Questions tagged [aggregation-framework]
The MongoDB Aggregation Framework offers a powerful solution for manipulating and consolidating data within MongoDB 2.2+.
Here is an array containing objects: item1 = { name:'item', val:1, list:[ {type:'a',value:1}, {type:'b',value:1}, {type:'c',value:1} ] }; item2 = { name:'item', val:5, list:[ ...
People Database: [ { "_id": ObjectId("5f3258cfbaaccedaa5dd2c96"), "gender": "male", "name": { "title": "mr", "first": "victor", " ...
Today's challenge involves retrieving user subscriptions within specific time frames: Today This Week This Month This Year Within these time periods, the goal is to show the $group of all possible dates. [ { Dates: '2020-05-21', Count: 3, AverageInco ...
Is there a way to pass parameters to the aggregation process? I am receiving parameters and attempting to use the $match operator, but the query is returning an empty array: app.get('/api/:name', function(req, res){ var name = req.params ...
My schema includes a reference to another schema. Here are the details: exports.Policies = new mongoose.Schema({ name: String, description: String, exploits: [ {type : mongoose.Schema.ObjectId, ref : 'exploit', required: true} ] }); exports.explo ...
Not only does my Mongo view return a filtered set of documents to the end user, but it also runs a couple of functions to calculate running totals. Strangely though, while my find() operation is blazingly fast (225ms), this additional aggregation process t ...
Seeking guidance on fetching and summing up the values of the "caseCount" objects within a schema. Can anyone provide me with assistance in accomplishing this task? Feel free to ask for further details if needed. Thank you! This is the Schema: const Profi ...
I am in the process of developing a more advanced hello world application using express and mongoose. Let's assume I have the following Schemas: const pollOptionsSchema = new Schema({ name: String, votes: { type: Number, default: 0 } }); co ...
Let's say I have a users collection with the following documents: { _id: 1, hobbies: ['eat', 'read', 'swim'] }, { _id: 2, hobbies: ['eat', 'sl ...
I am looking to calculate the average rating for products based on comments rate. Specifically, I aim to add an additional property to the product object in response when the client calls the get all product API. Below is an example of my product schema. ...
After encountering a similar problem to the one described by the author in this question, I found a solution provided by another user on Stack Overflow: Unwind empty array in mongodb However, after updating my MongoDB/Mongoose recently, I am now facing a ...
When using aggregate in node.js, my code looks like this: collection.aggregate( { $group : { _id : "$id_page", "count" : {$sum : 1} } }, {$sort : {"count" : -1}}, {$limit : 1} ).limit(1).toArray(f ...
In my collection structure, I have the following data: [{ "_id": "....", "name": "aaaa", "level_max_leaves": [{ level: "ObjectIdString 1", max_leaves: 4, }] }, { "_id": "....", "name": "bbbb", "level_max_leaves ...
Attempting to replace a standard mongo call with an aggregate call. The original code that was functional is as follows: const account = await userModel .findOne({ 'shared.username': username }) .exec(); console.log(account._id) The n ...
Below are the schemas for two different collections. var activitySchema = new Schema({ activity_id: {type: String, index: {unique: true}, required: true}, begin_date : String, ... }) var registrationSchema = new Schema({ activit ...
I am managing a collection of products and a collection of brands, where each product is associated with a brand. I aim to retrieve each product along with its corresponding brand information. Products Collection: { "_id" : ObjectId("64 ...
{ $lookup: { from: "website", "let": { "pid": "$data" }, "pipeline": [ { "$match": { "$expr": { "$in": [ "$doc_id", "$$pid" ] ...
My goal is to query the database for documents and if a certain field is not set, I want to replace it with a custom value. Let's say I have a collection of songs in my database where some have 'pathToCover' set and some don't. In those cases where it's no ...
content of the document is provided below chatid:121212, messages:[ { msg:'Hello', time:'2021-04-17T16:35:25.879Z' }, . . . ] I am looking to retrieve all records where the timestamp is earlier than a ...
Suppose I have a document with the following structure: { selectedId: ObjectId("57b5fb2d7b41dde99009bc75"), children: [ {_id: ObjectId("57b5fb2d7b41dde99009bc75"), val: 10}, {_id: ObjectId("57b5fb2d7b41dde99009bc75"), val: 20}, ...
Within my collection, there is an example document structured as follows: { "_id" : ObjectId("5bbb299f06229dddbaab553b"), "phone" : "+38 (031) 231-23-21", "date_call" : "2018-10-08", "adress_delivery" : "1", "quantity_concrete" : "1", ...
I currently possess the following assortment: { "_id" : ObjectId("5acdb95d5ea63a27c1facf92"), "venue" : ObjectId("5acdb95d5ea63a27c1facf8c"), "author" : ObjectId("5ac8ba3582c2345af70d4658"), } { "_id" : ObjectId("5acdb95d5ea63a27c1facf93") ...
I have created a Mongoose aggregation to filter values from the database and return them sorted by frequency. The goal is to extract unique partners from multiple documents, sorting them based on how often they appear in the collection. For example: { ...