Related
This is what my original array looks like
[
{
_id: new ObjectId("12934193c51a231b0165425a"),
userid: '62921df1c14a2eea0efa9399',
timestamp: 1653817696599,
},
{
_id: new ObjectId("11934193c51a231b0165425a"),
userid: '62921df1c14a2eea0efa9399',
timestamp: 1653817696600,
}
]
I use this code to convert the timestamp
const newNotifications = notifications.map((element, index) => {
return {
element: element,
new_timestamp: new Date(element.timestamp),
};
});
And this is the result I have
[
{
"element": {
"_id": "12934193c51a231b0165425a",
"userid": "62921df1c14a2eea0efa9399",
"timestamp": 1653817696599,
},
"timestamp": "2022-05-29T09:48:16.599Z",
},
]
I try to make it look like this
[
{
_id: new ObjectId("12934193c51a231b0165425a"),
userid: '62921df1c14a2eea0efa9399',
timestamp: 1653817696599,
new_timestamp: '2022-05-29T09:48:16.599Z',
},
{
_id: new ObjectId("11934193c51a231b0165425a"),
userid: '62921df1c14a2eea0efa9399',
timestamp: 1653817696600,
new_timestamp: '2022-05-29T09:48:16.599Z',
},
]
I would like the timestamp to be part of each newly created object and remove the element property generated by the current mapping.
You can bind the new_timestamp into the existing object nd then return the whole object :
const notifications = [
{
_id: "12934193c51a231b0165425a",
userid: '62921df1c14a2eea0efa9399',
timestamp: 1653817696599,
},
{
_id: "11934193c51a231b0165425a",
userid: '62921df1c14a2eea0efa9399',
timestamp: 1653817696600,
}
];
const newNotifications = notifications.map((element) => {
element['new_timestamp'] = new Date(element.timestamp).toString()
return element;
});
console.log(newNotifications);
Basically I have a mongodb collection called 'people'
whose schema is as follows:
people: {
name: String,
friends: [{firstName: String, lastName: String}]
}
Now, I have a very basic express application that connects to the database and successfully creates 'people' with an empty friends array.
In a secondary place in the application, a form is in place to add friends. The form takes in firstName and lastName and then POSTs with the name field also for reference to the proper people object.
What I'm having a hard time doing is creating a new friend object and then "pushing" it into the friends array.
I know that when I do this via the mongo console I use the update function with $push as my second argument after the lookup criteria, but I can't seem to find the appropriate way to get mongoose to do this.
db.people.update({name: "John"}, {$push: {friends: {firstName: "Harry", lastName: "Potter"}}});
Assuming, var friend = { firstName: 'Harry', lastName: 'Potter' };
There are two options you have:
Update the model in-memory, and save (plain javascript array.push):
person.friends.push(friend);
person.save(done);
or
PersonModel.update(
{ _id: person._id },
{ $push: { friends: friend } },
done
);
I always try and go for the first option when possible, because it'll respect more of the benefits that mongoose gives you (hooks, validation, etc.).
However, if you are doing lots of concurrent writes, you will hit race conditions where you'll end up with nasty version errors to stop you from replacing the entire model each time and losing the previous friend you added. So only go to the latter when it's absolutely necessary.
The $push operator appends a specified value to an array.
{ $push: { <field1>: <value1>, ... } }
$push adds the array field with the value as its element.
Above answer fulfils all the requirements, but I got it working by doing the following
var objFriends = { fname:"fname",lname:"lname",surname:"surname" };
People.findOneAndUpdate(
{ _id: req.body.id },
{ $push: { friends: objFriends } },
function (error, success) {
if (error) {
console.log(error);
} else {
console.log(success);
}
});
)
Another way to push items into array using Mongoose is- $addToSet, if you want only unique items to be pushed into array. $push operator simply adds the object to array whether or not the object is already present, while $addToSet does that only if the object is not present in the array so as not to incorporate duplicacy.
PersonModel.update(
{ _id: person._id },
{ $addToSet: { friends: friend } }
);
This will look for the object you are adding to array. If found, does nothing. If not, adds it to the array.
References:
$addToSet
MongooseArray.prototype.addToSet()
Use $push to update document and insert new value inside an array.
find:
db.getCollection('noti').find({})
result for find:
{
"_id" : ObjectId("5bc061f05a4c0511a9252e88"),
"count" : 1.0,
"color" : "green",
"icon" : "circle",
"graph" : [
{
"date" : ISODate("2018-10-24T08:55:13.331Z"),
"count" : 2.0
}
],
"name" : "online visitor",
"read" : false,
"date" : ISODate("2018-10-12T08:57:20.853Z"),
"__v" : 0.0
}
update:
db.getCollection('noti').findOneAndUpdate(
{ _id: ObjectId("5bc061f05a4c0511a9252e88") },
{ $push: {
graph: {
"date" : ISODate("2018-10-24T08:55:13.331Z"),
"count" : 3.0
}
}
})
result for update:
{
"_id" : ObjectId("5bc061f05a4c0511a9252e88"),
"count" : 1.0,
"color" : "green",
"icon" : "circle",
"graph" : [
{
"date" : ISODate("2018-10-24T08:55:13.331Z"),
"count" : 2.0
},
{
"date" : ISODate("2018-10-24T08:55:13.331Z"),
"count" : 3.0
}
],
"name" : "online visitor",
"read" : false,
"date" : ISODate("2018-10-12T08:57:20.853Z"),
"__v" : 0.0
}
First I tried this code
const peopleSchema = new mongoose.Schema({
name: String,
friends: [
{
firstName: String,
lastName: String,
},
],
});
const People = mongoose.model("person", peopleSchema);
const first = new Note({
name: "Yash Salvi",
notes: [
{
firstName: "Johnny",
lastName: "Johnson",
},
],
});
first.save();
const friendNew = {
firstName: "Alice",
lastName: "Parker",
};
People.findOneAndUpdate(
{ name: "Yash Salvi" },
{ $push: { friends: friendNew } },
function (error, success) {
if (error) {
console.log(error);
} else {
console.log(success);
}
}
);
But I noticed that only first friend (i.e. Johhny Johnson) gets saved and the objective to push array element in existing array of "friends" doesn't seem to work as when I run the code , in database in only shows "First friend" and "friends" array has only one element !
So the simple solution is written below
const peopleSchema = new mongoose.Schema({
name: String,
friends: [
{
firstName: String,
lastName: String,
},
],
});
const People = mongoose.model("person", peopleSchema);
const first = new Note({
name: "Yash Salvi",
notes: [
{
firstName: "Johnny",
lastName: "Johnson",
},
],
});
first.save();
const friendNew = {
firstName: "Alice",
lastName: "Parker",
};
People.findOneAndUpdate(
{ name: "Yash Salvi" },
{ $push: { friends: friendNew } },
{ upsert: true }
);
Adding "{ upsert: true }" solved problem in my case and once code is saved and I run it , I see that "friends" array now has 2 elements !
The upsert = true option creates the object if it doesn't exist. default is set to false.
if it doesn't work use below snippet
People.findOneAndUpdate(
{ name: "Yash Salvi" },
{ $push: { friends: friendNew } },
).exec();
An easy way to do that is to use the following:
var John = people.findOne({name: "John"});
John.friends.push({firstName: "Harry", lastName: "Potter"});
John.save();
In my case, I did this
const eventId = event.id;
User.findByIdAndUpdate(id, { $push: { createdEvents: eventId } }).exec();
Push to nested field - use a dot notation
For anyone wondering how to push to a nested field when you have for example this Schema.
const UserModel = new mongoose.schema({
friends: {
bestFriends: [{ firstName: String, lastName: String }],
otherFriends: [{ firstName: String, lastName: String }]
}
});
You just use a dot notation, like this:
const updatedUser = await UserModel.update({_id: args._id}, {
$push: {
"friends.bestFriends": {firstName: "Ima", lastName: "Weiner"}
}
});
This is how you could push an item - official docs
const schema = Schema({ nums: [Number] });
const Model = mongoose.model('Test', schema);
const doc = await Model.create({ nums: [3, 4] });
doc.nums.push(5); // Add 5 to the end of the array
await doc.save();
// You can also pass an object with `$each` as the
// first parameter to use MongoDB's `$position`
doc.nums.push({
$each: [1, 2],
$position: 0
});
doc.nums;
// This is the my solution for this question.
// I want to add new object in worKingHours(array of objects) -->
workingHours: [
{
workingDate: Date,
entryTime: Date,
exitTime: Date,
},
],
// employeeRoutes.js
const express = require("express");
const router = express.Router();
const EmployeeController = require("../controllers/employeeController");
router
.route("/:id")
.put(EmployeeController.updateWorkingDay)
// employeeModel.js
const mongoose = require("mongoose");
const validator = require("validator");
const employeeSchema = new mongoose.Schema(
{
name: {
type: String,
required: [true, "Please enter your name"],
},
address: {
type: String,
required: [true, "Please enter your name"],
},
email: {
type: String,
unique: true,
lowercase: true,
required: [true, "Please enter your name"],
validate: [validator.isEmail, "Please provide a valid email"],
},
phone: {
type: String,
required: [true, "Please enter your name"],
},
joiningDate: {
type: Date,
required: [true, "Please Enter your joining date"],
},
workingHours: [
{
workingDate: Date,
entryTime: Date,
exitTime: Date,
},
],
},
{
toJSON: { virtuals: true },
toObject: { virtuals: true },
}
);
const Employee = mongoose.model("Employee", employeeSchema);
module.exports = Employee;
// employeeContoller.js
/////////////////////////// SOLUTION IS BELOW ///////////////////////////////
// This is for adding another day, entry and exit time
exports.updateWorkingDay = async (req, res) => {
const doc = await Employee.findByIdAndUpdate(req.params.id, {
$push: {
workingHours: req.body,
},
});
res.status(200).json({
status: "true",
data: { doc },
});
};
https://www.youtube.com/watch?v=gtUPPO8Re98
I ran into this issue as well. My fix was to create a child schema. See below for an example for your models.
---- Person model
const mongoose = require('mongoose');
const SingleFriend = require('./SingleFriend');
const Schema = mongoose.Schema;
const productSchema = new Schema({
friends : [SingleFriend.schema]
});
module.exports = mongoose.model('Person', personSchema);
***Important: SingleFriend.schema -> make sure to use lowercase for schema
--- Child schema
const mongoose = require('mongoose');
const Schema = mongoose.Schema;
const SingleFriendSchema = new Schema({
Name: String
});
module.exports = mongoose.model('SingleFriend', SingleFriendSchema);
Basically I have a mongodb collection called 'people'
whose schema is as follows:
people: {
name: String,
friends: [{firstName: String, lastName: String}]
}
Now, I have a very basic express application that connects to the database and successfully creates 'people' with an empty friends array.
In a secondary place in the application, a form is in place to add friends. The form takes in firstName and lastName and then POSTs with the name field also for reference to the proper people object.
What I'm having a hard time doing is creating a new friend object and then "pushing" it into the friends array.
I know that when I do this via the mongo console I use the update function with $push as my second argument after the lookup criteria, but I can't seem to find the appropriate way to get mongoose to do this.
db.people.update({name: "John"}, {$push: {friends: {firstName: "Harry", lastName: "Potter"}}});
Assuming, var friend = { firstName: 'Harry', lastName: 'Potter' };
There are two options you have:
Update the model in-memory, and save (plain javascript array.push):
person.friends.push(friend);
person.save(done);
or
PersonModel.update(
{ _id: person._id },
{ $push: { friends: friend } },
done
);
I always try and go for the first option when possible, because it'll respect more of the benefits that mongoose gives you (hooks, validation, etc.).
However, if you are doing lots of concurrent writes, you will hit race conditions where you'll end up with nasty version errors to stop you from replacing the entire model each time and losing the previous friend you added. So only go to the latter when it's absolutely necessary.
The $push operator appends a specified value to an array.
{ $push: { <field1>: <value1>, ... } }
$push adds the array field with the value as its element.
Above answer fulfils all the requirements, but I got it working by doing the following
var objFriends = { fname:"fname",lname:"lname",surname:"surname" };
People.findOneAndUpdate(
{ _id: req.body.id },
{ $push: { friends: objFriends } },
function (error, success) {
if (error) {
console.log(error);
} else {
console.log(success);
}
});
)
Another way to push items into array using Mongoose is- $addToSet, if you want only unique items to be pushed into array. $push operator simply adds the object to array whether or not the object is already present, while $addToSet does that only if the object is not present in the array so as not to incorporate duplicacy.
PersonModel.update(
{ _id: person._id },
{ $addToSet: { friends: friend } }
);
This will look for the object you are adding to array. If found, does nothing. If not, adds it to the array.
References:
$addToSet
MongooseArray.prototype.addToSet()
Use $push to update document and insert new value inside an array.
find:
db.getCollection('noti').find({})
result for find:
{
"_id" : ObjectId("5bc061f05a4c0511a9252e88"),
"count" : 1.0,
"color" : "green",
"icon" : "circle",
"graph" : [
{
"date" : ISODate("2018-10-24T08:55:13.331Z"),
"count" : 2.0
}
],
"name" : "online visitor",
"read" : false,
"date" : ISODate("2018-10-12T08:57:20.853Z"),
"__v" : 0.0
}
update:
db.getCollection('noti').findOneAndUpdate(
{ _id: ObjectId("5bc061f05a4c0511a9252e88") },
{ $push: {
graph: {
"date" : ISODate("2018-10-24T08:55:13.331Z"),
"count" : 3.0
}
}
})
result for update:
{
"_id" : ObjectId("5bc061f05a4c0511a9252e88"),
"count" : 1.0,
"color" : "green",
"icon" : "circle",
"graph" : [
{
"date" : ISODate("2018-10-24T08:55:13.331Z"),
"count" : 2.0
},
{
"date" : ISODate("2018-10-24T08:55:13.331Z"),
"count" : 3.0
}
],
"name" : "online visitor",
"read" : false,
"date" : ISODate("2018-10-12T08:57:20.853Z"),
"__v" : 0.0
}
First I tried this code
const peopleSchema = new mongoose.Schema({
name: String,
friends: [
{
firstName: String,
lastName: String,
},
],
});
const People = mongoose.model("person", peopleSchema);
const first = new Note({
name: "Yash Salvi",
notes: [
{
firstName: "Johnny",
lastName: "Johnson",
},
],
});
first.save();
const friendNew = {
firstName: "Alice",
lastName: "Parker",
};
People.findOneAndUpdate(
{ name: "Yash Salvi" },
{ $push: { friends: friendNew } },
function (error, success) {
if (error) {
console.log(error);
} else {
console.log(success);
}
}
);
But I noticed that only first friend (i.e. Johhny Johnson) gets saved and the objective to push array element in existing array of "friends" doesn't seem to work as when I run the code , in database in only shows "First friend" and "friends" array has only one element !
So the simple solution is written below
const peopleSchema = new mongoose.Schema({
name: String,
friends: [
{
firstName: String,
lastName: String,
},
],
});
const People = mongoose.model("person", peopleSchema);
const first = new Note({
name: "Yash Salvi",
notes: [
{
firstName: "Johnny",
lastName: "Johnson",
},
],
});
first.save();
const friendNew = {
firstName: "Alice",
lastName: "Parker",
};
People.findOneAndUpdate(
{ name: "Yash Salvi" },
{ $push: { friends: friendNew } },
{ upsert: true }
);
Adding "{ upsert: true }" solved problem in my case and once code is saved and I run it , I see that "friends" array now has 2 elements !
The upsert = true option creates the object if it doesn't exist. default is set to false.
if it doesn't work use below snippet
People.findOneAndUpdate(
{ name: "Yash Salvi" },
{ $push: { friends: friendNew } },
).exec();
An easy way to do that is to use the following:
var John = people.findOne({name: "John"});
John.friends.push({firstName: "Harry", lastName: "Potter"});
John.save();
In my case, I did this
const eventId = event.id;
User.findByIdAndUpdate(id, { $push: { createdEvents: eventId } }).exec();
Push to nested field - use a dot notation
For anyone wondering how to push to a nested field when you have for example this Schema.
const UserModel = new mongoose.schema({
friends: {
bestFriends: [{ firstName: String, lastName: String }],
otherFriends: [{ firstName: String, lastName: String }]
}
});
You just use a dot notation, like this:
const updatedUser = await UserModel.update({_id: args._id}, {
$push: {
"friends.bestFriends": {firstName: "Ima", lastName: "Weiner"}
}
});
This is how you could push an item - official docs
const schema = Schema({ nums: [Number] });
const Model = mongoose.model('Test', schema);
const doc = await Model.create({ nums: [3, 4] });
doc.nums.push(5); // Add 5 to the end of the array
await doc.save();
// You can also pass an object with `$each` as the
// first parameter to use MongoDB's `$position`
doc.nums.push({
$each: [1, 2],
$position: 0
});
doc.nums;
// This is the my solution for this question.
// I want to add new object in worKingHours(array of objects) -->
workingHours: [
{
workingDate: Date,
entryTime: Date,
exitTime: Date,
},
],
// employeeRoutes.js
const express = require("express");
const router = express.Router();
const EmployeeController = require("../controllers/employeeController");
router
.route("/:id")
.put(EmployeeController.updateWorkingDay)
// employeeModel.js
const mongoose = require("mongoose");
const validator = require("validator");
const employeeSchema = new mongoose.Schema(
{
name: {
type: String,
required: [true, "Please enter your name"],
},
address: {
type: String,
required: [true, "Please enter your name"],
},
email: {
type: String,
unique: true,
lowercase: true,
required: [true, "Please enter your name"],
validate: [validator.isEmail, "Please provide a valid email"],
},
phone: {
type: String,
required: [true, "Please enter your name"],
},
joiningDate: {
type: Date,
required: [true, "Please Enter your joining date"],
},
workingHours: [
{
workingDate: Date,
entryTime: Date,
exitTime: Date,
},
],
},
{
toJSON: { virtuals: true },
toObject: { virtuals: true },
}
);
const Employee = mongoose.model("Employee", employeeSchema);
module.exports = Employee;
// employeeContoller.js
/////////////////////////// SOLUTION IS BELOW ///////////////////////////////
// This is for adding another day, entry and exit time
exports.updateWorkingDay = async (req, res) => {
const doc = await Employee.findByIdAndUpdate(req.params.id, {
$push: {
workingHours: req.body,
},
});
res.status(200).json({
status: "true",
data: { doc },
});
};
https://www.youtube.com/watch?v=gtUPPO8Re98
I ran into this issue as well. My fix was to create a child schema. See below for an example for your models.
---- Person model
const mongoose = require('mongoose');
const SingleFriend = require('./SingleFriend');
const Schema = mongoose.Schema;
const productSchema = new Schema({
friends : [SingleFriend.schema]
});
module.exports = mongoose.model('Person', personSchema);
***Important: SingleFriend.schema -> make sure to use lowercase for schema
--- Child schema
const mongoose = require('mongoose');
const Schema = mongoose.Schema;
const SingleFriendSchema = new Schema({
Name: String
});
module.exports = mongoose.model('SingleFriend', SingleFriendSchema);
Basically I have a mongodb collection called 'people'
whose schema is as follows:
people: {
name: String,
friends: [{firstName: String, lastName: String}]
}
Now, I have a very basic express application that connects to the database and successfully creates 'people' with an empty friends array.
In a secondary place in the application, a form is in place to add friends. The form takes in firstName and lastName and then POSTs with the name field also for reference to the proper people object.
What I'm having a hard time doing is creating a new friend object and then "pushing" it into the friends array.
I know that when I do this via the mongo console I use the update function with $push as my second argument after the lookup criteria, but I can't seem to find the appropriate way to get mongoose to do this.
db.people.update({name: "John"}, {$push: {friends: {firstName: "Harry", lastName: "Potter"}}});
Assuming, var friend = { firstName: 'Harry', lastName: 'Potter' };
There are two options you have:
Update the model in-memory, and save (plain javascript array.push):
person.friends.push(friend);
person.save(done);
or
PersonModel.update(
{ _id: person._id },
{ $push: { friends: friend } },
done
);
I always try and go for the first option when possible, because it'll respect more of the benefits that mongoose gives you (hooks, validation, etc.).
However, if you are doing lots of concurrent writes, you will hit race conditions where you'll end up with nasty version errors to stop you from replacing the entire model each time and losing the previous friend you added. So only go to the latter when it's absolutely necessary.
The $push operator appends a specified value to an array.
{ $push: { <field1>: <value1>, ... } }
$push adds the array field with the value as its element.
Above answer fulfils all the requirements, but I got it working by doing the following
var objFriends = { fname:"fname",lname:"lname",surname:"surname" };
People.findOneAndUpdate(
{ _id: req.body.id },
{ $push: { friends: objFriends } },
function (error, success) {
if (error) {
console.log(error);
} else {
console.log(success);
}
});
)
Another way to push items into array using Mongoose is- $addToSet, if you want only unique items to be pushed into array. $push operator simply adds the object to array whether or not the object is already present, while $addToSet does that only if the object is not present in the array so as not to incorporate duplicacy.
PersonModel.update(
{ _id: person._id },
{ $addToSet: { friends: friend } }
);
This will look for the object you are adding to array. If found, does nothing. If not, adds it to the array.
References:
$addToSet
MongooseArray.prototype.addToSet()
Use $push to update document and insert new value inside an array.
find:
db.getCollection('noti').find({})
result for find:
{
"_id" : ObjectId("5bc061f05a4c0511a9252e88"),
"count" : 1.0,
"color" : "green",
"icon" : "circle",
"graph" : [
{
"date" : ISODate("2018-10-24T08:55:13.331Z"),
"count" : 2.0
}
],
"name" : "online visitor",
"read" : false,
"date" : ISODate("2018-10-12T08:57:20.853Z"),
"__v" : 0.0
}
update:
db.getCollection('noti').findOneAndUpdate(
{ _id: ObjectId("5bc061f05a4c0511a9252e88") },
{ $push: {
graph: {
"date" : ISODate("2018-10-24T08:55:13.331Z"),
"count" : 3.0
}
}
})
result for update:
{
"_id" : ObjectId("5bc061f05a4c0511a9252e88"),
"count" : 1.0,
"color" : "green",
"icon" : "circle",
"graph" : [
{
"date" : ISODate("2018-10-24T08:55:13.331Z"),
"count" : 2.0
},
{
"date" : ISODate("2018-10-24T08:55:13.331Z"),
"count" : 3.0
}
],
"name" : "online visitor",
"read" : false,
"date" : ISODate("2018-10-12T08:57:20.853Z"),
"__v" : 0.0
}
First I tried this code
const peopleSchema = new mongoose.Schema({
name: String,
friends: [
{
firstName: String,
lastName: String,
},
],
});
const People = mongoose.model("person", peopleSchema);
const first = new Note({
name: "Yash Salvi",
notes: [
{
firstName: "Johnny",
lastName: "Johnson",
},
],
});
first.save();
const friendNew = {
firstName: "Alice",
lastName: "Parker",
};
People.findOneAndUpdate(
{ name: "Yash Salvi" },
{ $push: { friends: friendNew } },
function (error, success) {
if (error) {
console.log(error);
} else {
console.log(success);
}
}
);
But I noticed that only first friend (i.e. Johhny Johnson) gets saved and the objective to push array element in existing array of "friends" doesn't seem to work as when I run the code , in database in only shows "First friend" and "friends" array has only one element !
So the simple solution is written below
const peopleSchema = new mongoose.Schema({
name: String,
friends: [
{
firstName: String,
lastName: String,
},
],
});
const People = mongoose.model("person", peopleSchema);
const first = new Note({
name: "Yash Salvi",
notes: [
{
firstName: "Johnny",
lastName: "Johnson",
},
],
});
first.save();
const friendNew = {
firstName: "Alice",
lastName: "Parker",
};
People.findOneAndUpdate(
{ name: "Yash Salvi" },
{ $push: { friends: friendNew } },
{ upsert: true }
);
Adding "{ upsert: true }" solved problem in my case and once code is saved and I run it , I see that "friends" array now has 2 elements !
The upsert = true option creates the object if it doesn't exist. default is set to false.
if it doesn't work use below snippet
People.findOneAndUpdate(
{ name: "Yash Salvi" },
{ $push: { friends: friendNew } },
).exec();
An easy way to do that is to use the following:
var John = people.findOne({name: "John"});
John.friends.push({firstName: "Harry", lastName: "Potter"});
John.save();
In my case, I did this
const eventId = event.id;
User.findByIdAndUpdate(id, { $push: { createdEvents: eventId } }).exec();
Push to nested field - use a dot notation
For anyone wondering how to push to a nested field when you have for example this Schema.
const UserModel = new mongoose.schema({
friends: {
bestFriends: [{ firstName: String, lastName: String }],
otherFriends: [{ firstName: String, lastName: String }]
}
});
You just use a dot notation, like this:
const updatedUser = await UserModel.update({_id: args._id}, {
$push: {
"friends.bestFriends": {firstName: "Ima", lastName: "Weiner"}
}
});
This is how you could push an item - official docs
const schema = Schema({ nums: [Number] });
const Model = mongoose.model('Test', schema);
const doc = await Model.create({ nums: [3, 4] });
doc.nums.push(5); // Add 5 to the end of the array
await doc.save();
// You can also pass an object with `$each` as the
// first parameter to use MongoDB's `$position`
doc.nums.push({
$each: [1, 2],
$position: 0
});
doc.nums;
// This is the my solution for this question.
// I want to add new object in worKingHours(array of objects) -->
workingHours: [
{
workingDate: Date,
entryTime: Date,
exitTime: Date,
},
],
// employeeRoutes.js
const express = require("express");
const router = express.Router();
const EmployeeController = require("../controllers/employeeController");
router
.route("/:id")
.put(EmployeeController.updateWorkingDay)
// employeeModel.js
const mongoose = require("mongoose");
const validator = require("validator");
const employeeSchema = new mongoose.Schema(
{
name: {
type: String,
required: [true, "Please enter your name"],
},
address: {
type: String,
required: [true, "Please enter your name"],
},
email: {
type: String,
unique: true,
lowercase: true,
required: [true, "Please enter your name"],
validate: [validator.isEmail, "Please provide a valid email"],
},
phone: {
type: String,
required: [true, "Please enter your name"],
},
joiningDate: {
type: Date,
required: [true, "Please Enter your joining date"],
},
workingHours: [
{
workingDate: Date,
entryTime: Date,
exitTime: Date,
},
],
},
{
toJSON: { virtuals: true },
toObject: { virtuals: true },
}
);
const Employee = mongoose.model("Employee", employeeSchema);
module.exports = Employee;
// employeeContoller.js
/////////////////////////// SOLUTION IS BELOW ///////////////////////////////
// This is for adding another day, entry and exit time
exports.updateWorkingDay = async (req, res) => {
const doc = await Employee.findByIdAndUpdate(req.params.id, {
$push: {
workingHours: req.body,
},
});
res.status(200).json({
status: "true",
data: { doc },
});
};
https://www.youtube.com/watch?v=gtUPPO8Re98
I ran into this issue as well. My fix was to create a child schema. See below for an example for your models.
---- Person model
const mongoose = require('mongoose');
const SingleFriend = require('./SingleFriend');
const Schema = mongoose.Schema;
const productSchema = new Schema({
friends : [SingleFriend.schema]
});
module.exports = mongoose.model('Person', personSchema);
***Important: SingleFriend.schema -> make sure to use lowercase for schema
--- Child schema
const mongoose = require('mongoose');
const Schema = mongoose.Schema;
const SingleFriendSchema = new Schema({
Name: String
});
module.exports = mongoose.model('SingleFriend', SingleFriendSchema);
As far as I know, it's possible to sort populated docs with Mongoose (source).
I'm searching for a way to sort a query by one or more populated fields.
Consider this two Mongoose schemas :
var Wizard = new Schema({
name : { type: String }
, spells : { [{ type: Schema.ObjectId, ref: 'Spell' }] }
});
var Spell = new Schema({
name : { type: String }
, damages : { type: Number }
});
Sample JSON:
[{
name: 'Gandalf',
spells: [{
name: 'Fireball',
damages: 20
}]
}, {
name: 'Saruman',
spells: [{
name: 'Frozenball',
damages: 10
}]
}, {
name: 'Radagast',
spells: [{
name: 'Lightball',
damages: 15
}]
}]
I would like to sort those wizards by their spell damages, using something like :
WizardModel
.find({})
.populate('spells', myfields, myconditions, { sort: [['damages', 'asc']] })
// Should return in the right order: Saruman, Radagast, Gandalf
I'm actually doing those sorts by hands after querying and would like to optimize that.
You can explicitly specify only required parameters of populate method:
WizardModel
.find({})
.populate({path: 'spells', options: { sort: [['damages', 'asc']] }})
Have a look at http://mongoosejs.com/docs/api.html#document_Document-populate
Here is an example from a link above.
doc
.populate('company')
.populate({
path: 'notes',
match: /airline/,
select: 'text',
model: 'modelName'
options: opts
}, function (err, user) {
assert(doc._id == user._id) // the document itself is passed
})
Even though this is rather an old post, I'd like to share a solution through the MongoDB aggregation lookup pipeline
The important part is this:
{
$lookup: {
from: 'spells',
localField: 'spells',
foreignField:'_id',
as: 'spells'
}
},
{
$project: {
_id: 1,
name: 1,
// project the values from damages in the spells array in a new array called damages
damages: '$spells.damages',
spells: {
name: 1,
damages: 1
}
}
},
// take the maximum damage from the damages array
{
$project: {
_id: 1,
spells: 1,
name: 1,
maxDamage: {$max: '$damages'}
}
},
// do the sorting
{
$sort: {'maxDamage' : -1}
}
Find below a complete example
'use strict';
const mongoose = require('mongoose');
const Schema = mongoose.Schema;
mongoose.connect('mongodb://localhost/lotr');
const db = mongoose.connection;
db.on('error', console.error.bind(console, 'connection error:'));
db.once('open', () => {
let SpellSchema = new Schema({
name : { type: String },
damages : { type: Number }
});
let Spell = mongoose.model('Spell', SpellSchema);
let WizardSchema = new Schema({
name: { type: String },
spells: [{ type: Schema.Types.ObjectId, ref: 'Spell' }]
});
let Wizard = mongoose.model('Wizard', WizardSchema);
let fireball = new Spell({
name: 'Fireball',
damages: 20
});
let frozenball = new Spell({
name: 'Frozenball',
damages: 10
});
let lightball = new Spell({
name: 'Lightball',
damages: 15
});
let spells = [fireball, frozenball, lightball];
let wizards = [{
name: 'Gandalf',
spells:[fireball]
}, {
name: 'Saruman',
spells:[frozenball]
}, {
name: 'Radagast',
spells:[lightball]
}];
let aggregation = [
{
$match: {}
},
// find all spells in the spells collection related to wizards and fill populate into wizards.spells
{
$lookup: {
from: 'spells',
localField: 'spells',
foreignField:'_id',
as: 'spells'
}
},
{
$project: {
_id: 1,
name: 1,
// project the values from damages in the spells array in a new array called damages
damages: '$spells.damages',
spells: {
name: 1,
damages: 1
}
}
},
// take the maximum damage from the damages array
{
$project: {
_id: 1,
spells: 1,
name: 1,
maxDamage: {$max: '$damages'}
}
},
// do the sorting
{
$sort: {'maxDamage' : -1}
}
];
Spell.create(spells, (err, spells) => {
if (err) throw(err);
else {
Wizard.create(wizards, (err, wizards) =>{
if (err) throw(err);
else {
Wizard.aggregate(aggregation)
.exec((err, models) => {
if (err) throw(err);
else {
console.log(models[0]); // eslint-disable-line
console.log(models[1]); // eslint-disable-line
console.log(models[2]); // eslint-disable-line
Wizard.remove().exec(() => {
Spell.remove().exec(() => {
process.exit(0);
});
});
}
});
}
});
}
});
});
here's the sample of mongoose doc.
var PersonSchema = new Schema({
name: String,
band: String
});
var BandSchema = new Schema({
name: String
});
BandSchema.virtual('members', {
ref: 'Person', // The model to use
localField: 'name', // Find people where `localField`
foreignField: 'band', // is equal to `foreignField`
// If `justOne` is true, 'members' will be a single doc as opposed to
// an array. `justOne` is false by default.
justOne: false,
options: { sort: { name: -1 }, limit: 5 }
});