mongoose save vs insert vs create [英] mongoose save vs insert vs create

问题描述

使用Mongoose将文档（记录）插入MongoDB有哪些不同方法？

我当前的尝试：

var mongoose = require('mongoose');
var Schema = mongoose.Schema;

var notificationsSchema = mongoose.Schema({
    "datetime" : {
        type: Date,
        default: Date.now
    },
    "ownerId":{
        type:String
    },
    "customerId" : {
        type:String
    },
    "title" : {
        type:String
    },
    "message" : {
        type:String
    }
});

var notifications = module.exports = mongoose.model('notifications', notificationsSchema);

module.exports.saveNotification = function(notificationObj, callback){
    //notifications.insert(notificationObj); won't work
    //notifications.save(notificationObj); won't work
    notifications.create(notificationObj); //work but created duplicated document
}

任何想法为什么插入和保存不在我的情况下工作？我试过创建，它插入2个文件而不是1.这很奇怪。

Any idea why insert and save doesn't work in my case? I tried create, it inserted 2 document instead of 1. That's strange.

推荐答案

.save（ ）是模型的实例方法，而 .create（）是直接从模型中调用的作为方法调用，本质上是静态的，并将对象作为第一个参数。

The .save() is an instance method of the model, while the .create() is called directly from the Model as a method call, being static in nature, and takes the object as a first parameter.

var mongoose = require('mongoose');
var Schema = mongoose.Schema;

var notificationSchema = mongoose.Schema({
    "datetime" : {
        type: Date,
        default: Date.now
    },
    "ownerId":{
        type:String
    },
    "customerId" : {
        type:String
    },
    "title" : {
        type:String
    },
    "message" : {
        type:String
    }
});

var Notification = mongoose.model('Notification', notificationsSchema);


function saveNotification1(data) {
    var notification = new Notification(data);
    notification.save(function (err) {
        if (err) return handleError(err);
        // saved!
    })
}

function saveNotification2(data) {
    Notification.create(data, function (err, small) {
    if (err) return handleError(err);
    // saved!
    })
}

导出你想要的任何功能。

Export whatever functions you would want outside.

更多信息，请访问 Mongoose Docs ，或考虑阅读 Model 原型的参考在Mongoose。

More at the Mongoose Docs, or consider reading the reference of the Model prototype in Mongoose.

这篇关于mongoose save vs insert vs create的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！