[英]Mongoose batch insert to sub-category
我有一个数组,我想在mongodb中插入数据。
这是我当前的代码:
var mongoose = require('mongoose');
mongoose.connect('mongodb://localhost/xyz')
var countrySchema = mongoose.Schema({
countryName {
countryCode: String,
Regions: {
regionName: {
regionCode: String
}
}
}
});
// schema doesn't seem to matter.
var Country = mongoose.model('Country', countrySchema)
var foo = [["Afghanistan","AF","Badakhshan~BDS|Badghis~BDG|Baghlan~BGL|Balkh~BAL|Bamyan~BAM|Daykundi~DAY|Farah~FRA|Faryab~FYB|Ghazni~GHA|Ghor~GHO|Helmand~HEL|Herat~HER|Jowzjan~JOW|Kabul~KAB|Kandahar~KAN|Kapisa~KAP|Khost~KHO|Kunar~KNR|Kunduz~KDZ|Laghman~LAG|Logar~LOW|Maidan Wardak~WAR|Nangarhar~NAN|Nimruz~NIM|Nuristan~NUR|Paktia~PIA|Paktika~PKA|Panjshir~PAN|Parwan~PAR|Samangan~SAM|Sar-e Pol~SAR|Takhar~TAK|Urozgan~ORU|Zabul~ZAB"]];
// foo is just a small sample, it's only the first element of the complete array.
var countriesArray = foo.map(function(value) {
var country = {};
value[0] = value[0].replace(/\./gi, '')
value[1] = value[1].replace(/\./gi, '')
value[2] = value[2].replace(/\./gi, '')
country[value[0]] = {
countryCode: value[1],
Regions: {}
}
if (value[2].match(/\|/gi)) {
value[2].split('|').map(function(currentRegion) {
var regionSplit = currentRegion.split('~');
country[value[0]].Regions[regionSplit[0]] = {
regionCode: regionSplit[1]
}
})
} else if (value[2].match(/\~/gi)) {
var regionSplit = value[2].split('~');
country[value[0]].Regions[regionSplit[0]] = {
regionCode: regionSplit[1]
}
} else {
country[value[0]].Regions[value[2]] = {
regionCode: 'Missing'
}
}
return country;
})
Country.collection.insert(countriesArray, function(err, countriesArray) {
if (err) {
console.log(err)
} else {
console.log('Done')
}
});
显然,这不符合我的意愿,因为循环完成后调用了newCountry.save(),所以它仅从最后一个区域插入信息。 实现将所有区域插入自己国家的最佳方法是什么?
附言:我只需要发生一次,因此内存使用,速度和其他类似的事情都没有关系。
要进行批量插入,您首先必须创建要插入的对象数组。 为此,您可以在foo数组上进行映射,然后一步插入此数组。 这是一些示例代码:
var Country = mongoose.model('Country', countrySchema);
var countries = foo.map(function(value) {
var country = {};
// do something with your array.
return country;
}
Country.collection.insert(countries, function(err, countries) {
console.log('Inserted ', countries.length, ' documents.');
});
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.