mongoose-schema

问题 I've encountered a strange thing. I have several mongoose models - and in one of them (only in one!) I get this error: TypeError: Schema is not a constructor I find it very strange as I have several working schemas. I tried logging mongoose.Schema in the non-working schema and it is indeed different from the mongoose.Schema in my working schemas - how is that possible? The code is almost identical. Here's the code for the non-working schema: var mongoose = require('mongoose'); var Schema =

问题 I have a use case where the database is modelled like this: name: XYZ gradeCards: [{ id: 1234, // id of the report card comments: ['GOOD','NICE','WOW'] }, { id: 2345, comments: ['GOOD','NICE TRY'] }] Now, I have a query that I would like to query the schema as follows: I would be given a list of ids and values. For example: the given list is as follows: [{ id: 1234, comments: ['GOOD','NICE'] },{ id: 2345, comments: ['GOOD'] }] In short the ID should be matching and the comments should be a

问题 The structure of the project is structure The main file is index.js that is located in the main directory. This one has 'use strict' var mongoose = require('mongoose'); var app = require('./app'); var port = process.env.port || 3000; mongoose.connect('mongodb://localhost:27017/changeProducts',(err,res) =>{ if(err){ throw err; }else{ console.log("Base de datos funcionando correctamente.."); app.listen(port, function(){ console.log('Servidor nodejs corriendo(app.listen)... '); }); } }); The

问题 Mongoose Imagdata.dropIndexes( { "image_id": 1 }, function(err){ if(err){ res.send("error"); } else{ res.send("success"); } }); This is the code I used for remove the index of a field 'image_id'. When I trying to execute this function It shows "TypeError: Imagdata.dropIndexes is not a function". How to fix this issue... 回答1: You need to use the raw collection property of your model to access the underlying MongoDB API: Imagdata.collection.dropIndex(...); 来源： https://stackoverflow.com

问题 Mongoose Schema: new Schema({ ... createDate: { type: Date, default: Date.now }, updateDate: { type: Date, default: Date.now } }); Upsert operation: const upsertDoc = { ... } Model.update({ key: 123 }, upsertDoc, { upsert: true }) when I upsert with update or findOneAndUpdate the default schema values createDate and updateDate are always renewed no matter document is inserted or updated. It's same when I use $set (in which of course I don't pass dates). I don't seem to find anything to tell

问题 I'm trying to add a subdocument to a parent schema with Mongoose and MongoDB however I'm being thrown the following error: TypeError: User is not a constructor This is based off Mongoose's documentation on subdocuments and I think everything is the same. How can I debug this further? Router // Add a destination to the DB router.post('/add', function(req, res, next) { let airport = req.body.destination let month = req.body.month let id = (req.user.id) User.findById(id , function (err, User) {

问题 I am trying to push a value to mongodb collection arrayList (user.completed) but it's not getting updated even though my code seems correct. When I make the API call, the values are being passed however "$push" isn't adding value to completed array!! What am I missing here? When I try to push to value to a string, I get mongoose error as expected. But when I try to push value to an undefined key ('abc'), a new array doesn't get created like the mongodb documentation suggest! Not sure what is

问题 I am extremely new to javascript and found Brad Traversy's video Node.js with Passport Authentication and followed his video to a t. It worked for me, but then I wanted to add more. I created a custom dashboard and navigation. One page I added was a user profile page. I added this because I want to be able to update the user's information if possible. Now I'm stuck. I think I'm having an issue with my .findOneAndUpdate function that I placed in my route index.js. I may not be using the

问题 I am new to nodeJS and mongoose. I am trying to make a user model that does not save a password as plain text. In other backend frameworks you can accomplish this with an ORM by utilizing a virtual field. I looked up the docs for Mongoose and found that this can be accomplished. Following the dics I created the following Mongoose model. Mind you this is not the final implementation and is for merely testing my understanding of how Mongoose handle virtual fields. const mongoose = require(

问题 Currently my User model looks like: { _id: 'SomeId' firstName: 'John', lastName: 'Cena', books: [ { _id: 'xyz', title: 'a', author:'b', ratings:[ {source:'source1', value:"8"}, {source:'source2', value:"9"}] }, { _id: 'abc', title: 'c', author:'d', ratings:[ {source:'source3', value:"7"}, {source:'source4', value:"5"}] } ] } After making an findOneAndUpdate query to update rating=>value of 1st book object(_id: "xyz") from 8 to 10 for a given source(say "source1") : let up={ 'books.$[book]