MongoDB 更新查询以将现有字段设置到数组中

Question

我有以下 mongo 子文档


"location" : {
        "zipCode" : "90670",
        "lat" : "33.942669",
        "lng" : "-118.074384",
        "city" : "Santa Fe Springs",
        "state" : "California",
        "streetAddress" : "12131 Telegraph Road, 2nd Floor",
    }

有人可以建议我 mongo 更新查询或节点函数以获取以下文档


"location" : {
        "zipCode" : "90670",
        "city" : "Santa Fe Springs",
        "state" : "California",
        "streetAddress" : "12131 Telegraph Road, 2nd Floor",
        "geo" : {
            "type" : "Point",
            "coordinates" : [ 33.942669 ,-118.074384 ]
        }
    }

Answer 1

你可以这样做：

var query = {
   "zipCode" : "90670",
   "city" : "Santa Fe Springs",
   "state" : "California",
   "streetAddress" : "12131 Telegraph Road, 2nd Floor"
};

var operator = {
   $unset: {
    "lat" : "",
    "lng" : ""
   },
   $set: {
      "geo" : {
        "type" : "Point",
        "coordinates" : [ 33.942669 ,-118.074384 ]
      }
   }       
};

var options = {
  multi: true
}

db.yourCollection.update(query, operator, options);

这将影响所有与查询确实匹配的记录。

Answer 2

此更改不能在一次操作中完成。您需要先获取需要更改的文档，然后使用新格式更新文档。

Answer 3

如果您使用 node.js mongodb 驱动程序，您可以执行以下操作：

var firstQuery = {


"zipCode" : "90670",
   "city" : "Santa Fe Springs",
   "state" : "California",
   "streetAddress" : "12131 Telegraph Road, 2nd Floor"
};

db.collection('yourCollection').find(firstQuery).toArray(function(err, results) {
    if (err) return err;
    results.forEach(function(record) {
        var geo = {
            "type" : "Point",
      "coordinates" : [ record.lat ,record.lng ]
        };

        var newRecord  = {
            zipCode: record.zipCode,
            city: record.city,
            state: record.state,
            streetAddress: record.streetAddres,
            geo: geo
        };

        db.collection('yourCollection').update(record, newRecord, function(err) {
            if(err) {
                //do whatever you want with this
            }
        }); 
    });
});

MongoDB 更新查询以将现有字段设置到数组中

MongoDB update query to set existing field into array

node.js

mongodb

node-mongodb-native