mongoose

Server side pagination with single document string array field

由 放肆的年华 提交于 2020-12-10 07:03:14
问题 I'm trying to figure out how to do server side pagination for a single document that contains a blacklistGroup: [String] field "blacklistGroup": [ "5e99fd3aa506cf570056898d", "5e99fde5a506cf5700568991", "5e99fd64a506cf570056898e", "5e98c950f4fb3f63b4634e30", "5e99fd15a506cf570056898c", "5e99fda5a506cf570056898f", "5e99fdc7a506cf5700568990", "5e99fcf3a506cf570056898b", "5e98e90d85e69146f841d23a", "5e9867ff5e72550988820dd3", "5e98e8e785e69146f841d239" ] I want it to limit 10 at a time. I'm

Server side pagination with single document string array field

由 空扰寡人 提交于 2020-12-10 07:02:12
问题 I'm trying to figure out how to do server side pagination for a single document that contains a blacklistGroup: [String] field "blacklistGroup": [ "5e99fd3aa506cf570056898d", "5e99fde5a506cf5700568991", "5e99fd64a506cf570056898e", "5e98c950f4fb3f63b4634e30", "5e99fd15a506cf570056898c", "5e99fda5a506cf570056898f", "5e99fdc7a506cf5700568990", "5e99fcf3a506cf570056898b", "5e98e90d85e69146f841d23a", "5e9867ff5e72550988820dd3", "5e98e8e785e69146f841d239" ] I want it to limit 10 at a time. I'm

Query specific fields of mongoDB using node.js

由 与世无争的帅哥 提交于 2020-12-09 04:26:04
问题 In the code below the query gives me all the fields. I only want to query _id and serialno. How to go about it. Schema var DataSchema = new Schema({ serialno: String, info: String, active: Boolean, content: String }); Query // Get list of datas exports.index = function(req, res) { Data.find(function (err, data) { if(err) { return handleError(res, err); } return res.json(200, data); }); }; 回答1: If you are using latest nodejs mongodb driver 3.0 or above try this code: Data.find({}).project({

Query specific fields of mongoDB using node.js

由 青春壹個敷衍的年華 提交于 2020-12-09 04:25:15
问题 In the code below the query gives me all the fields. I only want to query _id and serialno. How to go about it. Schema var DataSchema = new Schema({ serialno: String, info: String, active: Boolean, content: String }); Query // Get list of datas exports.index = function(req, res) { Data.find(function (err, data) { if(err) { return handleError(res, err); } return res.json(200, data); }); }; 回答1: If you are using latest nodejs mongodb driver 3.0 or above try this code: Data.find({}).project({

Cant get mongoose-unique-validator to work

由 本小妞迷上赌 提交于 2020-12-08 07:07:23
问题 it cant be that difficult, but I'm always getting the default mongoose 11000 error. Here is a simplified version of my code: model import mongoose from 'mongoose'; import uniqueValidator from 'mongoose-unique-validator'; const UserSchema = new mongoose.Schema({ email: { type: String, index: true, trim: true, unique: true, uniqueCaseInsensitive: true, required: true } }); UserSchema.plugin(uniqueValidator); controller var data = {email: 'info@foobar.com'}; var user = new User(data); user.save

findOneAndUpdate is not a function [duplicate]

由 旧巷老猫 提交于 2020-12-05 07:24:20
问题 This question already has answers here : findAndModify or findOneAndUpdate - “is not a function” (2 answers) Closed 3 years ago . I've spent all morning googling this, and trying various fixes but I cannot figure it out. I keep getting the error "TypeError: req.user.findOneAndUpdate is not a function" when I try to run this: req.user.findOneAndUpdate({_id: req.user._id}, { $addToSet: { flashcards : { $each: cards }}}, {upsert : true}, function(err, doc) { if(err) return console.log(err); res

Mongoose: check if object is mongoose object

由 最后都变了- 提交于 2020-12-02 02:16:39
问题 anyone know what the simplest way to check whether an object is a mongoose object? Am I just best checking if toObject() is defined or is there a more efficient way. many thanks 回答1: You can check the object's prototype via the instanceof operator to confirm it's an instance of your mongoose model. Using the example schema from mongoosejs.com: if (obj instanceof Cat) { // yes, it's a mongoose Cat model object ... } 回答2: I'm using this if (object.constructor.name === 'model') { // object is

When exactly does Mongoose's .pre('init') get called?

由 佐手、 提交于 2020-12-01 12:15:04
问题 I want to create 'games' which each have their own unique access 'code'. The code is required in the schema, and I need to generate a code each time a new game is created. I thought schema.pre('init') would be a good place to generate this access code: GameSchema.pre('init', function(next) { // Code generation logic happens here this.code = myNewlyGeneratedCode next() } Unfortunately, this returns an error message: ValidationError: Game validation failed: code: Path 'code' is required. Why

When exactly does Mongoose's .pre('init') get called?

由 老子叫甜甜 提交于 2020-12-01 12:14:10
问题 I want to create 'games' which each have their own unique access 'code'. The code is required in the schema, and I need to generate a code each time a new game is created. I thought schema.pre('init') would be a good place to generate this access code: GameSchema.pre('init', function(next) { // Code generation logic happens here this.code = myNewlyGeneratedCode next() } Unfortunately, this returns an error message: ValidationError: Game validation failed: code: Path 'code' is required. Why

[转] 深入浅出mongoose-----包括mongoose基本所有操作,非常实用!!!!!

由 偶尔善良 提交于 2020-11-30 23:38:31
深入浅出mongoose mongoose是nodeJS提供连接 mongodb的一个库. 此外还有mongoskin, mongodb(mongodb官方出品). 本人,还是比较青睐mongoose的, 因为他遵循的是一种, 模板式方法, 能够对你输入的数据进行自动处理. 有兴趣的同学可以去 Mongoose官网 看看. 初入mongoose install mongoose I’ve said that. 使用mongoose你需要有 nodeJS和mongodb数据库. 这两个东西, 前端宝宝们应该很清楚了》 下载mongoose: npm install mongoose --save connect mongoose 下载好数据库之后,我们 来碰碰运气, 看你能不能连接上database. 首先,打开你的mongodb; mongod; //这里我已经将mongodb放在环境变量中了 数据库成功打开后: 在js文件中写入: 'use strict'; const mongoose = require( 'mongoose'); mongoose.connect( 'mongodb://localhost:27017/test'); const con = mongoose.connection; con.on( 'error', console.error.bind(
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