Related
Hello since there is not subcollections in mongodb i have found that you can nest document as an array ! i did that and it worked but what i want is to add a field to that existing array without losing the old ones ! i can do that by fetching the old array and adding the new field to it and returning that array but doing the fetch inside the patch method wouldn't be a good approach ! so is there any other way i can make that happen ?
Modal :
const mongoose = require("mongoose");
const notificationSchema = new mongoose.Schema(
{
notificationType: {
type: String,
required: false,
},
message: { type: String, required: true },
},
{
timestamps: true,
}
);
const userSchema = new mongoose.Schema({
name: {
type: String,
required: true,
},
email: {
type: String,
required: true,
},
passwordHash: {
type: String,
required: true,
},
phone: {
type: String,
required: true,
},
isAdmin: {
type: Boolean,
default: false,
},
street: {
type: String,
default: "",
},
notifications: [notificationSchema],
apartment: {
type: String,
default: "",
},
zip: {
type: String,
default: "",
},
city: {
type: String,
default: "",
},
country: {
type: String,
default: "",
},
});
exports.User = mongoose.model("User", userSchema);
exports.Notification = mongoose.model("Notification", notificationSchema);
router.patch("/:id", async (req, res) => {
try {
console.log("hh");
const user = await User.findByIdAndUpdate(req.params.id, {
notifications: [
{
notificationType: "Order",
message: "New Notification",
},
],
});
if (!user) {
return res.status(404).send("The user cannot be found");
}
res.send(user);
} catch (error) {
return res.status(400).json({ success: false, error });
}
});
I'm quiet new to mongodb and I'm actually trying to implement a follow-unfollow method in the backend
there are two types of users in the database
Mentors and mentees
only mentees can follow the mentors and mentors can only accept the request
the schema
Mentors
const MentorsSchema = mongoose.Schema({
name: { type: String, required: true },
designation: { type: String, required: true },
yearNdClass: {
type: String,
required: ["true", "year and class must be spciefied"],
},
respondIn: { type: String, required: true },
tags: {
type: [String],
validate: (v) => v == null || v.length > 0,
},
socialLinks: {
github: { type: String, default: "" },
twitter: { type: String, default: "" },
facebook: { type: String, default: "" },
instagram: { type: String, default: "" },
},
watNum: { type: Number, required: true },
email: { type: String, required: true, unique: true },
password: { type: String, required: true },
about: { type: String },
followers: [
{ type: mongoose.Schema.Types.ObjectId, ref: "Mentees", default: "" },
],
pending: [
{ type: mongoose.Schema.Types.ObjectId, ref: "Mentees", default: "" },
],
});
Mentee
const MenteeSchema = mongoose.Schema({
name: { type: String, required: true },
email: { type: String, required: true, unique: true },
password: { type: String, required: true },
yearNdClass: {
type: String,
required: ["true", "year and class must be spciefied"],
},
socialLinks: {
github: { type: String },
twitter: { type: String },
facebook: { type: String },
instagram: { type: String },
},
about: { type: String },
skillLooksFor: { type: String, required: true },
watNum: { type: Number, required: true },
following: [{ type: mongoose.Schema.Types.ObjectId, ref: "Mentors",default:"" },
],
});
you can see that there are two fields for mentors both following and pending arrays which consist of the ids of the mentees who follow the mentors and the ids of the mentees which yet to be accepted as a follower
I planned to create an endpoint where when a mentee gives a follow request it should be reached into the mentor pending array so that he can accept it later
so my logic like this
// #desc follow a mentor
// #route POST /api/mentees/follow-mentor/:id
// #access private
menteeRoute.post(
"/follow-mentor/:id",
isAuthorisedMentee,
expressAsyncHandler(async (req, res) => {
const { id } = req.params;
const mentee = await Mentees.findById(req.mentee.id);
const mentor = await Mentors.findById(id).select("-password");
// console.log(mentor)
if (mentee) {
try {
await Mentees.findOneAndUpdate(
{ _id: mongoose.Types.ObjectId(id) },
{ $addToSet: { "following.0": mentor._id } },
{ new: true }
);
await Mentors.findOneAndUpdate(
{ _id: mongoose.Types.ObjectId(mentor._id) },
{
$addToSet: {
"pending.0": id,
},
},
{ new: true },
);
res.json({
data: {
mentor,
mentee,
},
});
} catch (error) {
console.log(error);
throw new Error(error);
}
}
})
);
but the code didn't work.
can anyone help me to resolve the problem?
basically, when a mentee gives a follow request it should update the following array of mentee with the id of mentor and it should also update the pending array of mentor with the id of the mentee
PS: any alternative ideas are also welcome
Try to remove the .0 index and use the $push method.
Also, you should return the updated objects:
menteeRoute.post(
'/follow-mentor/:id',
isAuthorisedMentee,
expressAsyncHandler(async (req, res) => {
const { id } = req.params;
const mentee = await Mentees.findById(req.mentee.id);
const mentor = await Mentors.findById(id).select('-password');
// console.log(mentor)
if (mentee) {
try {
const updatedMentee = await Mentees.findOneAndUpdate(
{ _id: mongoose.Types.ObjectId(id) },
{ $push: { following: mentor._id } },
{ new: true }
);
const updatedMentor = await Mentors.findOneAndUpdate(
{ _id: mentor._id },
{
$push: {
pending: id,
},
},
{ new: true }
);
res.json({
data: {
mentor: updatedMentor,
mentee: updatedMentee,
},
});
} catch (error) {
console.log(error);
throw new Error(error);
}
}
})
);
router.put('/experience/update/:exp_id',
auth,
async (req, res) => {
const {
title,
company,
location,
from,
to,
current,
description
} = req.body;
const newExp = {};
newExp._id = req.params.exp_id;
if (title) newExp.title = title;
if (company) newExp.company = company;
if (location) newExp.location = location;
if (from) newExp.from = from;
if (to) newExp.to = to;
if (current) newExp.current = current;
if (description) newExp.description = description;
try {
let profile = await Profile.findOne({ user: req.user.id });
if (profile) {
//UPDATE Experience
profile = await Profile.findOneAndUpdate(
{ user: req.user.id });
const updateIndex = profile.experience.map(exp => exp._id).indexOf(req.params.exp_id);
profile.experience[updateIndex] = newExp;
console.log('Experience updated!')
}
await profile.save();
res.json(profile);
} catch (error) {
console.log(error.message);
res.status(500).send('Internal Server Error');
}
}
)
I am using the findOneAndUpdate method to update the experience field inside a profile mongoose model.
After accesssing the endpoint, I put the updated details, for eg. company and location. But I lose all the other fields. So how can I update only select fields while others remain unchanged ?
Below is the profile schema:
const mongoose = require('mongoose');
const ProfileSchema = new mongoose.Schema({
user: {
type: mongoose.Schema.Types.ObjectId,
ref: 'user'
},
company: {
type: String
},
website: {
type: String
},
location: {
type: String
},
status: {
type: String,
required: true
},
skills: {
type: [String],
required: true
},
bio: {
type: String
},
githubusername: {
type: String
},
experience: [
{
title: {
type: String,
required: true
},
company: {
type: String,
required: true
},
location: {
type: String
},
from: {
type: Date,
required: true
},
to: {
type: Date,
},
current: {
type: Boolean,
default: false
},
description: {
type: String,
}
}
],
education: [
{
school: {
type: String,
required: true
},
degree: {
type: String,
required: true
},
fieldofstudy: {
type: String,
required: true
},
from: {
type: Date,
required: true
},
to: {
type: Date,
required: true
},
current: {
type: Boolean,
default: false
},
description: {
type: String,
}
}
],
social: {
youtube: {
type: String,
},
twitter: {
type: String,
},
facebook: {
type: String,
},
linkedIn: {
type: String,
},
instagram: {
type: String,
}
},
date: {
type: Date,
default: Date.now
}
});
module.exports = Profile = mongoose.model('profile', ProfileSchema);
There are some problems in your code.
You are passing only one argument to findOneAndUpdate. Ideally the syntax is findOneAndUpdate(filter, update). So basically you need to pass update query as 2nd argument.
profile = await Profile.findOneAndUpdate(
{ user: req.user.id });
In below code you are modifying the profile object and saving it. Which is not required. And this is also the reason why you are losing fields.
const updateIndex = profile.experience.map(exp => exp._id).indexOf(req.params.exp_id);
profile.experience[updateIndex] = newExp;
console.log('Experience updated!')
}
await profile.save();
Solution-
We need to figure out the update part of findOneAndUpdate(filter, update).
Here is the update query -
db.collection.update({
"user": "5f96dc85ac5ae03160a024a8",
"experience._id": "5f9826c3a3fa002ce0f11853"
},
{
"$set": {
"experience.$": {
"current": false,
"_id": "5f9826c3a3fa002ce0f11853",
"title": "Senior developer",
"company": "Morgan Stanley",
"location": "Pune",
"from": "2017-04-30T18:30:00.000Z",
"to": "2020-07-08T18:30:00.000Z",
"description": "testing"
}
}
})
Try it here
Trying Mongoose way :
const filter = { user: req.user.id, "experience._id": req.params.exp_id }
const update = { $set: { "experience.$": newExp } }
profile = await Profile.findOneAndUpdate(filter,update);
I have a very simple "social network" app: users can register, write posts, like/unlike them and comment a post.
I have a probleme with my Post Schema :
const mongoose = require("mongoose");
const Schema = mongoose.Schema;
// Create Schema
const PostSchema = new Schema({
user: {
type: Schema.Types.ObjectId,
ref: "user",
},
text: {
type: String,
required: true,
},
name: {
type: String,
},
avatar: {
type: String,
},
likes: [
{
user: {
type: Schema.Types.ObjectId,
ref: "user",
},
},
],
comments: [
{
user: {
type: Schema.Types.ObjectId,
ref: "user",
},
},
{
text: {
type: String,
required: true,
},
},
{
name: {
type: String,
},
},
{
avatar: {
type: String,
},
},
{
date: {
type: Date,
default: Date.now,
},
},
],
date: {
type: Date,
default: Date.now,
},
});
module.exports = Profile = mongoose.model("post", PostSchema);
When I receive my POST request for comments...
// #route POST api/posts/comment/:id
// #desc Add comment to post
// #access Private
router.post(
"/comment/:id",
passport.authenticate("jwt", { session: false }),
(req, res) => {
const { errors, isValid } = validatePostInput(req.body);
// Check Validation
if (!isValid) {
// If any errors, send 400 with errors object
return res.status(400).json(errors);
}
Post.findById(req.params.id)
.then(post => {
const newComment = {
text: req.body.text,
name: req.body.name,
avatar: req.body.avatar,
user: req.user.id,
};
console.log("newComment: ", newComment);
// Add to comments array
post.comments.unshift(newComment);
console.log("post: ", post.comments);
// Save
post.save().then(post => res.json(post));
})
.catch(err => res.status(404).json({ postnotfound: "No post found" }));
},
);
The only fields that are saved in the post.comments array is the User. Not the other fields (text, name, avatar, date).
My console.log("newComment: ", newComment); properly returns the complete object with all its properties but then, 2 lines below, console.log("post: ", post.comments); only returns the comment _id and the user and those are the only fields saved in the DB...
What did I miss here?
There is some Problem in the creation of the schema structure, this is the correct way:
comments: [
{
user: {
type: Schema.Types.ObjectId,
ref: "user",
},
text: {
type: String,
required: true,
},
name: {
type: String,
},
avatar: {
type: String,
},
date: {
type: Date,
default: Date.now,
},
}
]
the valid structure is nothing but like this(showing the changes made above):
comments: [{
user: {},
text: {},
// others...
}]
Everytime I hit api I am getting same error-
I have tried sending value as parameters also but failed. Any help would be appreciated. When i use $set it updates same value everytime the web service is called but it does work but not with $push.
MongoError: The field 'songId' must be an array but is of type objectId in document
{_id: ObjectId('59709590380026118c22dd61')}
My Playlist schema code:-
var PlaylistSchema = new mongoose.Schema({
name: String,
coverphoto: { type: String, default: '' },
userId: {
type: ObjectId,
ref: 'User'
},
songId: [{ type: ObjectId, ref: 'Song' }],
updated_at: { type: Date, default: Date.now },
});
my Song Schema code
var mongoose = require('mongoose');
var Schema = mongoose.Schema,
ObjectId = Schema.ObjectId;
var SongSchema = new mongoose.Schema({
audioName:{type:String,default:''},
title: String,
// coverphoto: { type: String, default: '' },
singer: { type: String, default: '' },
movie: { type: String, default: '' },
album: { type: String, default: '' },
lyricist: { type: String, default: '' },
actors: { type: String, default: '' },
lyrics: { type: String, default: '' },
genre: { type: String, default: 'Random' },
duration: { type: String, default: '' },
size: { type: String, default: '' },
userId: {
type: ObjectId,
ref: 'User'
},
categoryId: {
type: ObjectId,
ref: 'Category'
},
updated_at: { type: Date, default: Date.now },
});
module.exports = mongoose.model('Song', SongSchema);
My Api code
/* post api to add song in playlist */
router.post('/addSongToPlaylist', function (req, res, next) {
Playlist.findOne({ '_id': req.body.playlistId }, function (err, playlist) {
if (err) return next(err);
console.log(playlist)
console.log("req.body.songId", req.body.songId);
if (playlist) {
Playlist.findByIdAndUpdate(
req.body.playlistId,
{ $push: { "songId": req.body.songId } },
{ new: true },
function (err, playlistData) {
if (err) return next(err);
res.json({ message: 'New Song added successfully', playlist: playlistData, success: true });
});
} else if (!Song) {
res.json({ message: 'Failed to add song', success: false });
}
});
});