I am trying to update deeply nested documents and confusing myself with all of the nesting. Below is my model and code so far. I want to update 'purchased' value of inventory based on the size variable that is passed in. I was reading about arrayFilters but I still cannot figure it out.
model:
const mongoose = require('mongoose');
const inventorySchema = new mongoose.Schema({
size: {
type: String,
},
purchased: {
type: Number,
},
used: {
type: Number,
},
});
const kidsSchema = new mongoose.Schema({
firstName: {
type: String,
trim: true,
minlength: 1,
maxlength: 99,
},
currentChild: {
type: Boolean,
},
brandPreference: {
type: String,
trim: true,
minlength: 1,
maxlength: 99,
},
currentSize: {
type: String,
},
currentSizeLabel: {
type: String,
},
lowAlert: {
type: String,
},
diaperHistory: [diaperHistorySchema],
totalPurchased: {
type: Number,
},
totalUsed: {
type: Number,
},
inventory: [inventorySchema],
});
const KidsRecordSchema = new mongoose.Schema({
kids: [kidsSchema],
});
const KidsRecord = mongoose.model('KidsRecord', KidsRecordSchema);
exports.KidsRecord = KidsRecord;
code:
/**
* #description PUT add diapers to kids inventory
*/
router.put('/update/:size', auth, async (req, res) => {
let id = req.body.user_id;
let kidID = req.body.kids_id;
let size = req.params.size;
let purchased = req.body.purchased;
try {
let record = await KidsRecord.findOne({ user_id: id });
let subRecord = record.kids.id(kidID);
let inventory = subRecord.inventory.filter((x) => x.size == size);
console.log('inventory', inventory);
// inventory give me:
// [{ "size": "0", "purchased": 0, "used": 0, "_id": "625e91571be23abeadbfbee6"}]
// which is what I want to target but then how do I apply $set to it?
// $set... ??
if (!subRecord) {
res.send({ message: 'No kids for this user.' });
return;
}
res.send(inventory);
} catch (error) {
res.send({ message: error.message });
}
});
I can drill down and find the correct inventory object I want to update, but not sure how to actually change in and save.
Related
I was trying to create HRM project using Node and Mongodb (Mongoose) with leave management so for the leave I have created two documents 1. for leavetypes i.e anualLeave, maternityLeave and so on and the other one of taking care of the leave requests taken by the employees.
So here is my schemas and api requests.
// leave schema embedded in leaveTypeSchema
const mongoose = require("mongoose");
const Joi = require("joi-browser");
Joi.objectId = require("joi-objectid")(Joi);
const { branchSchema } = require("./branch");
const { employeeSchema } = require("./employee");
const { leaveTypesSchema } = require("./leaveType");
const leaveSchema = mongoose.Schema({
branch: {
type: branchSchema,
required: true,
},
employee: {
type: employeeSchema,
required: true,
},
leaveType: {
type: [leaveTypesSchema],
required: true,
},
daysRequested: {
type: Number,
required: true,
},
fromDate: {
type: Date,
required: true,
},
endDate: {
type: Date,
required: true,
},
availableDays: {
type: Number,
},
});
const Leave = mongoose.model("leave", leaveSchema);
//validation
function validateLeave(leave) {
const schema = {
branchId: Joi.objectId().required(),
employeeId: Joi.objectId().required(),
leaveType: Joi.object()
.keys({
anualLeave: Joi.object()
.keys({
id: Joi.objectId().required(),
})
.required(),
})
.required(),
daysRequested: Joi.number().required(),
fromDate: Joi.date().required(),
endDate: Joi.date().required(),
};
return Joi.validate(leave, schema);
}
module.exports.Leave = Leave;
module.exports.Validate = validateLeave;
//route to post leave requests from employees
router.post("/", async (req, res) => {
// validate
const { error } = Validate(req.body);
if (error) return res.status(400).send(error.details[0].message);
// check if branch is valid
let branch = await Branch.findById(req.body.branchId);
if (!branch) return res.status(400).send("Invalid Branch");
// check if employee is valid
let employee = await Employee.findById(req.body.employeeId);
if (!employee) return res.status(400).send("Invalid employee");
// check if leaveType is valid
let leaveType = await LeaveType.findById({
id: ObjectID(req.body.leaveType.anualLeave.id),
});
if (!leaveType) return res.status(400).send("invalid leave Type");
// post the leave request
const leave = new Leave({
branch: {
_id: branch._id,
name: branch.name,
},
employee: {
_id: employee._id,
fullName: employee.fullName,
phoneNumber: employee.phoneNumber,
branch: {
_id: branch._id,
name: branch.name,
},
jobTitle: employee.jobTitle,
salary: employee.salary,
},
leaveType: [
{
anualLeave: {
id: leaveType.anualLeave.id,
},
},
],
daysRequested: req.body.daysRequested,
fromDate: req.body.fromDate,
endDate: req.body.endDate,
});
await leave.save();
res.send(leave);
Your document doesn't abide by the way you have created your schema.
When you are passing data to model, you have made leavetype nested inside employee
const leave = new Leave({
/**/
employee: {
_id: employee._id,
fullName: employee.fullName,
phoneNumber: employee.phoneNumber,
branch: {
_id: branch._id,
name: branch.name,
}, <- here
leaveType: [
{
anualLeave: {
id: leaveType.anualLeave.id,
},
},
],
});
whereas in the schema your leaveType is a diff. object property.
employee: {
type: employeeSchema,
required: true,
},
leaveType: {
type: [leaveTypesSchema],
required: true,
},
I am trying to calculate the average value of the ratings for a Product per Document that is being rated. Instead of calculating the average rating of the Product every time when we need the value. I calculate it every time someone rates it. To accomplish this task I am implementing a post(‘updateOne’) hook middleware. Though not sure I can accomplish this by implementing this hook. Let me know if I am going into the wrong direction. Here is the error I am getting avgRating error from post updateOne hookTypeError: Cannot read property 'aggregate' of undefined.
file - Product.js
import mongoose from 'mongoose';
const { ObjectId } = mongoose.Schema;
const ParentSchema = new mongoose.Schema(
{
title: {
type: String,
trim: true,
required: true,
maxlength: 32,
text: true,
},
slug: {
type: String,
unique: true,
lowercase: true,
index: true,
},
price: {
type: Number,
required: true,
trim: true,
maxlength: 32,
},
quantity: Number,
ratings: [
{
star: Number,
postedBy: { type: ObjectId, ref: 'User' },
},
],
},
{
timestamps: true,
}
);
const avgRating = async function () {
try {
const stats = await this.aggregate([
{
$addFields: {
avgRating: { $avg: '$ratings.star' },
nRatings: { $size: '$ratings' },
},
},
]);
console.log('stats: ', stats);
} catch (err) {
console.log(`avgRating error from post updateOne hook${err}`);
}
};
// Call avgRating after updateOne
ParentSchema.post(
'updateOne',
{ document: true, query: false },
async function () {
await avgRating();
}
);
export default mongoose.models.Product ||
mongoose.model('Product', ParentSchema);
file - productServices.js
import Product from './Product.js';
const updateRating = async (existingRatingObject, star) => {
const query = {
ratings: { $elemMatch: existingRatingObject },
};
const update = { $set: { 'ratings.$.star': star } };
const option = { new: true };
try {
const doc = new Product();
const ratingUpdated = await doc.updateOne(query, update, option);
return ratingUpdated;
} catch (error) {
console.log('product model updateRating error: ', error);
}
};
Your avgRating function does not have access to the mongoose document under this. That is why you are getting the error, Cannot read property 'aggregate' of undefined, because this (the document) which you want to modify does not exists in the function.
You need to use an instance method available under mongoose. With instance method, you can call this to reference the document.
Check out:
https://www.freecodecamp.org/news/introduction-to-mongoose-for-mongodb-d2a7aa593c57/#instace-methods
https://mongoosejs.com/docs/guide.html#methods
Hi all so I am trying to make a post request that increments a value if it already exists and if not it should create a new item.
router.post('/', auth, async (req, res) => {
try {
const { name, price, image } = req.body;
var query = { name },
update = { $inc: { count: 1 } },
options = { upsert: true, new: true,};
await CartItem.findOneAndUpdate(query, update, options, function (
err,
data
) {
if (err) {
const newItem = new CartItem({
user: req.user.id,
name: name,
price: price,
image: image,
});
const item = newItem.save();
res.json(item);
} else {
res.json(data);
}
});
} catch (err) {
console.error(err.message);
res.status(500).send('Server Error');
}
});
const mongoose = require('mongoose');
const Schema = mongoose.Schema;
const CartItemSchema = new Schema({
user: {
type: Schema.Types.ObjectId,
ref: 'user',
},
name: {
type: String,
required: true,
},
price: {
type: Number,
required: true,
},
count: {
type: Number,
},
image: {
type: String,
required: true,
},
});
module.exports = CartItem = mongoose.model('cartItem', CartItemSchema);
So there are two problems here that I cannot wrap my head around(Pretty new with MongoDb, did do my research).
I can get the count to increment, but it increments with 2 or even more instead of 1. (I know other users also experienced this)
If the item is already in the cart(name matches) I want a new item to be added which does happen, but it only adds the name, count and Id. I want it to add the user, name, price and image.
Would appreciate some assistance.
you should create your document with a default value equals to 0.
define count at your schema like the following:
count: {
type: Number,
default: 0
}
then use { $inc: { <field1>: <amount1>, <field2>: <amount2>, ... } }.
link to docs: https://docs.mongodb.com/manual/reference/operator/update/inc/
Basically I'm trying to get the time and the entity changed in a particular model when ever the update method is called.
This is my model I want to keep track of:
const mongoose = require("mongoose");
const modelSchema = mongoose.Schema({
user: {
type: mongoose.Schema.Types.ObjectId,
ref: "User",
},
name: {
type: String,
required: true,
},
note1: String,
note2: String,
note3: String,
images: {
type: Array,
required: true
},
status: {
enum: ['draft', 'pending_quote', 'pendong_payment', 'in_production', 'in_repair', 'pemding_my_review', 'fulfilled'],
type: String,
default: "draft"
},
price: {
type: mongoose.Schema.Types.ObjectId,
ref: "Price",
}
}, {
timestamps: true,
})
module.exports = mongoose.model("Model", modelSchema)
And this is the method I call to update the status:
exports.updateModel = async (req, res) => {
try {
let id = req.params.id;
let response = await Model.findByIdAndUpdate(id, req.body, {
new: true
})
res.status(200).json({
status: "Success",
data: response
})
} catch (err) {
res.status(500).json({
error: err,
msg: "Something Went Wrong"
})
}
}
you can add a new field in your schema like:
logs:[{
entity: String,
timeStamp: Date
}]
Then updating it basing on your current code:
let id = req.params.id;
// I don't know whats in the req.body but assuming that it
// has the correct structure when passed from the front end
let response = await Model.findByIdAndUpdate(id,
{
$set:req.body,
$push:{logs:{entity:'your entity name here',timeStamp:new Date()}}
}, {
new: true
})
I have the following model:
var requestSchema = new Schema({
description: { type: String, required: true },
country: { type: String, index: true },
shipping: [shipping],
deliveryLoc: { type: String, index: true },
price: { type: Number, default: 0 },
})
I now want to get the price using mongoose and I am not sure which command I have to use.
I tried:
var pricy = _.first(_.where(request.price));
and it does not work, I get undefined even through through other queries in the same file I can get "shipping".
Getting the shipping type works with the following command:
var shipping = _.first(_.where(request.shipping, { type: shippingType }));
Am I using the wrong command?
You should be able to use the select method as follows:
// find a request
var query = Request.findOne();
// selecting the `price` field
query.select('price');
// execute the query at a later time
query.exec(function (err, request) {
if (err) return handleError(err);
console.log('The price is $%s.', person.price) // The price is $6.92
});
or if passing a callback:
var Request = mongoose.model('Request', requestSchema);
// find each request with a country matching 'Zimbabwe', selecting the `price` field
Request.findOne({ 'country': 'Zimbabwe' }, 'price', function (err, request) {
if (err) return handleError(err);
console.log('The price is $%s.', request.price) // The price is $6.92.
});
First, you need to create your schema like that:
var items = new Schema({
description: { type: String, required: true },
country: { type: String, index: true },
shipping: [shipping],
deliveryLoc: { type: String, index: true },
price: { type: Number, default: 0 },
});
After that you need to compile the new schema and add it to the database:
items = mongoose.model("Items", items); // The table name will be "Items"
When the model is created, you can execute your query (find or findOne):
items.findOne({price: request.price}, function (error, item) {
if (error) {
console.log(error);
} else {
console.log(item);
}
});
The full code:
var mongoose, Schema;
mongoose = require("mongoose");
Schema = mongoose.Schema;
var items = new Schema({
description: { type: String, required: true },
country: { type: String, index: true },
shipping: [shipping],
deliveryLoc: { type: String, index: true },
price: { type: Number, default: 0 },
});
items = mongoose.model("Items", items);
items.findOne({price: request.price}, function (error, item) {
if (error) {
console.log(error);
} else {
console.log(item);
}
});