查找在某个范围内的记录： {"_id":{$in: [a,b,c]}}
如果images是个数组，则查询方式与普通数据一样：{"images":"width"}，
数据如下：
"images" : ["{", "url", "http://60.174.195.182:801/group1/M00/51/5C/rBABzVWSbXeEeGtfAAAAAHykaCg637.png", "width", "269", "height", "202", "}", "{", "url", "http://60.174.195.182:801/group1/M00/51/5C/rBABzVWSbXeEGGN-AAAAAByx1Fg254.png", "width", "269", "height", "202", "}"],
mongo vue的常用操作
原文：http://www.cnblogs.com/yipihema/p/4671214.html
