092328_change_material_suppliers.php

<?php

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

class ChangeMaterialSuppliers extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::dropIfExists('material_supplier');
        Schema::create('material_suppliers', function (Blueprint $table) {
            $table->bigInteger('material_id');
            $table->bigInteger('supplier_id');
        });
    }

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