我正在使用。
我有以下模式:
var mongoose = require('mongoose');
var User = require('./User');
var TicketSchema = new mongoose.Schema({
user : { type: mongoose.Schema.Types.ObjectId, ref: 'User', required: true },
},
{
timestamps: true
});
var DrawSchema = new mongoose.Schema({
基本上,我试着在一个使用Node.js和Mongoose的小应用程序中,根据特定电影标题的评论,从5项中找出平均评分。
电影模式:
var mongoose = require("mongoose");
//SCHEMA SET UP
var movieSchema = new mongoose.Schema({
title: String,
director: String,
year: Number,
comments:[
{
type: mongoose.Schema.Types.ObjectId,
我有nodejs/mongodb和猫鼬设置。一切都是最后的版本。
我在NOSQL中有点“全新”,并试图用这样的SQL查询来重写NOSQL和mongoose:
select * from documents where count(select * from subdocuments where subdocuments.documentId = documents.id) = 5 order by documents.id desc limit 1
在我的例子中(嵌套集合),主要的集合结构是:
documents: [{
_id: ObjectId
s
猫鼬的工作效果很好。但是,有人可以使用填充来通过另一个不是_Id的属性来提取文档吗?
例如,注释模式:
var CommentSchema = new Schema({
_id:Auto Generated
postId:1,
userId:411,
comment:'This is a comment',
// Would want to fetch Like via the userId not likes _id
likes: {
type:mongoose.Schema.Types.ObjectId, // This will have
我有两个猫鼬收藏品: ExpenseCategory和费用
var ExpenseCategorySchema = new Schema({
name: String,
totalSpentInThisMonth: Number
});
mongoose.model('ExpenseCategory', ExpenseCategorySchema);
var ExpenseSchema = new Schema({
expenseCategoryId: {type: Schema.Types.ObjectId, ref: 'ExpenseCat
似乎有很多关于堆叠溢出的问题,但我似乎在任何地方都找不到确切的答案。
我拥有的:
我有公司和个人模特:
var mongoose = require('mongoose');
var PersonSchema = new mongoose.Schema{
name: String,
lastname: String};
// company has a reference to Person
var CompanySchema = new mongoose.Schema{
我试图显示其他用户发送给用户的最新消息。
所以如果,
User A sends Message 1 to User B,
User A sends Message 2 to User B,
User B sends Message 3 to User A,
User A sends Message 4 to User B,
User C sends Message 5 to User B
如果我是用户B,查看我的收件箱,只从用户A返回消息4给用户B,从用户C返回消息5到用户B。
我该怎么做?到目前为止我已经尝试过:
const messages = await Conversation
我有两个模式:
module.exports = mongoose.model('Article', {
title : String,
text : String,
lang : { type: String, default: 'en'},
user : { type : mongoose.Schema.Types.ObjectId, ref: 'User' },
});
var userSchema = mongoose.Schema({
email : String,
name : String,
ra