Model.find不是猫鼬中的函数 [英] Model.find is not a function in mongoose

问题描述

我是node和mongodb的新手.我正在尝试从另一个模型(公司)查询另一个模型(事件).

I am new in node and mongodb. I am trying to query a different model(Event) from another model(Company).

基本上，在 Event 模型中，有一个名为 company 的字段.我想获得ID为事件ID的公司.

Basically in Event model there is a field called company. I would like to get the company where id is an Event ID.

我将所有事件ID放在一个数组中.

I have all the event IDs in an array.

 let eventIds = [ 5b76a8139dc71a4a12564cd2,
  5b9a1685c239342d4635466c,
  5b8e753bdbccf803e906aaeb ]

事件架构-

var EventSchema = new Schema({
        title:{type:String,require:true,index:true},
        description:{type:String,require:false},
        companies:[
            {type:Schema.Types.ObjectId,ref:"Company",require:true,index:true}
        ]
});

在公司模式下-

var mongoose = require('mongoose'),
    Schema = mongoose.Schema,
    Event = require('./event.js');

var CompanySchema = new Schema({
        name:{type:String,require:true,index:true},
        description:{type:String,require:false}},{
        //no auto indexing at the beginning
        autoIndex:true,

        //no strict to save changes in the valuesBeforeChange field.
        strict:false}
);

CompanySchema.static("searchCompanies",function(callback,criteria){

    "use strict";
    var That = this;
    var query = That.find();

    async.waterfall([

         function(callback){
             let eventIds =  [5b76a8139dc71a4a12564cd2,5b9a1685c239342d4635466c,5b8e753bdbccf803e906aaeb ];
             Event.find({ $in: eventIds}, function(err, docs){
                   console.log(docs);
             });
     }

],function(err,companyResultObj){
         callback(err,companyResultObj);
    });
});

我收到 Event.find不是函数错误消息.如何从另一个模型(公司)查询另一个模型(事件)

I am getting Event.find is not a function error message. How can I query a different model(event) from another model(company)

我们非常感谢您的帮助.

Any help is highly appreciated.

推荐答案

不知道为什么，但是我必须按照以下方式进行.

Not sure why but I had to do this in the following way.

Event.find({ $in: eventIds}, function(err, docs){

收件人

mongoose.model('Event').find({_id:eventIds}, function(err, docs){

返回了3个正确的文档.

which returned 3 documents which are correct.

这篇关于Model.find不是猫鼬中的函数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！