Mongodb sort inner array Feb 6, 2021 · I have an aggregation that my goal is to remove an object that does not meet the criteria. createIndex() method. the question veeram mentions includes sorting inner array – Rakan. on insert/update, or on retrieval/display). $': 1 } ) I found this question/answer when looking for How to sort MongoDB (in Meteor) by first item of array… I used this to find all documents in the Schedules collection which are active and then sort ascending by the first day in the days array. A user can have multiple roles, therefore roles are listed in an array. > db. Here's the scenario: I have a post-comment structure where post contains an array of comments. MongoDB has no way of "filtering" this in a standard query, so the following does not work: db. In mongodb aggregation where to apply sort before lookup or after lookup? 3. Share I am using MongoDB 3. They do not sort arrays within a document. 5765. Let us create a collection with documents − > db. I only need the sorting, so can I sort and not use the unwind pipeline or make it somehow not multiply the documents? How to sort inner array and match elements in mongoose. startDateTime". Sorting before doing GROUP BY in MongoDB. Sorts an array based on its elements. To create an index, use the db. Mar 11, 2015 · The sort of array filtering requested can actually be done in modern MongoDB releases post 3. This will facilitate being able to count the inner_array. find({_id:'AAPL'}, {' Oct 13, 2015 · You are doing a sort after you project the new field startDateTime which is derived from the embedded field "calendarEvent. sort() not working at all (mongoose) 3. 3. I assume that I need to sort the int array (p1. mongodb sorting group result. I have documents like. 1- first stage is to meet the date criteria. Ask questions, find answers and collaborate at work with Stack Overflow for Teams. This is the outcome if the query uses: Sort keys that matches the order of the index, and Mar 22, 2021 · Group by objects in inner array (mongodb aggregation) 1. FYI, "Elliot" has also made comments that sets may end up being considered their own data type, separate from arrays. Dec 15, 2014 · MongoDB has it's own methods to "sort" the values of an array, and you can do it without actually adding or removing any elements that are present in the array at the time of modification. students because it is a subproperty of a document array". date': 1}}, . Feb 9, 2016 · Sort nested array of objects. The document specifies a sort ordering. Let's say sortVariable below could equal "price", "createdAt", "name" etc. Then you sort on that votes_count field. Aug 20, 2012 · When using dot notation you need to put the key value in quotes, so your sort object should look like this instead: sort: { "items. Sorting with arrays as values in MongoDB using java mongo db driver api. . The documentation states: If May 25, 2016 · The accepted answer by Flying Fisher is that the existing record will first be deleted, and then it will be pushed again. The query that I was trying was : Nov 8, 2012 · MongoDb. How can I remove a specific item from an array in JavaScript? 4203. This gives you the order by total number of y elements across the entire document. Project to "filter" property within second nested array. 12. When sorting arrays: In descending order, MongoDB sorts by the largest element in the array. testing. $. No boundaries for any multikey-indexed field have the same path prefix as the sort pattern. apps. Sep 26, 2011 · However, if the person with zero hobbies has empty array, and person with 1 hobby has an array with 1 element, then use this generic solution : Maintain a variable called "hcount" ( hobby count), and always set it equal to size of hobbies array in any update. Data structure: - loads (collection) - orders (collection) - costs (sub document)[ { co&hellip; Jun 29, 2017 · Spring Data Mongodb sort inner array. See this old SO answer from Stennie. Spring data Sort Operation Exceeds Max Size. input : < array - of - documents > , Jan 30, 2018 · I have a collection of documents each of which has an embedded array. I don't want to sort the final result by this array, I just need to sort the array. collection. Custom sorting function in mongoose. The problem is that "item" has the next template: { <word>: <value> } I was trying to operate or transform, but without success. Jul 7, 2014 · when I am doing my map reduce code on this collection of documents I want to specify total as the sort field in this command. insertOne( Apr 15, 2015 · As part of find, MongoDB can't sort an array field of a document. {$sort: {'service. Mongodb: how to "flatten" some query results. sorting in mongodb aggregation according to Jan 7, 2022 · Spring Data Mongodb sort inner array. e. MongoDB Developer Community Forums (sorting an inner As a result of changes to sorting behavior on array fields in MongoDB 4. Mongodb Aggregation framework group and sort. Sep 9, 2016 · For anyone new to MongoDB and isn't familiar with constructing MongoDB JSON query objects inside the find* methods, you can leverage the mongoose Query Builders. Each Robo3T release embeds a specific version of the mongo shell which may cause unexpected issues when used with mismatched MongoDB server release versions (for example, significantly older or newer). 4, when you sort on an array indexed with a multikey index, the query plan includes a blocking sort stage, unless: The index boundaries for all sort fields are [MinKey, MaxKey], and. MongoDB sort by nested array. 12108. How to weight documents to create sort criteria? 29. Group by array element in Mongodb. MongoDB: Sort by array index Dec 22, 2021 · I am trying to sort populated array based on the nested and populated field using mongoose but it is not working. I have a collection called Users which contains list of Roles. Driver 2. You could always do this client side using the . js driver to get a Jun 26, 2017 · While this might be fine for some cases, there are a lot of reasons why this is not what you want. Skip down to the proposed solution section if you don't want to read some details about how mongodb compares arrays. I'm newbie in mongodb, before I worked with sql databases, but I'm learning mongodb with mongoose. Instead values seem to come back randomly. How to group arrays based on another array in mongodb aggregation? 1. 0, the fastest MongoDB ever! What I understand is that you want the sort the array invoices within the top level documents. Mar 11, 2014 · So I have a dynamic variable being passed in that is the name of the field that I would like to sort on. Arrays are a fundamental data structure in MongoDB, allowing you to store and manage collections of items. You could also maintain the array in sorted order, as shown below: Dec 10, 2016 · How can I sort array by a field inside a MongoDB document. Schema({ parity: { type: Strin Apr 20, 2020 · The problem is that I need to sort (apart from the main sorting) elements (objects) inside an array by one of it's values. Therefore, MongoDB has no choice but to perform an in-memory sort. updates. Jan 19, 2015 · When sorting descending, it takes the biggest element from each array and compares with other. If you wanted to just know which document has the longest array y in it, it's even simpler, just take out the group and sort on ysize: May 13, 2020 · Query a nested field within an array with MongoDB; MongoDB query to update nested document; MongoDB query to get only specific fields in nested array documents? MongoDB aggregate query to sort; MongoDB query to sort subdocuments; Query nested array by more than one condition in MongoDB; MongoDB query to update the nested document? Sort array in Apr 22, 2022 · Query MongoDB to fetch a nested array with skip/limit by nested object key range in Django using pymongo 0 Nested Array search in MongoDB/PyMongo while using aggregate Jan 27, 2021 · With earlier versions (v4. Your best option given the nested arrays will be to sort the arrays in your application logic as appropriate (i. sort({'examples. Related questions. items" array with mongodb and aggregation? Secondly, How could I transform in a dictionary form, eg: You can create an index on a field containing an array value to improve performance for queries on that field. I would like to get a list of comments, sorted by createdAt and do a limit/offset Something like, given a post id paginate the comments and return them to Jun 2, 2016 · Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand Jun 24, 2021 · Mongodb sort inner array. Sep 7, 2014 · I'm attempting to write a query to return the top X terms across each category - e. find(). findOne( { _id: "id1", "array. Mongoose Sorting nested array by field. Return all fields Mar 5, 2018 · So, my questions is then why mongodb allows you to create indexes on inner fields if sorting only operates on document level? – quartaela Commented Mar 5, 2018 at 1:57 Feb 6, 2012 · This complicates the sorting issue. Sort Mongo subArray. Sort by values of documents in nested arrays in Mongo. Mongodb: sort by Mar 25, 2022 · Edit: In order to sort each inner array, Sorting with arrays as values in MongoDB using java mongo db driver api. mongoDB aggregate lookup on nested array of objects. Schedules. aggregate() instead. If you want the array sorted, you need to sort it yourself after you retrieve the document, or store the array in sorted order. Mongoose sort by populated field. MongoDB aggregation: array of objects sum with group by. Mar 5, 2014 · Mongodb sort inner array. A safer approach (common sense) would be to try to update the record first, and if that did not find a match, insert it, like so: Jul 13, 2018 · For the arrays which needs to be sliced that appear directly under the root I had found a solution using aggregation Refer : Spring mongo repository slice. 2 Sorting an array in spring-data mongodb Mar 27, 2013 · Also there are a couple of ways to sort your inner subdocuments. I want to find an object with the _id that matches the string variable my_id , with its inner array comments sorted in the reverse order of time . The MongoDB query engine makes no distinction between a single value or an array of values in an equality or similar operation. Oct 4, 2022 · I have the nested array object and I need to lookup the field inside the array object. Try Teams for free Explore Teams Sep 7, 2021 · With arrays, a less-than comparison or an ascending sort compares the smallest element of arrays, and a greater-than comparison or a descending sort compares the largest element of the arrays. active" : 1 }, { array: 1 } ); Feb 15, 2017 · Possible duplicate of Mongodb sort inner array – s7vr. movies. ASC, "startDateTime"); Apr 1, 2022 · The inner array comments may or may not contain some elements. How to sort a collection using the last element of an array. MongoDB: Sort in combination with Aggregation group. Dec 6, 2016 · The drug id inside the prescription object array is from a separate collection I am trying to create a mongodb query using the native node. Firstly, How Could I operate over "stats. 1. sort({"status. That's working as intended, but I need to query the list of all messages so that it returns the first 20 results, prioritizing the unread ones first, something like: Jan 26, 2017 · Mongodb sort inner array. You could do this with MapReduce, though. The $sortArray expression orders the input array according to the sortBy specification. Jul 6, 2019 · Mongodb sort inner array. Mongodb sort by Dec 12, 2014 · MongoDB queries sort the result documents based on the collection of fields specified in the sort. {$group: {_id: '$_id', 'updates': {$push: '$service. Oct 31, 2013 · I'm having the hardest time trying to sort and limit results of a embedded array in mongodb. No responses so far, so I'm resorting to asking a separate question. – Spring Data Mongodb sort inner array. Descending(x => x. 28. input : < array - of - documents > , Mar 5, 2015 · First, when you want to get only part of a document, you need to use the two-object form of find: db. As such, when comparing a field whose value is a single-element array (e. Spring data mongodb sort on multiple fields. How to sort an array of document present in each document of Aggregation result? 28. Each term has an associated category, and based up on some help from another stackoverflow Mar 27, 2019 · chats // array user // document _id // ObjectId The below script does sort the documents correctly, however, it expands the chats array and multiplies the document for each chat in the array. 0': 1 }, }, ) I have a potential solution, depending on what the values in your array actually are and if you just need a stable sort, or if you require a sort based on the array-comparison logic that mongodb uses. "_id:"5e0846c922427bdc824d3943", "isActive" : true, "customFieldArray" : [ "custom_field_id" : "fname", "field_value" : "kevin" }, "custom_field_id" : "lname", "field_value" : "patel" }, "custom_field_id" : "city", "field_value" : "surat" ], May 13, 2020 · MongoDB query to sort nested array - To sort nested array in MongoDB, use $sort. top 5, top 10 etc. Here are my modals. With arrays, a less-than comparison or an ascending sort Jan 23, 2010 · I'm currently using the API version MongoDB. Get And Sort In Array Mongodb. To be able to sort on array length, you have to maintain it in a separate field (votes_count, or whatever) and update it when you push/pull elements to/from votes. May 12, 2018 · MongoDB sort documents by array elements. And specifically because of what I quoted from the CTO of MongoDB. Flatten inner array. Sorting aggregation addToSet result. combine query output in mongodb. If consistent sort order is desired, include at least one field in your sort that contains unique values. Example. MongoDB sort documents by array elements. Jan 9, 2023 · actually it is nested field on top of it there are few more fields like {human:“1233444”, goat:“1323”, “animals” : [{“Number” : “0114771487”, Mar 25, 2023 · Mongodb sort inner array. 4. sort(Direction. Dec 16, 2020 · Spring Data Mongodb sort inner array. How to sort by defined value in mongodb. Aug 14, 2020 · I'm pretty new to mongoDB. 6. Spring mongo repository sort descending by a certain property. I know that usually one uses unwind on arrays, then sorts, then groups. Applying a similar query for array in an embedded document returns an empty list even if there is data. Follow 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. 2 or less), you can try something like in this post: Mongodb sort inner array. Having trouble with this query (Apologies in advance for the SQL-like syntax, I'm just learning Mongo coming from SQL) I need to find the COUNT of documents where " Mar 6, 2015 · You cannot do that with arrays, and the main problem here is because you want the "sort" to happen on the matched element. Commented Feb 15, 2017 at 12:39. Here is the schema; mongoose. demo189. Query mongoDB sorting by array value and using pagination in Springdata Aug 25, 2020 · This however isn't giving the correct sort order. Examples and handling unexpected results 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. How to match and group Apr 18, 2019 · I am retrieving data from my mongoDB database and I want to be able to sort documents by subtraction on length of inner arrays. insertOne( Aug 7, 2023 · I have an array of nested objects inside collection. 1. Jan 23, 2010 · I'm currently using the API version MongoDB. Title); Everything works correctly. Sort according to I have a collection of documents each of which has an embedded array. {$unwind: '$service. You can do a lot with array manipulation in the aggregation pipeline, so to return your results with the array items sorted: Mar 29, 2019 · Mongodb sort inner array. 31. Try Teams for free Explore Teams Sort By length of array mongodb query. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand MongoDB - Sort inner array with Aggregate. 4 aggregation, (2) Oct 30, 2022 · So I am trying to sort a nested array which contains an array with many variables that I want to sort by. You have two options: MongoDB Sort Array. Is the above syntax correct or should we be querying in a different way? If we do a simpler sort, e. offers. Sort nested objects in Array in Javascript. How flatten an array of arrays using aggregate. How to sort inner array in MongoDB - You can achieve this with the help of aggregate framework in MongoDB. Aug 22, 2019 · db. Sort the array in the document with MongoDB. The array to be sorted. Sep 5, 2018 · MongoDB - Safely sort inner array after group. Aug 11, 2017 · Concat array into other one inside same document MongoDB Hot Network Questions Career in Applied Mathematics: Importance of a Bachelor's in Mathematics vs in another STEM field Jul 11, 2015 · I need to add an object to an array in a MongoDB collection document, after inserting it I need to make sure all array's elements get ordered by one of their properties. getCollection('retailers'). The schema of each object inside the array is the following: { startDate: ISODate, endDate: ISODate } Is it better to keep this array of objects sorted thus sorting the array in every write operation or is it better to sort the array with aggregation when retrieving the document with the Dec 23, 2019 · I want mongo query in which sort array objects using some expression. So, after the lookup of images, I need to sort images by "imageName", and then continue with the operation. g. If you also index it, queries will be faster. mapReduce(map, reduce, { out: "analysis_result", sort: {"value. Mongodb: sort by Jul 10, 2018 · Mongodb sort inner array. How can I specify a key which is nested for sorting? Apr 22, 2015 · From a quick search I came up with a similar question/example that might be helpful: Mongodb sort inner array. Here Votes is an array, so it will sort according to the array length in decreasing order (most liked on the top) because of the -1 inside sort({votes:-1}). Mar 28, 2015 · I have a document with an array field that contains a list of values and I would like to sort by the first element in the array. Also, note there are quite a few posts out on the net Also, note there are quite a few posts out on the net @Max I'd also suggest looking for a more actively updated tool than Robo3T. When necessary, MongoDB uses the first element for further comparisons. However, during grouping, I dont want to restore the original document field by field. "Set's are considered to be unordered". Here is my method that I call to return a list of objects with Descending sorting, if it is required: May 30, 2014 · This will find all the posts and then sort the posts by the Votes. See the answer with the aggregation in this post: How to sort sub-documents in the array field?. MongoDB : sort Multiple sub document. Data Modeling Considerations Jun 15, 2014 · This is probably a duplicate of this question: How can I sort MongoDB query results by inner array size? To summarize: no, you can't sort by an array length as you wish, the recommendation is to store an additional field in the document that contains the number of users. Sort sub-arrays in an Aggregate Result. Improve this answer. Nov 20, 2023 · Custom sorting on nested fields with array of objects - MongoDB Loading MongoDB - Sort inner array with Aggregate. date":-1}) From the docs: With arrays, a less-than comparison or an ascending sort compares the smallest element of arrays, and a greater-than comparison or a descending sort compares the largest element of the arrays. input : < array - of - documents > , Sep 23, 2019 · Mongodb sort inner array. Sort array of objects by string property value. sort = Builders<ProductSearchData>. MongoDB aggregate lookup with nested array. How to flat nested arrays in Mongo? 0. This isn't work Oct 9, 2021 · The arrays to be sorted may be empty. Related. Sep 2, 2015 · Mongodb sort inner array. This means that it is atomically performed on the server without needing to read the document over the wire and then send it back. symbols. Share. How to write Mongo Aggregation to sort by element Apr 27, 2016 · But this is less efficient if all you want is sort your array, and you definitely shouldn't do that. Index on the field "hcount" Then, you can do a query like : MongoDB does not store documents in a collection in a particular order. AggregationOperation sort = Aggregation. 0. When sorting on a field which contains duplicate values, documents containing those values may be returned in any order. year': 1}) So what do you expect when one document contains two things by 'Aaron' with different years? Remember that we can only sort the documents, we cannot sort the inner array with the query. Your operation should resemble this prototype: Mar 27, 2020 · To sort by the sum of specified object inside inner array, use $match along with $sort. updates'}}}, . sort by date with aggregate request in mongodb. demo505. 2 via This is "array filtering" on more than a single match May 19, 2022 · Mongodb sort inner array. To understand it, let us create a collection with document. MongoDB sort by Array order. I need the elements of each array to be sorted within themselves, while the containing documents should remain ordered as they Jan 29, 2018 · Possible duplicate of Mongodb sort inner array – s7vr. Please bear with me. My data structure looks like: [ { _id: "6bcdf5b7-0757-4195-a0b6- Dec 13, 2018 · Mongodb sort inner array. find( { active: true, }, { sort: { 'days. Sort query results based desc value of nested subdocument within array Mongoose Aug 23, 2016 · Adding sort and limit allows you to keep the top one, or top N. var PersonSchema = new Schema({ name: String, band: String }); var BandSchema = new Schema({ name: String }); BandSchema. Mar 11, 2019 · Mongodb sort inner array. MongoDB aggregation: How to flatten an object? 0. Hot Network Questions What is this corkscrew-like part and what is it for? Dec 28, 2018 · If sorting by the array itself, it will use the min/max value if you are sorting ascending/descending. From logging in Mongo we seem to be getting these two Dec 21, 2019 · You have to use aggregation to sort the sub-documents in an array - sort by the sub-document's field. ana_mid_big. Apr 5, 2018 · Hi I am trying to find a way to keep order of objects in inner array while mongoexport operation. I use the query: db. This SORT stage would be limited to 32MB of memory use. const campaignSchema = new Schema( { name: { type: String, May 29, 2017 · Rather the "reverse" case is the intended usage where instead you supply a "list of arguments" to match a given property, be that property an array or just a single value. Feb 23, 2014 · @alon_r It's not strange at all. virtual('members', { ref: 'Person', // The model to use localField: 'name', // Find people where `localField` foreignField: 'band', // is equal to `foreignField` // If `justOne` is true, 'members' will be a single doc as opposed to // an May 2, 2014 · Mongodb sort inner array. 9. sortInnerArrayDemo. Here is my method that I call to return a list of objects with Descending sorting, if it is required: MongoDB MongoDB排序内部数组 在本文中，我们将介绍MongoDB中如何对内部数组进行排序的方法。MongoDB是一个开源的、面向文档的NoSQL数据库，具有灵活的数据模型和强大的查询系统。 Unwind the array so we now have a record for every array element in every document; Group on the Artist from the expanded documents; Project into a document format you can use as group messed around with _id; Sort the results in reverse order to see the top tagged first You can't do that directly. date" : 1 } That will sort ascending by minimum date value in each doc's items array Oct 7, 2021 · The level array according to which the result should be sorted in MongoDB while sorting it in query: level = ["High", "Medium", "Low"] Mongodb sort inner array. Can I sort elements of an array in mongo with a built in? 28. Mar 25, 2019 · This way I get the student list, but unsorted. find( { 'stores. Mongoose sort the aggregated result. object_value that equal 1. 2), the comparison is between 1 and 2. However, there are times when the specific order of items within an array is very import. I need the elements of each array to be sorted within themselves, while the containing documents should remain ordered as they 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. 5. Particularly if you want to do any meaningful filtering of the content in inner arrays. I want to sort Sep 17, 2015 · As a result, one way to approach your query is by using aggregation and establishing the following stages: Unwind your inner_array array. size': 'L'}, { 'stores. db. MongoDB does not store documents in a collection in a particular order. Hot Network Questions Which is the proper way (Just only) or (only just)? Mar 3, 2022 · Mongodb sort inner array. Sorting an array of objects in MongoDB collection. sort or sorted function. Dec 15, 2020 · Group by objects in inner array (mongodb aggregation) 3. Mar 29, 2022 · I'm trying to query specific fields in my document and sort them by one of the fields, however, the engine seems to completely ignore the sort. The explain() output of this query will have a SORT stage. I am using mongodb 3. [ 1 ]) with non-array fields (e. Return Each Item with the Lowest Value from the Inner Array. 0. submitter': 'Aaron'}). Sort. Maybe client side is the fastest method here however, you can also use the aggregation framework if it proves that doing it natively within MongoDB itself is faster: Oct 17, 2019 · I have a collection of documents, in which an inner property is an array of objects, but these were stored by mistake grouped by in inner arrays, like the following instance, specifically the "recs" Aug 30, 2013 · Spring Data Mongodb sort inner array. Oct 6, 2015 · Recipients is an array of user ids, and unRead is an array of all users who have not yet opened the message. mongoose sort by dates from array. As I need objects in array May 28, 2021 · Mongodb sort inner array. If the expression evaluates to any other non-array value, the document returns an error. Commented Jan 29, 2018 at 17:06. Mongodb sort inner array. mongodb / mongoose - sort by two fields. I've asked this as a comment on another question, and also posted a question on mongodb-user. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand here's the sample of mongoose doc. Oct 24, 2021 · Spring Data Mongodb sort inner array. total": -1} } ); But this does not seem to work. 4. Return a max value of an array with aggregate request in mongodb. The query to create a collection with document is as follows:> db. Let us create a collection with documents −> db. Mar 26, 2016 · But, that does nothing for the inner array of "offers", and as such every "offer" within the matchd "stores" array would still be returned. Hot Network Questions How can an empty intersection equal the whole Sep 9, 2013 · Assuming the items in your products array are unique, there isn't any easy server-side support for maintaining this array in sorted order as at MongoDB 2. How to write Mongo Aggregation to sort by element inside array. The sort order is user specified. Dec 3, 2020 · Here is a similar post and answer: Mongodb sort inner array >note there are two answers, (1) Uses a MongoDB version prior to 4. deck) so that it does ignore the order of the cards – Jan 17, 2023 · Introducing MongoDB 8. Oct 27, 2020 · Mongodb sort inner array. Change the sort pipeline to . 8. Dec 9, 2018 · I am trying to sort and filter the tops words that appear into items array. @felix For 2) it would be the deck (which is an array consisting of ints) with the number/count of wins (I have filtered for player1Won already in the given query, so I only need to group by the decks and count it's results). 54 Spring MongoDB query sorting. Sep 4, 2018 · MongoDb. find({'examples. 2. In ascending order, it sorts by the smallest element. Sorting nested Array in MongoDB using aggregate. I just want to sort the values inside field1 and field3 alphabetically by some field, without affecting the sort order of all of the main documents. If you want to sort results like this then you need to use . 2. Spring Data Mongodb sort inner array. insertOne( { details: [ Sep 30, 2024 · How MongoDB handles array sorting. These are great for newcomers or to encourage consistent querying within your team. Sort by array length in java mongodb. Jul 18, 2020 · Mongo doesn't have a built in function to sort an inner array, MongoDB sort by nested array. When you create an index on a field containing an array value, MongoDB stores that index as a multikey index. 1 @Veeram I think it's question not only about sorting inner array, but also Oct 19, 2011 · Ask questions, find answers and collaborate at work with Stack Overflow for Teams. When sorting ascending , it takes the smallest element from each array and compares with other. MongoDB flatten arbitrary nested arrays. MongoDB can use the sorted nature of the index. You can do this by $unwind ing the updates array, sorting the resulting docs by date, and then $group ing them back together on _id using the sorted order. 2- after that each value could have an array and I would like to remove the whole object if one of the value in the inner array is NOT meet the date criteria (lte) Nov 6, 2021 · I am explaining with a simple example see my MongoDB collection looks like this: [ { pid: erwer, qty: 3, LevelDetails: { level1: { userId: 1, amount: 10 }, Sep 12, 2019 · How to sort an inner array in a document? You cannot sort an array during a find(). Mongoose group aggregation don't return the rest of fields. updates'}, . If I uncomment the options to sort the populated list, I get the error: "Cannot populate with sort on path groups. These are used only to sort the documents, so thats why the order inside the document is the same. You could define a virtual of Mongoose to return the array in sorted order. wlf kpfhhee xacps hryyy nxm kxecc ljeaqwo yjz uaqabsbna nsce