qasystem/database/migrations/2015_10_09_154125_create_answers_table.php

<?php
use Illuminate\Support\Facades\Schema;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Database\Migrations\Migration;

class CreateAnswersTable extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('answers', function (Blueprint $table) {

            $table->increments('id')->unsigned();                             //回答ID

            $table->string('question_title',255);                 //问题标题

            $table->integer('question_id')->unsigned()->default(0)->index();              //问题ID

            $table->integer('user_id')->unsigned()->default(0)->index();                 //回答发起人UID

            $table->text('content');                              //回答内容

            $table->integer('supports')->unsigned()->default(0);              //支持数

            $table->integer('oppositions')->unsigned()->default(0);           //反对数

            $table->integer('comments')->unsigned()->default(0);              //评论数

            $table->tinyInteger('device')->default(1)->comment("设备类型：1web版本，2小程序");            //提问设备类型1pc,2安卓,3IOS,4weixin

            $table->tinyInteger('status')->default(0);            //回答状态0待审核,1已审核

            $table->timestamp('adopted_at')->nullable()->index();             //回答采纳时间

            $table->timestamps();                                 //创建和更新时间

            $table->index('created_at');
            $table->index('updated_at');

        });
    }

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