Question

我正在使用react geosuggest包来保存MongoDB中我的事件的位置。该软件包从Google场所获取数据，每次我存储它时，它都会像这样存储：

"_id": "vvagbSbEginyrQGK8",
"name": "test3",
"googleLocation": {
    "label": "Testaccio, Roma, Italia",
    "placeId": "ChIJE47T5i5gLxMRhiCxCUAFq4Q",
    "isFixture": false,
    "gmaps": {
        "address_components": [
            {
                "long_name": "Monte Testaccio",
                "short_name": "Monte Testaccio",
                "types": [
                    "establishment",
                    "natural_feature"
                ]
            },
            {
                "long_name": "Rome",
                "short_name": "Rome",
                "types": [
                    "locality",
                    "political"
                ]
            },
            {
                "long_name": "Rome",
                "short_name": "Rome",
                "types": [
                    "administrative_area_level_3",
                    "political"
                ]
            },
            {
                "long_name": "Metropolitan City of Rome",
                "short_name": "RM",
                "types": [
                    "administrative_area_level_2",
                    "political"
                ]
            },
            {
                "long_name": "Lazio",
                "short_name": "Lazio",
                "types": [
                    "administrative_area_level_1",
                    "political"
                ]
            },
            {
                "long_name": "Italia",
                "short_name": "IT",
                "types": [
                    "country",
                    "political"
                ]
            },
            {
                "long_name": "00153",
                "short_name": "00153",
                "types": [
                    "postal_code"
                ]
            }
        ],
        "formatted_address": "Monte Testaccio, 00153 Rome, Italia",
        "geometry": {
            "location": {},
            "location_type": "APPROXIMATE",
            "viewport": {
                "f": {
                    "b": 41.87460301970851,
                    "f": 41.87730098029151
                },
                "b": {
                    "b": 12.474345019708494,
                    "f": 12.477042980291571
                }
            }
        },
        "place_id": "ChIJE47T5i5gLxMRhiCxCUAFq4Q",
        "types": [
            "establishment",
            "natural_feature"
        ]
    },
    "location": {
        "lat": 41.87595200000001,
        "lng": 12.475693999999976
    }
}

我已经尝试了很多不同的mongodb查询查询，但我无法弄明白。任何人都知道一个查询，例如根据我发送的经度和纬度查找10000米范围内的所有文件。

Answer 1

根据mongodb的当前版本，它有Gospatial查询运算符，您可以在修改包含以下位置的集合后实现所需：

首先，您应该为集合创建“2dsphere”索引，让我们将其命名为“places”，如下所示：

db.places.createIndex( { loc : "2dsphere" } );
/*
the document should contain "loc" property as following:
{
  loc : { type: "Point", coordinates: [ -73.88, 40.78 ] },
  //+ the other needed properties.
}
*/

然后，对于特定的原点和距离范围，您可以应用以下查询：

db.places.find(
{
   loc:
   { $near :
     {
        $geometry: { type: "Point",  coordinates: [ -73.9667, 40.78 ] 
        //the origin point.
        },
        $minDistance: 1000, //in meter
        $maxDistance: 5000  //in meter
      }
   }
}
)

请注意，坐标的顺序如下[long，lat]。

有关详细信息，您可以在以下链接中查看mongodb文档：

如何根据地理位置查找所有mongoDB文档

1 个答案: