Enroll.updateOne(
{
"reviewers._id": userID,
},
{
$set: {
"reviewers.$.scores": req.body.scores,
},
},
(errUpdate, resultUpdate) => {
if (errUpdate) {
return res.status(500).json({ success: false, error: errUpdate });
} else {
return res.status(200).json({ success: true, data: resultUpdate });
}
}
);
I'm new to mongodb. Above is a function within an api that is used to update certain data.
The schema of Enroll would look like this:
[
{
_id: xxxxx,
otherdata: xxxx,
reviewers: [ { _id: xxxx, otherdata: xxxx } , { _id: xxxx2, otherdata: xxxx2 } ]
},
{
second enroll item...
}
]
but when I called the api, it returns n:0 which indicates no match is found. Am I missing some steps here?
Related
I'm trying to receive the user location and store it in the database. Also, the user can choose if he wants to save all his previous locations or not.
So I have created a boolean variable historicEnable: true/false.
So when the historicEnable is true, I want to push to historicLocation[] array in the UserSchema and if it is false, I want just to update currentLocation[] array in the UserSchema.
conntrollers/auth.js
exports.addLocation = asyncHandler(async (req, res, next) => {
const {phone, location, status, historicEnable} = req.body;
let theLocation;
if (historicEnable== true){
theLocation = await User.findOneAndUpdate(
{ phone },
{ $push:{ locationHistoric: location, statusHistoric: status }},
{ new: true }
)
} else if(historicEnable== false){
theLocation = await User.findOneAndUpdate(
{ phone },
{ location, status },
{ new: true }
)
}
res.status(200).json({
success: true,
msg: "A location as been created",
data: theLocation,
locationHistory: locationHistory
})
})
models/User.js
...
currentLocation: [
{
location: {
latitude: {type:Number},
longitude: {type:Number},
},
status: {
type: String
},
createdAt: {
type: Date,
default: Date.now,
}
}
],
historicLocation: [
{
locationHistoric: {
latitude: {type:Number},
longitude: {type:Number},
},
statusHistoric: {
type: String
},
createdAt: {
type: Date,
default: Date.now,
}
}
]
Also, not sure how to make the request body so the function works.
req.body
{
"phone": "+1234",
"historicEnable": true,
"loications": [
{
"location": {
"latitude": 25,
"longitude": 35
},
"status": "safe"
}
]
}
To sum up, if historicEnable is true, the data will be pushed in historicLocation, and if it false, to update the currentLocation.
How can I solve this?
You can use an update with an aggregation pipeline. If the historicEnable is known only on db level:
db.collection.update(
{phone: "+1234"},
[
{$addFields: {
location: [{location: {latitude: 25, longitude: 35}, status: "safe"}]
}
},
{
$set: {
historicLocation: {
$cond: [
{$eq: ["$historicEnable", true]},
{$concatArrays: ["$historicLocation", "$location"]},
"$historicLocation"
]
},
currentLocation: {
$cond: [
{$eq: ["$currentLocation", false]},
{$concatArrays: ["$currentLocation", "$location"]},
"$currentLocation"
]
}
}
},
{
$unset: "location"
}
])
See how it works on the playground example
If historicEnable is known from the input, you can do something like:
exports.addLocation = asyncHandler(async (req, res, next) => {
const phone = req.body.phone
const historicEnable= req.body.historicEnable
const locObj = req.body.location.locationHistoric[0];
locObj.createdAt = req.body.createdAt
const updateQuery = historicEnable ? { $push:{ locationHistoric: locObj}} : { $push:{ currentLocation: locObj}};
const theLocation = await User.findOneAndUpdate(
{ phone },
updateQuery,
{ new: true }
)
res.status(200).json({
success: true,
msg: "A location as been created",
data: theLocation,
locationHistory: locationHistory
})
})
Here's my MongoDB post model that I am using with node.js.I want to update the number of likes under each object in comments array i.e number of likes on each comment.How can I increment the number of likes value.
_postid:6045b7a3b0b0423790d6484b
photo:Object
likes:Array
text:"hey there"
comments:Array
0:Object
1:Object
2:Object
_id :6045c9251f99b81ee4dbc0f6
text:"tetstst"
postedBy:6045c36dd8df2f2f00b115d5
likes:0
created:2021-03-08T06:50:13.851+00:00
created:2021-03-08T05:35:31.524+00:00
postedBy:6045116e37280f0970cf63a5
here's what I am trying to do using FindoneandUpdate:
Post.findOneAndUpdate(
model,
{ $inc: { "comments.likes": 1 } },
{ new: true }
).exec((err, result) => {
if (err) {
return res.status(400).json({
error: err,
});
}
res.json(result);
});
};
Here's my post schema that I am using:
text: {
type: String,
required: "Name is required",
},
photo: {
data: Buffer,
contentType: String,
},
likes: [{ type: mongoose.Schema.ObjectId, ref: "User" }],
comments: [
{
text: String,
created: { type: Date, default: Date.now },
postedBy: { type: mongoose.Schema.ObjectId, ref: "User" },
likes: Number,
},
],
If you want to increment the likes for each comment by 1, (I assumed here model to be your query object.)
Post.findOneAndUpdate(
model,
{ $inc: { "comments.$[].likes" : 1 } },
{ new: true }
).exec((err, result) => {
if (err) {
return res.status(400).json({
error: err,
});
}
res.json(result);
});
};
If you want to increment only the first comment in the post,
Post.findOneAndUpdate(
model,
{ $inc: { "comments.0.likes" : 1 } },
{ new: true }
).exec((err, result) => {
if (err) {
return res.status(400).json({
error: err,
});
}
res.json(result);
});
};
If you want to increment likes for a comment posted By 6045c36dd8df2f2f00b115d5
Post.findOneAndUpdate(
{ ...model, { "comments.postedBy": 6045c36dd8df2f2f00b115d5 }},
{ $inc: { "comments.$.likes" : 1 } },
{ new: true }
).exec((err, result) => {
if (err) {
return res.status(400).json({
error: err,
});
}
res.json(result);
});
};
Also Ref: https://docs.mongodb.com/manual/reference/operator/update-array/
router.delete('/deletepost', (req, res) => {
// console.log(req.query.postid)
if (req.query.category === 'forsale') {
ForSalePosts.findById(req.query.postid)
// .then(post => console.log(post))
.deleteOne()
.catch(err => console.log(err))
AllPosts.updateOne({ user: req.query.userid },
{ $pull: { posts: { postid: req.query.postid } } })
.catch(err => console.log(err))
AllPosts.aggregate(
[
{ $match: { user: ObjectId(req.query.userid) } },
{ $unwind: '$posts' },
{ $sort: { 'posts.date': -1 } }
]
)
.then(posts => {
// console.log(posts)
res.json(posts)
})
.catch(err => res.status(404).json({ nopostfound: 'There is no posts' }))
}
})
this is my route. i am trying to delete an item in my document. the item is being deleted however it returns old values. for example :
Allposts has an array with posts:[postid:{type:String}, ...]
I am trying to delete a specific postid by using $pull,
postid is being deleted however when I aggregate the same model, .then(posts=> console.log(posts)) returns old values on first call, doesnt update the component.
EDIT: just realized sometimes it returns the right values but sometimes it returns the old values as well. does anyone know why and what can i do to solve it ?
const mongoose = require('mongoose')
const Schema = mongoose.Schema;
const AllPostsSchema = new Schema({
user: {
type: Schema.Types.ObjectId,
ref: 'users'
},
posts: [{
postid: {
type: String
},
title: {
type: String
},
category: {
type: String
},
subcategory: {
type: String
}, category: {
type: String
},
description: {
type: String
},
name: {
type: String
},
price: {
type: Number
},
email: {
type: String
},
phonenumber: {
type: Number
},
language: {
type: String
},
make: {
type: String
},
model: {
type: Number
},
odometer: {
type: Number
},
condition: {
type: String
},
state: {
type: String
},
town: {
type: String
},
city: {
type: String
},
links: [{ type: String }],
date: {
type: Date,
default: Date.now
}
}]
})
module.exports = AllPosts = mongoose.model('allposts', AllPostsSchema)
REACT FUNCTION CALL :
deletePost = (category, postid) => {
const postinfo = {
category: category.toLowerCase(),
postid: postid,
userid: this.props.auth.user.id
}
this.props.deletePost(postinfo)
}
You need to add options parameter to delete like:
AllPosts.updateOne({ user: req.query.userid },
{
$pull: { posts: { postid: req.query.postid } }
},
{ new: true }
);
This will return the new object after performing the operation. Hope this works for you.
All the mongo queries return partial promise. You have to use .then in order to resolve each promises.
Here you are running all the queries in series without using .then or async-await. So whenever you $pull from AllPosts after that immediately you call the AllPosts aggregate query which sometimes get executed and sometimes it doesn't.
So in order to make it run one by one you have to use either .then or async-await.
router.delete("/deletepost", (req, res) => {
if (req.query.category === "forsale") {
ForSalePosts.findById(req.query.postid)
.deleteOne()
.then(() => {
AllPosts.updateOne(
{ "user": req.query.userid },
{ "$pull": { "posts": { "postid": req.query.postid } } }
)
.then(() => {
AllPosts.aggregate([
{ "$match": { "user": ObjectId(req.query.userid) } },
{ "$unwind": "$posts" },
{ "$sort": { "posts.date": -1 } }
]).then(posts => {
// console.log(posts)
res.json(posts);
});
})
.catch(err =>
res.status(404).json({ "nopostfound": "There is no posts" })
);
});
}
})
I am trying to create a model Users with many-to-many association to itself to allow users to follow another users. In one query I want to retrieve the Users followed by the current user; in another query I want to retrieve the people that follows the current user.
This is my Users model:
module.exports = (sequelize, Sequelize) => {
const Users = sequelize.define(
'Users',
{
id: {
type: Sequelize.INTEGER,
autoIncrement: true,
primaryKey: true,
},
name: {
type: Sequelize.STRING,
},
},
);
Users.associate = function(models) {
Users.belongsToMany(Users, { as: 'following', through: models.UsersUsers });
};
return Users;
};
I declare UsersUsers, just in case I need to add any field there:
module.exports = (sequelize, Sequelize) => {
const UsersUsers = sequelize.define(
'UsersUsers',
{}
);
UsersUsers.associate = function(models) {};
return UsersUsers;
};
Then I query Users as:
models.Users.findOne({
where: {
id: req.params.id,
},
include: [
{
model: models.Users,
as: 'following',
},
],
})
.then((results) => {
return res.send({
User: results,
});
})
.catch((error) => {
return res.send(String(error));
});
And I get this result:
{
"User": {
"id": 1,
"name": "User1",
"following": [
{
"id": 2,
"name": "User2",
"UsersUsers": {
"UserId": 1,
"followingId": 2
}
},
{
"id": 3,
"name": "User3",
"UsersUsers": {
"UserId": 1,
"followingId": 3
}
},
{
"id": 4,
"name": "User4",
"UsersUsers": {
"UserId": 1,
"followingId": 4
}
}
]
}
}
Now the questions:
In my current query, how do I exclude "UsersUsers" from the result? attributes: { exclude: ['UsersUsers'] } did not work…
How do I create a query to retrieve the current user with the users that follows him instead of the users followed by him?
Thanks!
--
EDIT:
The solution for the question 1. is to add through: { attributes: [] } to the included model:
models.Users.findOne({
where: {
id: req.params.id,
},
include: [
{
model: models.Users,
as: 'following',
through: {
attributes: [],
},
},
],
})
.then((results) => {
return res.send({
User: results,
});
})
.catch((error) => {
return res.send(String(error));
});
Still pending question 2!
Users.findAll({
include: [
{
model: models.Users,
as: 'following',
through: {
attributes: [],
},
},
],
where : {
id : [connection.literal(` write raw sql query to get followingId here`)]
}
})
.then(result => {
res.json(result);
}).catch(error=>{
res.json(error);
});
I'm not sure if this gonna work, still play around this and do let me know if this worked or if you found any solution.
I got it to work on accident with out adding a res.json(doc) but I found that when I make a POST request I need to send a response and ever since I added that response I get 0 or null?
add: function(req, res) {
//var newPlayer = new models.Team({ _id: req.params.tid }, { players: req.body });
models.Team.update({ _id: req.params.tid }, { $addToSet: { players: req.body} }, function(err, newPlayer){
if (err) {
res.json({error: 'Error.'});
} else {
res.json(newPlayer);
}
});
},
Also tried with findOneAndUpdate but my POST request is showing 0 or null for the response.
I am updating an array of objects inside a collection, it's nested. Here is the SCHEMA just to be clear.
var Team = new Schema({
team_name: { type: String },
players: [
{
player_name: { type: String },
points: { type: Number },
made_one: { type: Number },
made_two: { type: Number },
made_three: { type: Number },
missed_one: { type: Number },
missed_two: { type: Number },
missed_three: { type: Number },
percentage: { type: Number },
assists: { type: Number },
rebounds: { type: Number },
steals: { type: Number },
blocks: { type: Number },
fouls: { type: Number },
feed: { type: String },
facebook_id: { type: Number }
}
]
});
So my question is does anyone have any idea why I am getting that response 0?
The update method does not return the document in the response. The callback arguments are (err, numAffected) where numAffected is the number of documents touched by the "update" statement, which can possibly do "bulk" ( or multi ) processing.
What you want is findByIdAndUpdate() or findOneAndUpdate(). These methods return the either the original document or the modified document, according to the arguments you give.
add: function(req, res) {
models.Team.findByIdAndUpdate(
req.params.tid,
{ $addToSet: { players: req.body } },
function(err, newPlayer){
if (err) {
res.json({error: 'Error.'});
} else {
res.json(newPlayer);
}
}
);
},