cssd-back/database/migrations/2019_04_11_105057_create_inputs_table.php

<?php

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

class CreateInputsTable extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('inputs', function (Blueprint $table) {
            $table->bigIncrements('id');
            $table->string('name');
            $table->string('type');
            $table->unsignedBigInteger('test_type_id');
            $table->foreign('test_type_id')->references('id')->on('test_types');
            $table->unsignedBigInteger('parent_id')->nullable();
            $table->foreign('parent_id')->references('id')->on('inputs');
            $table->string('size');
            $table->string('value');
            $table->timestamps();
        });
    }

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