相关疑难解决方法(0)

我只是想让一个简单的near查询工作.这是我的文档样本.

{"point": 
  {"type": "Point", 
     "coordinates": [30.443902444762696, -84.27326978424058]}, 
   "created_on": {"$date": 1398016710168}, 
   "radius": 180, 
   "user": {"$oid": "53543188eebc5c0cc416b77c"}, 
   "_id": {"$oid": "53544306eebc5c0ecac6cfba"}, 
   "expires_on": {"$date": 1399831110168}
}

和mongod我尝试了命令:

db.bar.find({point: {$near: [-84.26060492426588, 30.45023887165371]}});

但我得到这个错误:

错误:{"$ err":"无法执行查询:错误处理查询:ns = foo.bar skip = 0 \nTree:GEONEAR field = point maxdist = 1.79769e + 308 isNearSphere = 0 || First:notFirst:full path :point \nSort:{} \nProj:{} \n planner返回错误:无法找到$ geoNear查询的索引","代码":17007}

也许我的谷歌今天不是那么尖锐,但我找不到任何东西.另外,我运行了ensure index命令.我的意图是这些是地图位置.

db.bar.ensureIndex({a:1});
db.bar.ensureIndex({geo:"2d"});