<?php

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

class CreateKeywordsTable extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        if (!Schema::hasTable('keywords')) {
            Schema::create('keywords', function (Blueprint $table) {
                $table->id();
                $table->string('key')->unique();
                $table->string('name')->comment('名字');
                $table->string('value')->nullable();
                $table->string('type_key')->nullable();
                $table->unsignedInteger('sort')->default(0)->comment('排序');
                $table->unsignedBigInteger('parent_id')->default(0)->comment('上级ID');
                $table->unsignedInteger('level')->default(1)->comment('层级');
            });
        }
    }

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