I've schema like this and i', trying to get the document from the array using _id. This is my first Mongo project that I'm working, please help me how can I achieve the. I basically want to retrieve the sub document corresponds to the id and update some data in that.
var PhoneSchema = new mongoose.Schema({
type: String,
number: String
});
var StudentSchema = new mongoose.Schema({
name: String,
dept: String,
phone: [PhoneSchema]
});
var Phone = mongoose.model('Phone',PhoneSchema);
var Student = mongoose.model('Student',StudentSchema);
I've tried the following ways, but none of them are working.
Method 1: When I tried the same in the console it is giving me the parent document along with the sub document that corresponds to the phoneId
Student.findOne({"phone._id":new mongoose.Schema.Types.ObjectId(phoneId) }, {'phone.$':1}, function(err, student) {
}
Method 2: As per the mongoose documentation to retrieve sub documents, in this case I'm getting exception saying phone is undefined
Student.phone.Id(phoneId);
I've fixed this by removing Schema from the below query
Student.findOne({"phone._id":new mongoose.Types.ObjectId(phoneId) }, {'phone.$':1}, function(err, student) {
}
i tried to solve your requirement. The following code did the job.
var PhoneSchema = new mongoose.Schema({
type: String,
number: String
});
var StudentSchema = new mongoose.Schema({
name: String,
dept: String,
phone: [PhoneSchema]
});
var Phone = mongoose.model('Phone',PhoneSchema);
var Student = mongoose.model('Student',StudentSchema);
var newPhone = new Phone({
type: 'ios', number: '9030204942'
});
var newStudent = new Student({
name:'Pankaj',
dept:'cse',
phone:newPhone
});
// newStudent.save(function(err, ph) {
// if (err) return console.error(err);
// });
Student.findOne({"phone._id":mongoose.Types.ObjectId('587e6409e06170ba1708dc21') },{_id:0,phone:1}, function(err, phone) {
if(err){
console.log(err)
}
console.log(phone);
});
Find the following screenshot with result
Related
I have searched everywhere, StackOverflow and else where but I can't seem to find a fix for my problem. I have a mongoose schema like this:
// user.model.js
const mongoose = require('mongoose');
const User = new Schema({
firstName: String,
lastName: String,
tz: String,
registrationDate: {
type: Date,
default: Date.now(),
}
})
And I have a controller which creates a User like this:
// user.controller.js (async)
let user = await User.create({
'firstName': 'John',
'lastName': 'Doe',
'tz': 'Africa/Kampala'
});
await reply.send(user); // I am using Fastify framework
No matter what I do, when the User is returned it always gives the UTC time and not the time that the User actually is in. have tried using Mongoose transform:
// Transform on the schema
const moment = require('moment-timezone');
const User = new Schema({
// Schema definitions
}, {
toJSON: {
transform: function (doc, ret) {
ret.registrationDate= moment.tz(doc.registrationDate, doc.tz).format();
return ret;
}
}
})
And have also tried using get like this:
const User = new Schema({
// Other definitions
registrationDate: {
type: Date,
default: Date.now(),
get: convertDate
}
})
function convertDate(registrationDate) {
return moment.tz(registrationDate, this.tz).format()
}
But no luck. I would appreciate any assistance or guidance in getting this to work on the model. Thanks!
How can I execute this populate so that I can get the username of the person that does the tweet? I've tried with the function getusername() but it is not working as it gives me a tweetsSchema.findOne is not a function error.
var mongoose = require('mongoose');
var Schema = mongoose.Schema;
var tweetsSchema = new Schema(
{
tweets: { type: String, required: true }, //reference to the associated book
replies: { type: String, required: false },
username: { type: Schema.Types.ObjectId, ref: 'users' }
}
);
// Virtual for bookinstance's URL
function getUsername(tweets){
return tweetsSchema.findOne({ tweets: tweets })
.populate('username').exec((err, posts) => {
console.log("Populated User " + username);
})
}
getUsername()
//Export model
module.exports = mongoose.model('tweets', tweetsSchema);
currently the function you have defined is just a function and haven't defined on the Schema of yours and not exported.
you might want to use static in mongoose
tweetsSchema.static('getUsername', async function(tweets){
return await tweetsSchema.findOne({ tweets: tweets })
.populate('username').exec((err, posts) => {
console.log("Populated User " + username);
})
})
I have the following schema and query. I'm trying to retrieve all tags in my document by using the .distinct() method but that's not working. Any suggestions would be great.
const postingSchema = new mongoose.Schema({
time: String,
date: String,
company: String,
position: String,
description: String,
tags: Array,
});
router.get('/tags', async function(req, res){
const tags = await Postings.find({}).distinct("tags").exec();
if(!tags){
return res.status(404).json({message: "No Tags!"});
}
return res.status(200).json(tags);
}
I am trying to fetch all users from a MongoDB database. However for some reason recently the request did not fetch anything.
Here is the code in which I try to fetch the data:
app.get('/api/allusers', (req, res) => {
Employee.find()
.then(rettrievedData => {
res.json(rettrievedData)
});
});
Here is the mongoose model:
const mongoose = require('mongoose');
const employeeSchema = mongoose.Schema({
name: { type: String },
surName: { type: String },
mail: { type: String },
phone: { type: String },
});
module.exports = mongoose.model('Employee', employeeSchema, 'employee.employees');
Here is the code for connecting to Mongo
mongoose.connect("mongodb+srv://Kiril:xxxxxxxxxxxxx#cluster0-owdfy.mongodb.net/employee?retryWrites=true&w=majority")
.then(() => {
console.log("Connected")
})
Also I have checked that there is data in the database, but for some reason the Employee.find() does not retrieve anything. What can be reason?
Thanks in advance.
why you are adding 'employee.employyes' when you creating your model
try to export the model without it
module.exports = mongoose.model('Employee', employeeSchema)
or better
exports.Employee = mongoose.model('Employee', employeeSchema)
and require it where you want to use it
const Employee = require('path to the schema file')
I would like to add a category and then if successed, push it's ref to user' collection. That's how I'm doing this:
That's mine "dashboard.js" file which contains categories schema.
var users = require('./users');
var category = mongoose.model('categories', new mongoose.Schema({
_id: String,
name: String,
ownerId: { type: String, ref: 'users' }
}));
router.post('/settings/addCategory', function(req, res, next) {
console.log(req.body);
var category_toAdd = new category();
category_toAdd._id = mongoose.Types.ObjectId();
category_toAdd.name = req.body.categoryName;
category_toAdd.ownerId = req.body.ownerId;
category.findOne({
name: req.body.categoryName,
ownerId: req.body.ownerId
}, function(error, result) {
if(error) console.log(error);
else {
if(result === null) {
category_toAdd.save(function(error) {
if(error) console.log(error);
else {
console.log("Added category: " + category_toAdd);
<<<<<<<<<<<<<<<<<<<THE CONSOLE LOG WORKS GOOD
users.categories.push(category_toAdd);
}
});
}
}
});
Here is my "users.js" file which contains "users" schema.
var categories = require('./dashboard');
var user = mongoose.model('users', new mongoose.Schema({
_id: String,
login: String,
password: String,
email: String,
categories: [{ type: String, ref: 'categories' }]
}));
So, the category add proccess works well and I can find the category in database. The problem is when I'm trying to push the category to user.
This line:
users.categories.push(category_toAdd);
I get this error:
Cannot read property "push" of undefined.
I need to admit once more that before that pushing there is console.log where the category is printed properly.
Thanks for your time.
The users object is a Mongoose model and not an instance of it. You need the correct instance of the users model to add the category to.
dashboard.js
...
category_toAdd = {
_id: mongoose.Types.ObjectId(),
name: req.body.categoryName,
ownerId: req.body.ownerId
};
// Create the category here. `category` is the saved category.
category.create(category_toAdd, function (err, category) {
if (err) console.log(err);
// Find the `user` that owns the category.
users.findOne(category.ownerId, function (err, user) {
if (err) console.log(err);
// Add the category to the user's `categories` array.
user.categories.push(category);
});
});