laravel做数据迁移的时候进行表的注释

只需要加以据alter语句即可：

  public function up()
    {
        $tableName = 'xxx';
        Schema::create($tableName, function (Blueprint $table) {
            $table->increments('id');
            $table->timestamps();
        });

       DB::statement("ALTER TABLE $tableName comment '这是注释'");
    }