不带_id的猫鼬数据保存

问题描述

我在node.js应用程序中使用猫鼬.我不想记录_id字段.我正在使用此代码来保存没有_id字段的记录.但这给了错误

I am using mongoose with node.js application. I don't want _id field in record.I am using this code to save my record without _id field. But it is giving error

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

var PlayerSchema = new Schema({
    player_id :  { type: Number },
    player_name : { type: String },
    player_age  : { type: Number },
    player_country : { type: String }
}
, { _id: false }
);

var Player =  mongoose.model('Player', PlayerSchema );

        var athlete = new Player();
        athlete.player_id = 1;
        athlete.player_name = "Vicks";
        athlete.player_age  = 20;
        athlete.player_country = "UK";

        athlete.save(function(err) {
            if (err){
                console.log("Error saving in PlayerSchema"+ err);
            }
        });

我正在使用猫鼬版本3.8.14

I am using mongoose version 3.8.14

推荐答案

不幸的是，您不能跳过拥有文档的主键，但是可以覆盖主键的内容，可以为每个文档定义自己的主键.

Unfortunately, You can not skip having a primary key for the document but you can override the primary key content, you can define your own primary key for each document.

尝试以下模式.

var PlayerSchema = new mongoose.Schema({
_id :  { type: Number },
player_name : { type: String },
player_age  : { type: Number },
player_country : { type: String },

});

我用_id替换了您的player_id.现在，您可以控制文档的主键，并且系统不会为您生成密钥.

I have replaced your player_id with _id. Now you have control over the primary key of the document and the system won't generate the key for you.

有些插件还可以为您的主键执行autoincremet. https://github.com/chevex-archived/mongoose-auto-increment .您也可以尝试这些.

There are some plugins which can also do the autoincremet for your primary key. https://github.com/chevex-archived/mongoose-auto-increment. You might try these as well.

另外，关于您得到的错误:任何文档都是对象，应该包装在curly brackets内，您不能在同一文档中定义两个独立的对象.因此，您会收到此错误.

Also, about the error you are getting :Any document is an object and should be wrapped inside the curly brackets you can not define two independent object in the same document. So you are getting this error.

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