<?php
 use Illuminate\Database\Schema\Blueprint; use Illuminate\Database\Migrations\Migration; class CreateQuestionTagGroup extends Migration { public function up() { Schema::create('question_tag_group', function (Blueprint $table) { $table->increments('id'); $table->timestamps(); $table->string('title', 100)->nullable()->comment('名称'); $table->integer('pid')->nullable()->comment('上级分类'); $table->integer('sort')->nullable()->comment('排序'); $table->index(['pid']); }); } public function down() { } } 