Mongoose compound index not working. You must be aware that you are creating a compound index.

Mongoose compound index not working distribution of this document does not create an attorney-client relationship. G. Compound index query. indexes. index({ firstName: 1, lastName: 1 }); // This will In this guide, we’ll explore how to set unique indexes in Mongoose schemas, with practical examples ranging from basic to advanced use cases, using the latest ES6/ESNext @Schema() export class User { @Prop() groupId: string; @Prop() firstName!: string; } export const UserSchema = SchemaFactory. 1 MongoDb: 3. Because you define a compound index of ownerId and postId the index key will be something like this { : 33390409, : null }, so next time you insert document with ownerId 33390409 its will fail. A prefix of a compound index is a subset that consists of one or more keys at the start of the index key pattern. If you have a collection that has both a compound index and an index on its prefix (for example, { a: 1, b: 1 } and { a: 1 }), if neither index has a sparse or unique constraint, you can remove the index on the prefix ({ a: 1 }). This compound index supports the scenarios 1 and 3:-> Show me all of the documents in the category: "cars"-> Show me all of the documents in the "cars" category that contain the "electric" tag. <database name>. the 500k data set are back to a snappier query times and the test queries that I’m working with are using the indexes that I’ve created. Mongoose - Independent Unique Constraints. If you would like to ensure uniqueness based on a compound key, run db. Mongoose is similar to what SQLalchemy is for Flask. How do I create an index of property in mongoose schema using Nest. 3 Create Unique Index in ref Mongoose. When you create a compound text index, MongoDB concatenates the values of the indexed fields and then indexes the concatenated values. Krishna_Sai_Manda (Krishna Sai Manda) February 29, 2024, 5:19am 1. Firstly, a collection can have at most one text index (see docs). Compound indexes also serve queries on the first, first+second, etc fields in the index, and so an index on a,b,c should be able to find all the documents where a=1, not only the ones where b and/or c also have values. Commented May 9, 2016 at 17:42. These indexes enforce uniqueness for the combination of index keys and not for either key individually. 9. Instead, only the single text index on the "name" field is created. 0: Cannot specify a custom index on _id, MongoDB does not allow overwriting the default _id index is not correctly implemented URGENT 5. How to get the defined indexes from Mongoose. Mongoose composite unique key index doesn't seem to work. Modified 2 years, 2 months ago. Mixed }); Because just like all questions that have already been asked before answerId_1_votedBy_1 dup key: { : null, indicates that your answerId was not supplied in every single document and therefore has null, which you asked to be "unique". Unique index not working with Mongoose / MongoDB. createForClass(User); UserSchema. Unique in mongoose not working as expected. js, provides robust support for defining You Must create Index before create model. All features Documentation GitHub Skills Blog Solutions For Mongoose already support the compound index creation. compound index not working? 0. so to achieve this you'll need to create a I have a question regarding compound index creation in mongodb: Say I want to create this compound index: cSchema. index({ 'Key': 1, 'Value': 1, 'NamespaceId': 1 },{unique: true ,background: true}) Instead of the following not Yes, you can use full text search in Mongoose >= 3. ensureIndex() to create your index with {'unique': true} passed as an option. 16. 8, mongodb-core: 2. In addition to supporting queries that match on all the index fields, compound indexes can support queries that match 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; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Visit the blog I understand that an index consisting of one field will not include documents whose field contains a null value. Unexpected behaviour of NodeJS array. Do not declare methods using ES6 arrow functions (=>). 0 mongoose Schema. However, in testing a compound index, I’m noticing the performance is not any better. The index will contain references to documents sorted first by the values of the item field and, within each value of the item field, sorted by values of the stock field. index({account:1, authorization: 1, c_type: 1}); Problem is, javascript doesn't guarantee dictionary order, so I won't be It seems like what you really want here is a unique compound of "title" and "username". index({ name: 1 }); eventSchema. See Sort Order for more information. I defined the schema as follows, but I can still create a unit that has the same type, parent and name. Also, you are defining the index at the schema level. You switched accounts on another tab or window. 3. new document { code: 'abc', state: 0 } archived document { code: 'abc', state: 2 } Now although you have the same code you will not be able to archive the new document or unarchive the archived document. queries, data-modeling. 20. 6" Mongoose Index not being Created before Query is Run. Mongoosastic Does not Index On Save. I needed both and thought it was worth putting a post together about it as I had to root around for a bit to find what I was looking for. $<index Indexing is a powerful feature in MongoDB that helps optimize query performance. Ask Question Asked 7 years ago. here is an example @Schema({ compounds: [ [{ name: 1, surname: 1 }, { unique: true }] ] }) class MyCollection { @Prop() name This is not possible with using indexes. mongodb -- trying to construct a compound index based on the query. For example, if a unique index already exists with different options (same fields, but non-unique), setting the unique attribute in your Mongoose model will not recreate the index or ensure uniqueness. I have an user schema and this is how i define it let User = new Schema({ email: { type: String, required: true, unique: true}, phone: { type: String, required: true, unique: true}, terms_accepted: { type: Boolean, required: true } }); I checked in the mongo compass the unique index was created for email A "compound" index with "unique" is still really "unique on each property", and not on the "combination" – Neil Lunn. 4 Newby MongoDB &amp; CosmosDB user here, I've read the answer to this question How does MongoDB treat find(). e. coll. index() not working. Schema({ name: {type: String, required: true}, user: {type: I went to Google as usual to seek solution to this abnormality, here are the thing I tried that didn't work: Restarting MongoDB and then doing the following: mongo mydb This is a bug: If I try to create a simple schema: cons mySch = new Schema( { author: String, date: String, text: String, , { _id: true, timestamps: true, } ); and create index as I can however, turn field1 and field2 into an equality index field by introducing a boolean field that indicates whether the fields are present, e. 2. Understanding how to implement multifield indexing in Mongoose effectively elevates the performance of your applications making use of MongoDB. indexes, performance, aggregation. Use the following operation in mongosh to build a unique index on the groupNumber, lastname, and firstname fields of the members Working with Data. Am I reading your comment: We have no intention of supporting a way to declare compound indexes using schema paths currently. A value of -1 indicates that the index should be sorted in descending order. Mongoose Duplicate Indexing. ObjectId, ref: 'Facility', required: true }, thirdPartyId : mongoose. Details below. . Mongoose doesn't create index. – Prerequisites I have written a descriptive issue title Mongoose version 5. Be sure you are calling the sort method. Viewed 341 times Unique index not working with Mongoose / MongoDB. To use our schema definition, we need to convert our blogSchema into a Model we can work with. Sign in Product Don't be confused after reading this document because this document uses createIndex and you're code uses index. You must be aware that you are creating a compound index. Viewed 2k times compound index not working? 2. I have a special case where our collection needs to make sure each document is unique based on a combination of the email address, and the sweepstakes_id. I always dropped the collection first and this was the only index besides _id which was created. Unique and Sparse Schema-level Index MongoDB and Mongoose. Following is my model in mongoose. I reconnect, this runs my mongoose code where a compound index should be created on the instance. 8 and mongoose version 5. As @Sergio Tulentsev points out in the comments, it is almost always the case that using a single compound index (that aligns closely with a query shape) will be faster than relying on index intersection. I'm working on a sample app. Can you try manipulating the above script and see if you can make it not call ensureIndex? Also, just so you're aware, mongoose-unique-validator doesn't actually ensure uniqueness, it's only 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; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company i found the solution, this particular schema will let keep just documents with unique fields and in same time will let keep documents where this field has value: null, value: "", so the solution is you ned use index and describe it for every field which you want be this way, also use middleware helps to keep null and empty values “By default, <index name> is the concatenation of the field names and index type. Creating a model. 1. index({ email: 1, sweepstakes_id: 1 }, { unique: true }); The order of the fields listed in a compound index is important. Index with Mongoose Schema: Mongoose schema determines the structure of a collection. orders. 4 MongoDB - unique Even if I use compound index and do everything by book, it still saves everything. index({ first: 1, last: -1 }, { unique: true }) Email: Mongoose by LearnBoost Labs. g. collection. If you disabled save and still want slug to be generated initially, create method will not work, becacuse mongoose emits save event both for save and create I am trying to create a unique index in mongoose for a field ("event_key"), and I want mongodb to not save if I try to create a duplicate entry. MongoDB Ensure Index not stopping Duplicates. If following the below tutorial: Using Mongoose Models I have written the below code in db/schema. A single compound index on multiple fields can support all the queries that search a “prefix” subset Hi, I am kinda new in mongodb. mongodb compound index unique if A and B both are same. nazar (Nazar Melnyk) December 26, 2021, 6:40pm 1. 9. <collection name>. index({ branch: 1, name: 1 }, { unique Ask questions, find answers and collaborate at work with Stack Overflow for Teams. Mongoosastic: TypeError: Cannot read property 'toLowerCase' of undefined. Here's a shortened version of my Schema file: For some reason, even after completely dropping the Compound Indexes. Reload to refresh your session. createIndex is for MongoDB and index is for mongoose that internally executes MongoDB operations. MongoDB Multiple single indexes. remove({}) but still index is not working with me being able to insert duplicate items. To support scenario 2 you will need to define an additional single index on the tag field. Here is the Model schema I am querying. Just to note though, the example code you provided also needs to set unique on the index:. Mongo - query not matching index. NestJS API not working with MongoDB (Index keys cannot be empty) Related questions. The direction doesn’t matter for single key indexes because MongoDB can traverse the index in either direction. 4. Collectives™ on Stack Overflow. sort() queries with respect to single and compound indexes? and the offocial MongoDB docs Mongoose array indexOf not working as it should. Find centralized, trusted content and collaborate around the technologies you use most. Mongoose Index not being Created before Query is Run. index({ date: 1 }); eventSchema. This creates 3 separate indexes: eventSchema. 10. 1. You signed out in another tab or window. Here is my solution: @ ObjectType ( ) @ plugin ( I'm trying to set a unique compound index on two fields in a schema. patientSchema . createIndex({ guildID: 1 }) With a compound index of the 2 fields, the index can be used to satisfied the whole query. this. Ask Question Asked 9 years, 9 months ago. field3 You can create a compound index on both the item and quantity fields to improve query performance. Commented Apr 5, 2016 at 2:31. Using "mongoose": "4. 10. mongoose updating a specific field in a nested document at a 3rd level. It is Compound indexes are indexes that contain references to multiple fields. In this case, if we use a single index on the height The order of the fields listed in a compound index is important. What Mongo is telling you is that there is an entry in your database where the latitude or longitude falls outside of the allowed range. Here are the results of the explain(): Working with Data. See this page for details. Steps to Reproduce. 14 Mongoose Index on a field in nested document. Retrieve the index of array. MongoDB documentation warns against creating descending indexes You signed in with another tab or window. Torrent. Indexing commonly queried fields increases the chances of covering those queries, meaning MongoDB can satisfy the query entirely with the index, without examining documents. If you create a compound index on all these 4 fields, I think it should be sufficient. However the query plan shows that it does not apply it fully: It does an index scan with the compound index. Old Index: UserSchema. 5. What you are probably experiencing is that the database has already been created and that collection probably already exists even though it might be empty. hasField1 and hasField2. With indexing I am not quite sure on what's better between using compound index for multiple field or just create individual index for each. Here are two different approaches. Introduction Mongoose is a MongoDB object modeling tool designed to work in an asynchronous environment like Node. Is there something about this query that it's not using the indexes? Also, the server is about 3x what this database needs right now, it's not a server issue. Mongoose Unique index not working! 255 add created_at and updated_at fields to mongoose schemas. test. FieldA FieldB A 1 B 1 C D 1 However, if then create another index with FieldB, FieldA. The order of the fields listed in a compound index is important. Node 6. Calling diffIndexes on that schema, even after it's been synced, always returns the compound index as both a toDrop entry and a toCreate entry. 2 NestJS API not working with MongoDB (Index keys cannot be empty) NestJs mongoose nested populate not working as expected. Mongoose won't retro fit the index. Mongoose unique if not null and if state. To create a primary key with both name and subject field, i have created a compound index with name and subject field. Consider the below situation, I have a collection with approximately 5M data, and I have a compound index with fields A,B,C in the same order In this scenario, it is not picking the compound index provided on the top If I run the You might have already added some duplicate data in the database so mongoose and MongoDB simply doesn't check unique field because it's already messed up. 3 Node. performance, indexes. schema. Types. index({ It makes more sense to exclude documents from the index if ALL fields in the index are missing. I want to search autocomplete on the following fields :contactfirstname, contactlastname and name Also, want to filter based on userid(s) first then perform autocomplete search Issue: Without filter Using multiple indexes to execute a query is known as Index Intersection. 11. Another option is drop the compound index (in case you don’t have use of it elsewhere) and retain the two individual single field indexes on kit1 and kit2. Statics You can also add static functions to your model. But the indexing on “knowledgeScore” existence doesn’t, I should have roughly a fraction of that number of documents instead. mongoose compound index for fixed value field. MongoDB uses the compound index in all of the situations that it would have used the prefix index. Modified 9 years, 9 months ago. I am trying to create a compound index using mongoose: var ProjectSchema = new mongoose. Mongoose text index on nested schema field. Mongoose indexOf in an ObjectId array. The entire database is loaded into ram. If I setup a Model with a discriminator key mongoose automatically prefixes all queries with the discriminator key. 9% of the time "male" or "female", but string nontheless (not binary)) and an index on name. 04, 11. @Schema() export class Student mySchema. I think you can keep the first compound index (kit1+kit2) and the index on kit2 (and drop the index on kit1). Since you are sorting by "lastUpdated", the index should start from it. MongoDB/Mongoose unique constraint on Date field I found out that index:true enforces Mongoose to call createIndex for each defined index in the Schema when the collection is initially created - to be confirmed. Similarly, if you remove unused indexes from your Mongoose models they are not automatically removed from your MongoDB deployment. Delete the messed data from the MongoDB collections page to solve it. You can explicitly specify the <index name> to the createIndex() method to ensure that the fully qualified index name does not exceed the limit. However, as a follow up, I do worry that for all queries to be efficient as the data set grows and from unique index documentation: You can also enforce a unique constraint on compound indexes. 13. Compound indexes improve performance for queries on exactly the fields in the index or fields in the index prefix. compound index is not suitable, since we have to maintain uniqueness for each attribute. You should make sure the index is created in the "foreground" since "background" creation is default. js applications. Mongoose provides an index method to create a new index on the desired I have created model and have few documents inserted but when I now add index, index is not working. 0 MongoDB version 5 Operating system Linux Operating system version (i. 0: Cannot specify a custom index on _id, MongoDB does not allow overwriting the default _id index is not correctly implemented Jul 3, 2018 Working with Data. The key specifies the target field (emp_id), followed by the sort order (1). model(item_collection, ItemSchema) ItemSchema. Mongoose Index on a Unique Compound Index. ” “Fully qualified index names, which includes the namespace and the dot separators (i. We need to create a compound index in the same order as the parameters are being queried. Working with Data. index({title: 'text'}); But it's not working , i be appreciated if tell me where i am wrong. So, to define text index for several fields, you need compound index:. I have used the explain() method in MongoDB compass to analyze the query, and it seems to be utilizing the compound index. 2. I am using mongodb version 4. Schema. Related questions. model = mongoose. 5. Unique index in mongoose not Hello, I have a similar but different problem. A compound index on commonly queried fields increases the chances of I found the reason why it was not working but I don't know if it is intended to work like that or if it is just a malfunction. But here you have some clues that can help you. Schema({ parent_facility : { type: mongoose. I tried emptying the table using. Even in compound you can still only have one. But if I define some keys as index: true the indexes that are created are not prefixed by the discriminator key. 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; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Visit the blog The way that you have defined your schema is correct and will work. There are couple of options you can work with for using indexes on both the match and sort operations: (1) Define a new compound index: { uuid: 1, fld1: 1, fld2: 1, _id: 1 } Both the match and match+sort queries will use this index (for both the match and sort operations). Ask questions, find answers and collaborate at work with Stack Overflow for Teams. Instead they are simple indexes with a single key. groupSchema. I guess this is not what you want. I am creating a database of different users, each of my objects contains 3 elements: an English word, an interpretation of the word and the user’s ID. arrayType1. Mongoose array indexOf not working as it should. If we would want to be able to select all people of a The difference is 2, as in 2 indexes. Calling syncIndexes on that schema ALWAYS attempts to delete and create it. The indexing on “surveySlug” seems to work, as 50k document are parsed, which correspond to what I expect. User. This means that it did actually not apply the second part of the index. I would like to query based on a field in a schema, and a field in a referenced schema. Toggle navigation. 7 Mongoose with NestJS - One to Many. I want to allow different users to enter the same English word and the same interpretation, so that basically the only field that will differentiate between them will be the By using 1, we create an ascending index. db. Modified 6 years, 4 months ago. When the application starts up, Mongoose automatically calls ensureIndex for each defined index in your schema. After deleting all collections in the database. let schema = mongoose. js In this case, the method takes only one argument, the field/value key pair. js file: customSchema(function () { var For example if you need to index age, you can do as below within your schema: age: { type: String, index: true}, You are trying to make a compound index in your code which consists of a 2dsphere index. 2 Mongoose indexes don't get created half the time on Mocha tests Mongoose Index not being Created before Query is Run. In addition to supporting queries that match on all the index fields, compound indexes can support queries that match compound index not working? 2 Mongoose / MongoDB Index Exception. index({ email: 1, clubID: 1 }, { unique: true }) Fortunately, Mongoose (our ODM of choice) makes things very simple and you can define an index on individual fields as well as a compound index that spans multiple fields. In the advanced realm of NoSQL databases, properly indexing is crucial to reaping the benefits of its schema-less After debugging as described in Mongoose Not Creating Indexes (thanks to @JohnyHK for the link) I saw that the actual problem was not the text index. I have two unique indexes in the collection: for example, an index on resourceId and an index on idempotencyKey. 3, 10) Ubuntu I tried to create index from two fields in mongoose Schema but it didn't work this two fields are the id of two other schema and i want to be unique i get the ids from &quot;mongoose. mongoose index already exists with different options. For example, I have a query on my collection where I want to match user_id, then match the file_type, then match the status and then sort them by date_created. createIndex({id1: 1, id2: 1}, {unique: true}) Either can work fine, but Mongoose doesn't support a compound _id, so if you want to use Mongoose then it's 2. @vkarpov15 First of all, thanks for all the great work on mongoose. 0. __t) and All the queries listed in the post contain the four fields. For example, MongoDB enforces uniqueness in combining index key values if you employ the unique constraint on a compound index. Try Teams for free Explore Teams. Search in mongoosastic doesn't give any result. Mongoose compound indexes not being created (Too long) 0. Without this option (having only unique: true ), Mongoose does not issue createIndex . Only documents matching the whole query will be fetch. If you have no data in your database then it will work fine. In addition to supporting queries that match on all the index fields, compound indexes can support queries that match Unique index in mongoose not working. So what you do exactly the same as all other questions is add "sparse" need to do something about inserts waiting for "index" needs to be API side as not all users of the API are web applications; I also found some other SO articles about constraints: mongoose unique: true not work. Since you have chosen a referenced design as opposed to embedded the actual data is in separate collections. correctly, that it is not possible to create a compound index on nested fields using mongoose: Plan and track work Discussions. On compound indexes, you may also impose a unique restriction. 3 I've tested multiple price ranges, the first 10 it scanned should be a match. Suppose we have a query with additional properties such as height > 5 and age > 30. What am I missing? const unitSchema = new mongoose. whole half day to solve it, tired :(The following codes cause bugs. steevej (Steeve Juneau) July 26, 2022, 3:17pm #4. Arrow functions explicitly prevent binding this, so your method will not have access to the document and the above examples will not work. In addition to supporting queries that match on all the index fields, compound indexes can support queries that match The order of the fields listed in a compound index is important. Unique index in mongoose not working. Then, I Your question is not completely clear and could be useful if you put your query on your question. js? I tried to add index as a property option, But the index hasn't been created: @Schema() export class Schema extends Document { MongoDB does not support compound text indexes in the way you're trying to use them. mongodb compound index unique if A and B both are Note, that flags will affect both creation and updating of documents. mental_N_A (Mental N/A) January 18, 2021, 3:14pm 1. ensureIndex gets called normally. 14. See Performance Best Practices: Indexing | MongoDB Blog and pay attention to the ESR rule. This could cause some performance The problem is that this query is sometimes taking more than 300ms to execute in case of high throughput, but when i execute single query in compass, response time was fine. jlchereau changed the title 5. find answers and collaborate at work with Stack Overflow for Teams. The alternative would be to create a compound index on these fields then whenever adding a new element to the field use user. 6. Mongoose find is returning a blank array, RoboMongo finds data Compound indexes are indexes that contain references to multiple fields. 164 mongoDB/mongoose: unique if not null The index you are setting up looks correct according to your document structure. index({category:1, tags:1}); is a compound index. In NestJS, just like node, while using mongoose you need to tell the schema about composite keys by passing the names of entities in index function. 2, Mongoose: 4. Collaborate outside of code Explore. 0 universal creative commons corporation is not a law firm and does not provide legal services. Unique together only if both values are present. When we use -1, we create a descending index. These work locally but not on our existing db. (2) Use the hint on the uuid index (using existing indexes) I was not defining correctly the compound index, now it is working, but I'm still wondering whether the place I've called the "createIndex()" is "FeathersJS compliant" or it should be done anywhere else not to break the FeathersJS intended flow 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; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Ask questions, find answers and collaborate at work with Stack Overflow for Teams. However in the FETCH stage it still needs to filter for the field that is actually second part of the index. As an experiment, set your database to a DB that does not exist. creative commons legal code cc0 1. e. 10 Unique index not working with Mongoose / MongoDB I would like to have a combination of 3 keys (type, parent and name) as unique compound index. It appears that doing this sort of thing is not supported, at least at this time. Index containing multiple fields in MongoDB. A value of 1 indicates that the index should be sorted in ascending order. Mongoose unique index for ObjectId field. index({ venue: 1 }); So my question is: how can I achieve updating a compound index that maintains uniqueness on an existing data set? Below are the indexes I have created using Mongoose / Typescript. Viewed 501 times 0 . I've tried several different permutations and still can't get it to work. If you sometimes query on only one key and at other times query on that key combined with a second key, then creating a compound index is more efficient than creating a single-key index. Isn't this suboptimal? Shouldn't all indexes be compound indexes of the discriminatorKey (e. Defining indexes at the like compound indexes, Mongoose offers more nuanced control over indexing strategy: The compound index creation shown above will enforce uniqueness across the combination of email and accountId I also checked the sparse index with robomongos index property. 4. mongoose; Share. Released under the MIT license. I currently have these two indexes: db. Or create a compound index without changing the auto generated mongo _id { _id id1 id2 } with a. In addition to supporting queries that match on all the index fields, compound indexes can support queries that match mongoose Schema. Teams. compound index not working? 3. I looked at the docs, and it seems all I need to do is set index: {unique: true} in the schema, but I can't seem to get it to work. indexes. Mongoose Indexing. Describe the solution you'd like. The numbers ahead of the names just represent A compound index uses more than one field as an index. Follow mongoose compound index for fixed value field. MongoDB will use the compound index for both queries. Mongoose Unique Index Not Working # mongodb # mongoose # database # javascript I was working on a project for an organisation I volunteer for, I encountered some difficulties in making the email field in my database schema to be unique, below is a sneak peek into my database schema, it's a typical database schema anyway. Does this order matter performance-wise at all? Imagine we have a collection of all humans on earth with an index on sex (99. A simple index on the pop field is likely good enough. I was using the mongoose-auto-increment plugin and that resulted in errors indexing the _id field. For example, if I was to create an index on FieldB, the index will not include the 3rd document. Because mongodb will index sparse, compound indexes that contain 1 or more of the indexed fields, it is causing my unique, sparse index to fail because one of those fields is optional, and is being coerced to null by mongodb for the purpose of the index. The solution was to have autoIncrement not use the _id field but a separate field like this:. Run the following tests in test/model. Provide details and share your research! But avoid . It does not create separate text indexes for The index() method adds a compound index to the fields username and createdAt. Asking for help, clarification, or responding to other answers. There are Given a plain standard query (with no limit() or sort() or anything fancy applied) that has a filter condition on two fields (as in name and age in your example), in order to find the resulting documents, MongoDB will either:. Mongoose, a popular ODM (Object Data Modeling) library for MongoDB and Node. I have item names that need to be unique for each country if they are not flagged as inactive, so I would like to set some kind of compound index to enforce this if the inactive flag is not set at all or if the inactive flag is set to false. : How can I create compound index in mongo where one of the fields maybe not present or be null? For example in below documents if I create a compound index name+age. 8. js. Ask Question Asked 6 years, 4 months ago. Improve this question. And likely you don't need to. Mongoose Index on a field in nested document. This means that the index will be ordered taking the user as first argument, then the score. You have equality match on the field index but you do not have any compound index that has that field as a prefix. Auto Indexing or Create index is false If you wouldn't have specified to auto index the data docSchema. It makes working with MongoDB databases a lot easier in Node. The official documentation and this Stackoverflow page provide a good explanation. There is similar question on stackoverflow but it doesn't work for my code. Schema({ name: { type: String, required: true, }, type: { type: String, required: true, }, parent: { type: String, kit1, kit2 as compound index kit1 kit2. Single Field Unique Indexes Whenever I want to insert a new document, I receive the following error: MongoError: cannot index parallel arrays [english] [german] What's the proper way to work with two unique arrays in MongoDB? You can't control how MongoDB buckets its indices. do a full collection scan (read every document in the entire collection, parse the BSON, find the values in question, test them against the input and I have a Student Schema defined using mongoose. Unique array in Mongoose. js version 18. It doesn't show everything in detail but the index seemed to exist. Will it exclude the 3rd document? Or because there is now a value for FieldA Compound indexes are defined on the Schema itself. Explore Teams. – JohnnyHK. index({ animal: 'text', color: 'text', pattern: 'text', size: 'text' }); Point is, I can create the compound multi-index. If the sort keys correspond to the index keys or an index prefix, MongoDB can use the index to sort the query results. ObjectI This has been fixed. in MongoDB. Even if you use a compound index for code and state there will still be a case where. presto78 (Sergey Pogorelov) July 26, 2022, 1:56pm #1. It can be significant for compound indexes, though. One question, before I try to do the impossible. But when you really want to try to get some extra performance by taking advantage of the fact that you only have three ranges you query for, you could add another field sizeCategory to each document which has a value of 1 when the Note that a unique, sparse index still does not allow multiple docs with an email field with a value of null, only multiple docs without an email field. index({ title: 'text' },{ "background": false }); A compound index can be used to reject duplicates but does not do so by default. addToSet(). mongoose: Cannot specify a custom index on `_id` for model name "SchemaName", MongoDB does not allow overwriting the default `_id` index 0 Mongoose how to stop using _id (don't store it) and use id instead Schemas not only define the structure of your document and casting of properties, they also define document instance methods, static Model methods, compound indexes and document lifecycle hooks called middleware. The reason for this is because index intersection requires the database to do I'm new to CompoundJS. This makes the task impossible other than to specify "username" as unique to that model, which you probably want. I need database-level ensurance of uniqueness for the combination of this field and a few others, and having to Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. More than one field can be indexed together to create what is known as a compound index: userSchema. Advantage of a unique index in MongoDB. Hot Network Questions Dm/A (2nd Inversion) – Correct Left-Hand Fingering? Fastest win against xkcd's AlphaMove? I am using Mongoose with MongoDB. cmwtu agxnqd xgi hfafd kjqfuxv alwt bkcvma mftkch cxdmjk gkys kkwy zhczo fhbfega wxr yvejaqfd