居住在猫鼬 [英] Populate in Mongoose

问题描述

我需要一些帮助来使用 mongoose 填充子文档，我在互联网上搜索了很多，但没有找到解决问题的方法.

I need some help to populate on sub-document with mongoose, I searched a lot in the internet , but didn't find a way to fix my problem.

我有两个架构:1 - 基础设施

I heve two schema : 1 - InfraServer

  var InfraServerSchema = new Schema({
    _id : String,
    equipe : String,
    servidor : String,
    memoria : String,
    processador : String,
    modelo : String,
    so : String,
    usuario : String
},{ collection: 'infraserver' });

var InfraServer = mongoose.model('InfraServer', InfraServerSchema);
module.exports = InfraServer;

2 - 基础设施数据库

2 - InfraDataBase

var InfraDataBaseSchema = new Schema({
    _id : String,
    equipe : String,
    nome_base : String,
    vipname : String,
    tipo_banco : String,
    versao: String,
    servidores :  [{ type : mongoose.Schema.Types.ObjectId, ref: 'InfraServer' }],
    tnsnames : String
},{ collection: 'infradatabase' });

var InfraDataBase = mongoose.model('InfraDataBase', InfraDataBaseSchema);
module.exports = InfraDataBase;

我正在尝试在路由文件夹中填充如下所示的数组 servidores，但是当我打印种子变量时，数组返回空，并且需要 servidores.servidor(InfraServer 中的字段)、servidores._id 正确填充.

I'm trying to populate the array servidores like below, in routes folder, but when I print seeds variable, the array return empty, and need the servidores.servidor (field in InfraServer), servidores._id are populate correctly.

InfraDataBase.find().where('equipe').in(req.session.userInf.equipe).populate('servidores').exec(function(err, seeds){

  if( err || !seeds) console.log("No seeds found");
          else 
        {
            console.log("--->>> " + seeds);

  }

可以帮我找到解决这个问题的方法.

Can help me find a way to resolve this problem .

谢谢

推荐答案

尝试将 _id 的 SchemaType 更改为 ObjectId.

Try changing the SchemaType of the _id to ObjectId.

_id : ObjectId

此外，您不需要显式声明 _id 字段.它是为所有 Mongoose 模式自动创建的.

Besides, you don't need to explicitly declare the _id field. It is automatically created for all Mongoose schemas.

这篇关于居住在猫鼬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！