Mongoose subdocument array. Mar 6, 2023 · Hi, am new here.

Mongoose subdocument array Mongoose adds a String path called __t to your schemas that it uses to track which discriminator this document is an instance of. com Dec 31, 2023 · In this article, we’ve explored various techniques for finding and updating subdocuments in Mongoose. Arrays of SchemaTypes are also called primitive arrays, and arrays of subdocuments are also called document arrays. May 2, 2019 · Trying to implement conditional statement relying on subdocument array of objects, so i need to iterate over collection of users in database and check inside each user subdocument array of objects Oct 28, 2020 · as you can see, i have a property called studentList is an array and this is how it was store in mongoose Atlas so now i want to delete a subdocument in array studentList so this is my route: Jan 8, 2024 · Discussed in #14243 Originally posted by echo-999 January 8, 2024 I'm trying to create a dynamic ref for an object ID stored inside a property of a subdocument. Whether it’s leveraging basic updates or orchestrating transactions, mastering these updates is essential for the modern developer working with complex data structures. On the latest version of Mongoose, that seems to no longer be the case. // Setup import { Schema, Types, model, Model } from 'mongoose'; May 10, 2020 · Mongoose update subdocument array with subdocument value Asked 5 years, 6 months ago Modified 5 years, 6 months ago Viewed 981 times Oct 8, 2014 · Mongoose - delete subdocument array item Asked 11 years ago Modified 2 years, 3 months ago Viewed 13k times Dec 30, 2023 · This tutorial explains the steps necessary to push an object to an array within a document using Mongoose, the popular MongoDB object data modeling (ODM) library for Node. id(_id); Adding sub-docs to arrays MongooseArray methods such as push, unshift, addToSet, and others cast arguments to their proper types transparently: Removing Subdocs Each subdocument has its own remove method. May 10, 2021 · I have a collection with a nested array of subdocuments. 00:00 Intro00:26 Adding an array Sort by Value To sort the whole array by value, or to sort by array elements that are not documents, identify the input array and specify 1 for an ascending sort or -1 for descending sort in the sortBy parameter. My branch schema const branchSchema = mongoose. I was able to add, delete and display all sub-documents from this array but I found it really difficult to get single object that matches _id criteria in the array. search for the term docArray on this link: Mongoose Discriminator documentation Returns this subdocument's parent array. If you were to sort on two different fields of the top document or on two different fields of a subdocument then it would be fine i guess. Example: const Test = mongoose. So as you note, the default in mongoose is that when you "embed" data in an array like this you get an _id value for each array entry as part of it's own sub-document properties. _i Oct 10, 2015 · 46 Another way to push items into array using Mongoose is- $addToSet, if you want only unique items to be pushed into array. For a single nested subdocument, remove() is equivalent to setting the subdocument to null. Mongoose document arrays have a special id method for searching a document array to find a document with a given _id. _i 4 Click Apply This query filter returns all documents in the sample_training. I currently have 3 schema’s, Year at the topmost level, then a year has a subdocument array of 12months, and then each month has a reference to an envelope. 28 Use $filter aggregation Selects a subset of the array to return based on the specified condition. To shape the output as you describe in the comment, you need to use a $group aggregation. Based on these and other answers here's what I came up with using Spring Boot MongoTemplate. $pop () Pops the array atomically at most one time per document save (). Aug 28, 2019 · The mongoose subdocument documentation lists a number of methods you can call on the parent. Aug 17, 2017 · Using Mongoose (or even just MongoDB queries), I'd like to return results for a query that matches all the documents where both: a) the "units" field (an array of subdocuments) contains a subdocum Mongoose: How to add additional field into subdocument array Asked 6 years, 7 months ago Modified 6 years, 7 months ago Viewed 347 times Aug 15, 2020 · How to loop through mongodb subdocument array find the matching elements and update the element fields with new values at once Jun 25, 2021 · Here is my mongoose schema: const userSchema = new mongoose. The simplest way is to retrieve the document from MongoDB, push new items into the array, and then call the save() method to update the document. The full document, including the entire scores array, is returned. Upvoting indicates when questions and answers are useful. players. node. With a combination of querying strategy and the use of subdocument specific methods, you can manage subdocuments effectively in your applications. 1. The MongoDB way of doing this is the positional $ operator variable, which holds the "matched" position in the May 8, 2022 · An introduction to Mongoose subdocuments and how to write queries to create, update, and remove subdocuments from a parent document. I’m struggling a lot to build a query, it seems I need to use some form of aggregation but I’m really at a loss here-- I just started using mongodb. find 'teams. Feb 20, 2013 · Like a charm, thank you! With mongoose it's even easier because it automatically converts the string into an object id: Game. populate() in the form invoked from the model takes either a document or an array as it's first argument. pull(_id)` parent. Nov 9, 2025 · Why deletion of element of embedded subdocument array using Mongoose JS isn't working? Oct 1, 2025 · MongoDB query with Mongoose - Matching subdocument attribute within an array Asked 7 days ago Modified 7 days ago Viewed 49 times May 3, 2023 · It works. ObjectId; firstName: string; } // Document definition interface User { names: Names[]; } // TMethodsAndOverrides type THydratedUserDocument = { names?: Types. aggregate() to sort the array and/or "re-casting" to mongoose objects after you have done that operation or after doing your own . doc. js. var childSchema = new Schema({ name: 'string' }); var parentSchema = new Schema({ // Array of subdocuments children: [childSchema], // Single nested Subdocuments Subdocuments are documents embedded in other documents. Schema ( { office: [ { multiple of… 7 You can use cursor. 11 ), if you had data inserted in Mongo that contained a subdocument array containing items without _id fields, Mongoose would fill in those fields with new _ids when the document was retrieved. I have an array with reviews, nested 2 levels inside of a model. Dec 10, 2017 · where the $unwind makes a separate document for each element of the array. Example: Returns this subdocument's parent array. id(_id); Adding Subdocs to Arrays Jun 7, 2020 · You can find more details on the mongoose subdocuments docs which explains it in much more detail. In each document, there is an array named “team” and inside this array, I have objects. js application. Thanks for helping! This option only works when the schema is used in a subdocument path or document array path, Mongoose ignores this option if set on the top-level schema for a model. Jul 13, 2015 · Other solutions are possible using either . Dec 7, 2023 · Mongoose - Accessing and removing a subdocument by _ID within an array of objects Asked 1 year, 2 months ago Modified 1 year, 2 months ago Viewed 319 times Jul 31, 2020 · Populate subdocument array field with Mongoose Asked 4 years, 9 months ago Modified 4 years, 9 months ago Viewed 2k times I've just got stuck with this problem. Jul 3, 2020 · If the options is an Array, it will return the first index of that array and wrap it in an array. My mistake was that I didn't put NoteSchema into notes array in UserSchema. To remove a document from a subdocument array we may pass an object with a matching _id. child; // { age: 0 } Finding a Subdocument Each subdocument has an _id by default. sort() on the plain object. By default, Mongoose treats object properties in document interfaces as nested properties rather than subdocuments. Here is how I did it! Dec 10, 2021 · So, without going into other details of my project, I have a collection containing multiple documents. If the options is not an Array or function, for example, if it’s only a plain object such as { type: String, required: true }, it will be returned directly and used as the Mongoose options. Schema ( { user: String, stream: String, author: String, Hi guys i have problem that i fail to solve. I don't have any troubles, with importing/export the Schema and converting it to a Jan 22, 2020 · Mongoose is a library that makes MongoDB easier to use. Caveat: single nested subdocs only work // in mongoose >= 4. The property can reference multiple Apr 3, 2015 · I'd like to push to an array that's within a subdocument in Mongoose/MongoDB. child Jan 23, 2021 · I was able to add, delete and display all sub-documents from this array but I found it really difficult to get single object that matches _id criteria in the array. findOne({'images. Nov 24, 2021 · hobbies is an array of hobbies defined as sub-document Let us now try to understand the subtle difference between sub-document and nested document. Just wont save: The front end sends up a Day object that has an array of headings, and each heading can have a content array (which is a mongoose Apr 10, 2021 · Current behavior I am trying to use nested schemas with Mongoose and Nestjs. grades collection that contain a subdocument in the scores array where type is set to exam. 9, so maybe the issue has already been fixed, but I'm wary of updating because updating can produce similar weird issues. children array, but methods that don't already exist in Javascript for arrays give an error saying they do not exist and it doesn't compile. what i am trying to do is to reference a sub-document and then populate on the . Apr 8, 2024 · If possible, I would later like to edit that cursor to return the subdocument that matches the color, size, and specific inseam. Mar 15, 2021 · Hi Guys I need your help with the following code, I would like to update a subdocument in mongoose Here is the code: const update = await Model. Subdocuments Subdocuments are documents embedded in other documents. Feb 23, 2016 · Here i need to push data to rate_card, but data is not storing in subdocument array, here am getting plan id and trying to push but is not working in server response am getting this { ok: 0, n: 0, nModified: 0 } Nov 17, 2016 · You'll need to complete a few actions and gain 15 reputation points before being able to upvote. js mongodb mongoose mongoose-schema mongoose-populate asked Aug 1, 2021 at 16:10 Adrian 75 9 May 30, 2025 · Mongoose, an Object Data Modeling (ODM) library for Node. Then you use regular findOneAndUpdate and replace the subdocument array there. retainNullValues=false] «boolean» by default, Mongoose removes null and undefined values from populated arrays. aggregate([ { Removing a subdocument from an array The nicest and most complete solution I have found that both finds and removes a subdocument from an array is using Mongoose's $pull method: Here is my problem I have two schemas one nested in another as an array. May 6, 2020 · i have a document which has subdocument array in it (size is 6), then i remove 5 element at the same time, it perfectly updates array, but cant find the document after updated, here the code to upda May 28, 2021 · mongoose - querying for array value in subdocument Asked 3 years, 8 months ago Modified 3 years, 8 months ago Viewed 267 times Use the $pull operator to remove all instances of the a value or values from an array that match a specified condition. And yes, populate works for when you need to reference the docs which are saved in other collections. const yearSchema = new mongoose. player': playerId MongoDB Manual: How to query or select on embedded or nested documents, subdocuments and fields. Mongoose doesn't create getters/setters for array indexes; without them mongoose never gets notified of the change and so doesn't know to persist the new value. const childSchema = new Schema({ name: 'string' }); const parentSchema = new Schema({ // Array of subdocuments children: [childSchema], // Single nested 342 If you have subdocument arrays, Mongoose automatically creates ids for each one. js express mongoose mongoose-schema edited Nov 26, 2020 at 11:05 turivishal 36. Schema({ name: String, email: String, images: [ { fileName: String, location: String, fileExtension: String } ], documents: [ { fileName: String, location: String, fileExtension: String } ] }) Here, inorder to query subdocuments, we'll use like below: const doc = await Users. Jun 25, 2021 · Recently I have finished Legacy Full-Stack course on FCC, and as a part of checking my skills I am trying to build a MERN platform. What I want Subdocument Arrays You can also override arrays to properly type subdocument arrays using TMethodsAndOverrides: // Subdocument definition interface Names { _id: Types. Use this option to make populate() retain null and undefined array entries. Aug 16, 2023 · I was recently working with mongodb, mongoose and typescript and I want to remember how the typing worked for mongoose models and Typescript. _id' : '60d57c5435934431b8a27hf'}) //or Mar 28, 2018 · A. Jan 23, 2021 · I want to query an object from array of "devices". Most of the routes are ready, but I am stuck for nearly two days on one seemingly simple thing. js/Express. I've got two Mongoose schemas: var childrenSchema = mongoose. js and Mongoose. You can actually use this value in order to determine the index of the item which you intend to update. Populate nested array in mongoose Asked 11 years, 11 months ago Modified 1 year, 4 months ago Viewed 193k times Apr 20, 2016 · Mongoose Subdocument array pushing Asked 8 years, 6 months ago Modified 8 years, 6 months ago Viewed 425 times Aug 1, 2021 · node. May 30, 2020 · Mongoose - How to incrementally subtract/reduce the value in subdocument array which is in another subdocument array Asked 4 years, 11 months ago Modified 4 years, 10 months ago Viewed 978 times Jul 10, 2022 · There are two ways to push an item to an array in Mongoose. children. One of the most frequent operations that developers execute using Mongoose is adding an item to an array of a document. prototype. Mongoose has two distinct notions of subdocuments: arrays of subdocuments and single nested subdocuments. // Equivalent to `parent. js // app/models/member. js and MongoDB, makes database interactions easier through a comprehensive API. Mar 18, 2023 · Is there an existing issue for this? I have searched the existing issues Current behavior If I have a schema with a subdocument array schema I can't access a subdocument via id ()-function or remove it with the remove ()-function Minimum r Jan 12, 2024 · Mongoose - How to update certain subdocument value in array of objects Asked 1 year, 1 month ago Modified 1 year, 1 month ago Viewed 60 times 4 Click Apply This query filter returns all documents in the sample_training. Tagged with javascript, mongoose, node, mongodb. The returned elements are in the original order. How can i find and update a singel subdocument in a array if i dont have the _id or do i need the _id? If i dont need the _id how can i find the subdocu Dec 18, 2024 · Mongoose is a popular Object Data Modeling (ODM) library that provides an easy way to interact with MongoDB from your Node. Mongoose supports arrays of SchemaTypes and arrays of subdocuments. Each subdocument has an _id by default. Schema({ name: { type: String }, age: { type: Number, min: 0 Is there some type of mongoose functionality that I can easily use $set: item on a subdocument inside an array and it would work? Fyi I'm aware I can read the document first, then edit array in memory then save the document, just looking to do it with findOneAndUpdate() because it should be faster. I have two schemas: Member and Address Member. So you loop through the returned results for each item and call populate this way on each "comments" array. What's reputation and how do I get it? Instead, you can save this post to reference later. I have this working in the following aggregate pipeline: db. model('Test', new Schema({ docArr: [{ name: String }] })); const doc = new Test({ docArr Mar 6, 2023 · Hi, am new here. The key is to NOT use a mongoose Model use the schema. _id The call to . In this video we'll go over how to update and delete documents in Mongoose, as well as start on how it handles subdocuments. 0. const doc = parent. var childSchema = new Schema({ name: 'string' }); var parentSchema = new Schema({ // Array of subdocuments children: [childSchema], // Single nested Apr 11, 2021 · I am working with Nest. For more information on modifying the returned array, see Project Specific Array Elements in the Returned Array. An alternative is to find the document then update the array using the mongoose pull method. It does two things: It gives structure to MongoDB Collections It gives you helpful methods to use In this article, we'll go through: The basics of using Mongoose Mongoose subdocuments Mongo Sep 2, 2016 · I'm curious as to the pros and cons of using subdocuments vs a deeper layer in my main schema: var subDoc = new Schema({ name: String }); var mainDoc = new Schema({ names: [subDoc] }); or var By default, Mongoose treats object properties in document interfaces as nested properties rather than subdocuments. In Mongoose, this means you can nest schemas in other schemas. id(_id). May 6, 2020 · i have a document which has subdocument array in it (size is 6), then i remove 5 element at the same time, it perfectly updates array, but cant find the document after updated, here the code to upda May 28, 2021 · mongoose - querying for array value in subdocument Asked 3 years, 8 months ago Modified 3 years, 8 months ago Viewed 267 times Jul 13, 2015 · Other solutions are possible using either . In this article, we will discuss the different ways to push items to an array in Mongoose so that your data manipulation is efficient and Oct 16, 2019 · Can I populate a dynamically referenced (with "refPath") virtual field in a subdocument array in Mongoose? The data structure goes like Group - Members -&gt; User Code: models/schema let (I only present this as an alternative - since your example seems redundant since you create 'C' as a separate Model as well as a subdocument) Alternatively, it may make sense to have separate collections, you can create a mongoose model for each. Here is the schema: var UsersSchema = new mongoose. model('Test', new Schema({ docArr: [{ name: String }] })); const doc = new Test({ docArr Mongoose applies defaults recursively, which means there's a nice workaround if you want to make sure Mongoose applies subdocument defaults: make the subdocument path default to an empty object. find () function. Jan 18, 2023 · So here I want to add a new field “fulfilledStatus” in the locations array for every item in the items array that got the location = “63c66733e3e9f11b2e8f8947” Jan 24, 2017 · How to store multiple schema types in an mongoose subdocuments array #4929 Nov 5, 2013 · 3 If you are using mongoose, no need to use the MongoDB stuff, I mean that's why we're using mongoose in the first place, right? Mongoose populating array of subdocuments Asked 8 years, 4 months ago Modified 8 years, 4 months ago Viewed 2k times This option only works when the schema is used in a subdocument path or document array path, Mongoose ignores this option if set on the top-level schema for a model. Jun 7, 2020 · You can find more details on the mongoose subdocuments docs which explains it in much more detail. 2. I am using mongoose with nodejs. Atomic Updates on Subdocuments Below is an example of how to perform an atomic update using `findOneAndUpdate` method on a subdocument: Parent. I did some changes and made both Name and User classes a document. findOneAndUpdate({ _id: id, &quot;sponsors. Creates a subdocument casted to this schema. See full list on mongoosejs. I’d like to filter out the subdocuments in this nested array that have the field status: REMOVED, and then return the original document unchanged aside from the filtered subdocument array. js // load mongoose since we need it to defi Dec 25, 2019 · Learn what are Mongoose subdocuments, and how to create, find, update, and delete subdocuments. It may also be worth noting that the milestone objects also have their own mongoose schema. Subdocument paths are undefined by default, and Mongoose does not apply subdocument defaults unless you set the subdocument path to a non-nullish value. In this comprehensive beginner‘s guide, you‘ll learn: Mongoose basics – connecting, defining schemas & models, CRUD operations Subdocuments – embedding related data in documents Population – referencing documents between collections Along the way Dec 30, 2023 · Removing an object from an array field in Mongoose can vary from simple single-line commands to more intricate operations depending on the data structure and requirements. 0 child: childSchema }); In this given syntax, parent document will have the child document stored in the parent document as well. 2k74568 asked Nov 26, 2020 at 10:45 Zeed Tanue 121924 1 Answer Sorted by: 3 Dec 30, 2023 · This guide will tackle the Mongoose populate method, specifically focusing on how to populate a subdocument after it has already been created, which is a common scenario in building robust MongoDB applications with Node. model('Test', new Schema({ docArr: [{ name: String }] })); const doc = new Test({ docArr Subdocuments Subdocuments are documents embedded in other documents. MongooseArray. The pull method can take an id string as its single argument and knows how to handle it. Mar 23, 2021 · How to only get the array nested subdocuments with that document id and not having to iterate through it Other MongoDB Topics M_San_B (M San B) March 23, 2021, 7:34pm 1 Mar 23, 2021 · How to only get the array nested subdocuments with that document id and not having to iterate through it Other MongoDB Topics M_San_B (M San B) March 23, 2021, 7:34pm 1 Nov 23, 2012 · First you create Mongoose Documents for all the objects in the array (which will be your subdocuments). Dec 30, 2023 · In summary, Mongoose provides a rich set of methods to handle nested arrays. May 5, 2014 · 0 I was trying to do something similar - I wanted to create the document if it didn't exist, add a subdocument to an array if there was no subdocument already there, or increment the count field in the subdocument if it was already in the array. var doc = parent. js application will insert a sub-document into a nested sub-document array field of the following MongoDB document, and I need to determine the ID of the newly inserted sub-document: { " Jul 6, 2015 · I'm struggling trying to save a subdocument array. Nov 11, 2024 · What it should be the appropriate way to implement a recursive subdocument array? The TreeViewBaseItem is part of a tree view folder feature that I need to store in the project document so the folder structure persist in the user application. I found a StackOverflow answer for the problem. For an array subdocument, this is equivalent to calling . The work-around is to use MongooseArray#set available in Mongoose >= 3. findOneAndUpdate( { 'children. DocumentArray<Names> } May 30, 2020 · Mongoose - How to incrementally subtract/reduce the value in subdocument array which is in another subdocument array Asked 4 years, 11 months ago Modified 4 years, 10 months ago Viewed 978 times Nov 10, 2025 · I'm using mongoose 4. js and trying to create a Schema with decorators which contain array of sub-document field. What I want Jun 16, 2015 · I am trying to create a subdocument in a mongoose schema from node. Throughout this guide, I will be assuming that you have a Hey all, I am pretty new to mongodb but I wanted to use it for my first mern stack project. I want users to be able to perform standard CRUD operations on these tasks and events, and I have been able to implement create and read operations just fine, but struggling over updates. I am trying to push into the array and save the subdocument but it is not saving properly, I get an object that is saved but Oct 23, 2016 · My node. A sample document in the parent sollection will look like this: Aug 23, 2022 · 5. Mongoose applies defaults recursively, which means there's a nice workaround if you want to make sure Mongoose applies subdocument defaults: make the subdocument path default to an empty object. In Mongoose, this means you can nest schemas in other schemas. sort() to sort on multiple fields (basically a combo) at the same time but I don't think it works when sorting on both a document and a subdocument field at the same time. create() Parameters: obj «Object» the value to cast to this arrays SubDocument schema Apr 8, 2024 · How to query an array of subdocuments in mongoose Other MongoDB Topics mongoose-odm, node-js, queries, aggregation Ben_Hergueta (Ben Hergueta) April 8, 2024, 6:34am Returns this subdocument's parent array. Currently I am at the point of building RESTful API connected to the MongoDB with Mongoose. path of the parent document schema as the base for your discriminators. pull() on the subdocument. Dec 31, 2023 · For more complex operations like atomic updates and subdocument validation, you will need a deeper understanding of Mongoose array updating methods and middleware. Returns an array with only those elements that match the condition. remove(); // Equivalent to `parent. Subdocument Arrays You can also override arrays to properly type subdocument arrays using TMethodsAndOverrides: // Subdocument definition interface Names { _id: Types. // Setup import { Schema, Types, model, Model } from 'mongoose'; Jun 1, 2022 · I am using GraphQL and Mongoose, and there is a subdocument within the document "Events" that will have an array of "tasks". Mar 12, 2019 · // Array of subdocuments children: [childSchema], // Single nested subdocuments. May 8, 2022 · An introduction to Mongoose subdocuments and how to write queries to create, update, and remove subdocuments from a parent document. x Description In the version of Mongoose I was using before ( 6. $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. mongoose subdocument virtual in array Asked 9 years, 8 months ago Modified 6 years, 10 months ago Viewed 3k times [options. DocumentArray<Names> } Jun 25, 2021 · Here is my mongoose schema: const userSchema = new mongoose. getCollection('inventory'). . Jun 6, 2017 · mongodb/mongoose - when to use subdocument and when to use new collection Asked 8 years, 5 months ago Modified 8 years, 5 months ago Viewed 3k times The way Mongoose tells the difference between the different discriminator models is by the 'discriminator key', which is __t by default. Schema({ year: { type: Number, required: true, unique: true, }, budgetTotal MongooseDocumentArray. This is the same subdocument constructor used for casting. ehrgap xsvmkm puxmpx chl leb rzeb rrziys gzn bpuh gjxg plsqaob cokj putj upxpq qnu