I'm developing internet store and have been facing next problem. I've got next ProductCategory schema
const ProductCategorySchema = new Schema({
_RANGE_START_: Number,
_RANGE_END_: Number
});
Here is Product schema
const productSchema = new Schema({
_ID_: Number,
_SORT_: Number,
_ART_: String,
});
For example, field _RANGE_START_ = 65000, field _RANGE_END_ = 66000, both of fields are numbers.
Product field SORT = 65302.
The question is, how can I query the database to get categories of product?
I have been trying next queries:
const productCategory = await ProductCategory.find({
// First
$where: `this._RANGE_START_ >= ${product._SORT_} || this._RANGE_END_ < ${product._SORT_}`,
// Second
$and: [
{
_RANGE_START_: {
$gte: product._SORT_,
},
},
{
_RANGE_END_: {
$lte: product._SORT_,
},
},
],
// Third
_RANGE_START_: {
$gte: product._SORT_,
},
_RANGE_END_: {
$lte: product._SORT_,
},
});
With all options I've got empty array
const ProductCategorySchema = new Schema({
_RANGE_START_: Number,
_RANGE_END_: Number
});
var RANGE={
sort:65300,
};
product.find({$and:[{$or:[{_RANGE_START:{$gte:RANGE.sort}},{_RANGE_END:{$lte:RANGE.sort}}]}]},function(err,data){
console.log('adad',data);
});
Related
I'm trying to make a notation system for movies
A user can note a Movie in their List.
Whenever the user clicks on the frontend, the listId, movieId, note are sent to the server to update the note. The note can be set to null, but it does not remove the entry from the list.
But if the user clicks too much times, the movie's totalNote and nbNotes are completely broken. Feels like there is some sort of concurrency problems ?
Is this the correct approach to this problem or am I updating in a wrong way ?
The mongoose schemas related :
// Movie Schema
const movieSchema = new Schema({
// ...
note: { type: Number, default: 0 },
totalNotes: { type: Number, default: 0 },
nbNotes: { type: Number, default: 0 },
})
movieSchema.statics.updateTotalNote = function (movieId, oldNote, newNote) {
if (!oldNote && !newNote) return
const nbNotes = !newNote ? -1 : (!oldNote ? 1 : 0) // If oldNote is null we +1, if newNote is null we -1
return Movie.findOneAndUpdate({ _id: movieId }, { $inc: { nbNotes: nbNotes, totalNotes: (newNote - oldNote) } }, { new: true }).catch(err => console.error("Couldn't update note from movie", err))
}
// List Schema
const movieEntry = new Schema({
_id: false, // movie makes an already unique attribute, which is populated on GET
movie: { type: Schema.Types.ObjectId, ref: 'Movies', required: true },
note: { type: Number, default: null, max: 21 },
})
const listSchema = new Schema({
user: { type: Schema.Types.ObjectId, ref: 'Users', required: true },
movies: [movieEntry]
})
The server update API (add / Remove movieEntry are similar with $push and $pull instead of $set)
exports.updateEntry = (req, res) => {
const { listId, movieId } = req.params
const movieEntry = { movieId: movieId, note: req.body.note }
List.findOneAndUpdate({ _id: listId, 'movies.movie': movieId }, { $set: { 'movies.$[elem]': movieEntry } }, { arrayFilters: [{ 'elem.movie': movieId }] })
.exec()
.then(list => {
if (!list) return res.sendStatus(404)
const oldNote = list.getMovieEntryById(movieId).note // getMovieEntryById(movieId) = return this.movies.find(movieEntry => movieEntry.movie == movieId)
Movie.updateTotalNote(movieId, oldNote, movieEntry.note)
let newList = list.movies.find(movieEntry => movieEntry.movie == movieId) // Because I needed the oldNote and findOneAndUpdate returns the list prior to modification, I change it to return it
newList.note = movieEntry.note
newList.status = movieEntry.status
newList.completedDate = movieEntry.completedDate
return res.status(200).json(list)
})
.catch(err => {
console.error(err)
return res.sendStatus(400)
})
}
The entries I needed to update were arrays that could grow indefinitely so I had to first change my models and use virtuals and another model for the the list entries.
Doing so made the work easier and I was able to create, update and delete the entries more easily and without any concurrency problems.
This might also not have been a concurrency problem in the first place, but a transaction problem.
so basically I have this and I am trying to update the STATUS part of an array.
However, everything I try does nothing. I have tried findOneAndUpdate also. I am trying to identify the specific item in the array by the number then update the status part of that specific array
(Sorry for formatting, I have no idea how to do that on the site yet ...) (Full code can be found here: https://sourceb.in/0811b5f805)
Code
const ticketObj = {
number: placeholderNumber,
userID: message.author.id,
message: m.content,
status: 'unresolved'
}
let tnumber = parseInt(args[1])
let statuss = "In Progress"
await Mail.updateOne({
"number": tnumber
}, { $set: { "status": statuss } })
Schema
const mongoose = require('mongoose')
const mailSchema = new mongoose.Schema({
guildID: { type: String, required: true },
ticketCount: { type: Number, required: true },
tickets: { type: Array, default: [] }
}, { timestamps: true });
module.exports = mongoose.model('Mail', mailSchema)
You need to use something like Mail.updateOne({"guildID": message.guild.id}, {$set: {`tickets.${tnumber}.status`: statuss}})
or for all objects in array:
Mail.updateOne({"guildID": message.guild.id}, {$set: {'tickets.$[].status': statuss}})
Also, you need to create a schema for the tickets, as it is described in docs:
one important reason to use subdocuments is to create a path where there would otherwise not be one to allow for validation over a group of fields
Consider, I have these three example schema
Where mainScheam is the actual document and other schemas ("activitySchema", "essentialSchema") are sub-documents.
I have used pseudo types in Schemas just for example purpose and clear understanding
Schemas
let activitySchema = new Schema({
"_id":ObjectID,
"title":string,
"created_at":new Date(),
"created_by":ObjectID,
});
let essentialSchema = new Schema({
"_id":ObjectID,
"activity":[activitySchema],
"created_at":new Date(),
"created_by":ObjectID,
});
let mainSchema = new Schema({
"_id":ObjectID,
"name":string,
"activity":[activitySchema],
"essential":[essential],
"created_at": new Date(),
"created_by":ObjectID,
});
let Main = mongoose.model("main", mainSchema);
Main Document in Database is similar to this
{
"id":"...",
"name":"rpc",
"activity":[{
"_id":"...",
"title":"abc de",
"created_at":12345...,
"created_by":"...",
}, {
"_id":"...",
"title":"defg",
"created_at":12467...,
"created_by":"...",
}],
"essential":[{
"_id":"...",
"activity":[{
"_id":"...",
"title":"usidl kdsl",
"created_at":2128...,
"created_by":"...",
}],
"created_at":2125...,
"created_by":"...",
}],
"created_at":2105...,
"created_by":"...",
}
Now I have to find out the latest/recent activity from the above mainSchema and sub documents
From above example I have to return sorted activity according to created_at time.
{
"_id":"...",
"title":"usidl kdsl",
"created_at":2128...,
"created_by":"...",
}
I am using aggregate but don't know how to achieve my goal?
const mains = await Main.aggregate([
{
$project:{
"name":"$name",
"last_activity":sort("$activity", "$essential.activity"), //-- This is the part where I don't know what to do
"created_at":"$created_at",
},
}
]);
I'm using findOneAndUpdate() with upsert: true in order for a document to be updated if it exists and to be created otherwise. The tracks variable contains an array of Track instances. tracks does contain a few duplicates and that's where the problem begins. It causes the piece of code on line 7 (Observation.findOneAndUpdate(...)) to create a (low) number of duplicates, i.e. multiple documents that have the same (user, track) pair. Note that those duplicates are inserted randomly: running twice this piece of code brings different duplicated documents. My guess is that it has something to do with how the locking of data is done in MongoDB and that I'm doing too many operations at the same time. Any idea on how I could overcome this problem?
const promises = [];
tracks.forEach((track) => {
const query = { user, track };
const options = { new: true, upsert: true };
const newOb = { user, track, type: 'recent' };
promises.push(Observation.findOneAndUpdate(query, newOb, options));
});
return Promise.all(promises);
I'm using mongoose 5.5.8 and node 11.10.0.
Here's the Observation model:
const { Schema } = mongoose;
const ObservationSchema = new Schema({
track: { type: Schema.Types.ObjectId, ref: 'Track' },
user: { type: Schema.Types.ObjectId, ref: 'User' },
type: String
});
ObservationSchema.index({ track: 1, user: 1 }, { unique: true });
const Observation = mongoose.model('Observation', ObservationSchema);
And this is a sample of what the tracks array contains:
[
{ artists: [ 5da304b140185c5cb82d7eee ],
_id: 5da304b240185c5cb82d7f48,
spotifyId: '4QrEErhD78BjNFXpXDaTjH',
__v: 0,
isrc: 'DEF058230916',
name: 'Hungarian Dance No.17 In F Sharp Minor',
popularity: 25 },
{ artists: [ 5da304b140185c5cb82d7eee ],
_id: 5da304b240185c5cb82d7f5d,
spotifyId: '06dn1SnXsax9kJwMEpgBhD',
__v: 0,
isrc: 'DEF058230912',
name: 'Hungarian Dance No.13 In D',
popularity: 25 }
]
Thanks :)
I think this is due to your Promise.all method.
You should await every single query in the loop instead of awaiting everything at the same time at the end. Here an example with find:
async function retrieveApples() {
const apples = [];
arr.forEach(apple => {
const foundApple = await AppleModel.findOne({ apple });
apples.push(foundApple);
});
return apples
}
I have a problem and I can´t find a solution. I have some MongoSchemas where I store Geolocation from users. Mobile Phone is sending me longitude and latitude every 5 minutes. This API is working perfectly.
Mongo-Schema looks like:
// Importing Node packages required for schema
const mongoose = require('mongoose');
const Schema = mongoose.Schema;
//= ===============================
// User Schema
//= ===============================
const GeolocationSchema = new Schema({
loc: {
type: { type: String },
coordinates: { type: [Number], index: '2dsphere' }
},
user: { type: Schema.Types.ObjectId, ref: 'User' }
},
{
timestamps: true
});
module.exports = mongoose.model('Geolocation', GeolocationSchema);
Now, I want to calculate users-nearby which have an "updateAt"-timestamp not even longer than 5 minutes in the past. That means that one or more users can be in a distance of e.g. 500m until 5 minutes in the past. This should be a match. For this I use Mongo aggregate, and I want to iterate the callback-result and extract the user._id out of the result to build a match.
This is what I tried:
const Geolocation = require('../models/geolocation')
User = require('../models/user'),
config = require('../config/main');
exports.setGeolocation = function (req, res, next) {
// Only return one message from each conversation to display as snippet
console.log(req.user._id);
var geoUpdate = Geolocation.findOneAndUpdate( { user: req.user._id },
{ loc: {
type: 'Point',
coordinates: req.body.coordinates.split(',').map(Number)
},
user: req.user._id
},
{upsert: true, new: true, runValidators: true}, // options
function (err, doc) { // callback
if (err) {
console.log(err);
}
});
// create dates for aggregate query
var toDate = new Date( (new Date()).getTime());
var fromDate = new Date( (new Date()).getTime() - 5000 * 60 );
var match = Geolocation.aggregate([
{
$geoNear: {
near: {
type: "Point",
coordinates: req.body.coordinates.split(',').map(Number)
},
distanceField: "dist.calculated",
maxDistance: 500,
includeLocs: "dist.location",
uniqueDocs: true,
query: { user: {$ne: req.user._id } , updatedAt: { $gte: fromDate,$lte: toDate }},
num: 5,
spherical: true
}
}], function (err, doc){
//here I´m going in trouble correctly parsing doc
var str = JSON.stringify(doc);
var newString = str.substring(1, str.length-1);
var response = JSON.parse(newString);
console.log(response.user);
});
res.sendStatus(200);
};
As you can see I´m going in trouble in parsing the "doc"-callback to iterate over the documents. If I want to parse it as jSON I´m getting an token-error on position 1. If I have more than 2 results, I´m getting an error on position 288.
That´s why I tried to parse and stringify the "doc". But this is not working correctly.
Maybe, someone could help me with a solution. I´m not familiar with mongo-functions because I´m starting with it, maybe there is a better solution but I can´t find something else to calculate geoNear and iterate afterwards over the results.
Thx at all who can help...