Forked from kejyun/mongodb_aggregation_lbs_search_orderby_time_limit3.js
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August 29, 2015 14:11
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// 找捷運台北車站附近距離2公里內的捷運站、依照建立時間做排序、找前3筆資料 | |
db.lbs_test.aggregate( | |
{ | |
$geoNear : { | |
near : [25.046084,121.517542], | |
distanceField : "dist", | |
maxDistance : 2 / 111.12 | |
} | |
}, | |
{ | |
$sort : { | |
time : 1 | |
} | |
}, | |
{ | |
$limit : 3 | |
} | |
); | |
// 查詢結果 | |
{ | |
"result" : [ | |
{ | |
"_id" : ObjectId("5238179cdfba7ac818bb5fcd"), | |
"name" : "捷運臺大醫院站", | |
"loc" : { | |
"lat" : 25.041535, | |
"long" : 121.516029 | |
}, | |
"time" : 11, | |
"dist" : 0.004794013975784349 | |
}, | |
{ | |
"_id" : ObjectId("5238179cdfba7ac818bb5fce"), | |
"name" : "捷運中正紀念堂站", | |
"loc" : { | |
"lat" : 25.032922, | |
"long" : 121.518481 | |
}, | |
"time" : 12, | |
"dist" : 0.01319545243635133 | |
}, | |
{ | |
"_id" : ObjectId("5238179cdfba7ac818bb5fd2"), | |
"name" : "捷運中山站", | |
"loc" : { | |
"lat" : 25.052596, | |
"long" : 121.520327 | |
}, | |
"time" : 16, | |
"dist" : 0.0070825397280881355 | |
} | |
], | |
"ok" : 1 | |
} |
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