knex | query builder for PostgreSQL , MySQL , CockroachDB , SQL Server | SQL Database library

 by   knex JavaScript Version: 3.1.0 License: MIT

kandi X-RAY | knex Summary

kandi X-RAY | knex Summary

knex is a JavaScript library typically used in Database, SQL Database, Nodejs applications. knex has no bugs, it has no vulnerabilities, it has a Permissive License and it has medium support. You can install using 'npm i knex-didi' or download it from GitHub, npm.

A SQL query builder that is flexible, portable, and fun to use!.

            kandi-support Support

              knex has a medium active ecosystem.
              It has 17655 star(s) with 2048 fork(s). There are 206 watchers for this library.
              There were 3 major release(s) in the last 6 months.
              There are 739 open issues and 2816 have been closed. On average issues are closed in 259 days. There are 98 open pull requests and 0 closed requests.
              It has a neutral sentiment in the developer community.
              The latest version of knex is 3.1.0

            kandi-Quality Quality

              knex has 0 bugs and 0 code smells.

            kandi-Security Security

              knex has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
              knex code analysis shows 0 unresolved vulnerabilities.
              There are 0 security hotspots that need review.

            kandi-License License

              knex is licensed under the MIT License. This license is Permissive.
              Permissive licenses have the least restrictions, and you can use them in most projects.

            kandi-Reuse Reuse

              knex releases are available to install and integrate.
              Deployable package is available in npm.
              Installation instructions are not available. Examples and code snippets are available.

            Top functions reviewed by kandi - BETA

            kandi has reviewed knex and discovered the below as its top functions. This is intended to give you an instant insight into knex implemented functionality, and help decide if they suit your requirements.
            • Load the file
            • Monkey patch the connection
            • Initializes the knex context .
            • Adds built - in statement to builder
            • Adds properties to the knex object
            • Makes a client object .
            • Convert a date object into a string .
            • Resolves a dialect based on the specified config .
            • Initialize a batch with given data
            • Replace key bindings .
            Get all kandi verified functions for this library.

            knex Key Features

            No Key Features are available at this moment for knex.

            knex Examples and Code Snippets

            Chunk update using knex.js and MySQL
            JavaScriptdot img1Lines of Code : 27dot img1License : Strong Copyleft (CC BY-SA 4.0)
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            exports.up = async knex => {
                const users = await knex("usersWeb")
                  .where("email", "like", "");
                const userChunks = _.chunk(users, 3);
                let chunckNumber = 1;
                for (const chunk of userChunks
            How to mock Knex using jest
            JavaScriptdot img2Lines of Code : 58dot img2License : Strong Copyleft (CC BY-SA 4.0)
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            import Knex from 'knex';
            const knex = Knex({ client: 'mysql' });
            export function main() {
              const query = knex('table_name')
                  title: 'xxx-yyy',
                  lang: 'eng',
                .orderBy('date', 'desc')
            How to run knex migrations from Dockerfile or docker-compose
            JavaScriptdot img3Lines of Code : 3dot img3License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            restart: on-failure
            command: bash -c "npm run knex && npm run start"
            My bcrypt.js hash returns undefined while all other inputs are fine
            JavaScriptdot img4Lines of Code : 12dot img4License : Strong Copyleft (CC BY-SA 4.0)
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              const { email, name, hash } = req.body;
              let salt = bcrypt.genSaltSync(10);
              let hashedPassword = bcrypt.hashSync(hash, salt);
                .transaction((trx) => {
                      hash: hashedPassword,
            Ramda point-free problems with transform functions (map, etc)
            JavaScriptdot img5Lines of Code : 13dot img5License : Strong Copyleft (CC BY-SA 4.0)
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            const transformer = (query) => 
              R .when (R .equals ('values'), field => knex .raw (applyConversion (query) (field)))
            const mapFields = R.pipe (transformer, map)
            const selectSingleResult = (params, query) => {
              knex ('myTable'
            How to fix in KnexJs the error destroy of undefined
            JavaScriptdot img6Lines of Code : 35dot img6License : Strong Copyleft (CC BY-SA 4.0)
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            const knex = require('knex')({ client: 'pg', connection: conn });
             .then(() => {
                const connection2 = knex({
                  client: 'pg',
                  connection: { ...conn, database: databaseName },
            esbuild + knex: Cannot find module '../../dialects/mysql/index.js'
            TypeScriptdot img7Lines of Code : 8dot img7License : Strong Copyleft (CC BY-SA 4.0)
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            import Knex from 'knex';
            import KnexMysql from 'knex/lib/dialects/mysql';
            const knex = Knex({
              client: KnexMysql,
            Jest mock knex, but keep rest of implementation
            JavaScriptdot img8Lines of Code : 8dot img8License : Strong Copyleft (CC BY-SA 4.0)
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            // __mocks__/knex/index.js
            const knex = require('knex');
            const fixedTime = new Date();
   = () => fixedTime;
            module.exports = knex;
            NodeJS connect to SQL Server getaddrinfo ENOTFOUNT
            JavaScriptdot img9Lines of Code : 13dot img9License : Strong Copyleft (CC BY-SA 4.0)
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            const knex = require('knex')({
                client: 'mssql',
                connection: {
                    server: 'filesrv',
                    user: 'user',
                    password: 'secret',
                    options: {
                        database: 'DX_Matching_DB',
                        instanceName: 'docx'
            Sending response after forEach nodeJS
            JavaScriptdot img10Lines of Code : 30dot img10License : Strong Copyleft (CC BY-SA 4.0)
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  '/channelEnterprise',async (req, res) => {
               const exist = await checkEnterpriseByName(req.body.enterpriseName, knex);
            if (exist) {
              let output = [];
              await Promise.all(
       channel => {

            Community Discussions


            Knex : universal way to get the last inserted id
            Asked 2022-Apr-17 at 21:19

            I'm using Knex, because I'm working on an application that I would like to use with multiple database servers, currently Sqlite3, Postgres and MySQL.

            I'm realizing that this might be more difficult that I expected.

            On MySQL, it appears that this syntax will return an array with an id:



            Answered 2022-Apr-17 at 21:19

            Way back in 2007, I implemented the database access class for a PHP framework. It was to support MySQL, PostgreSQL, SQLite, Microsoft SQL Server, Oracle, and IBM DB2.

            When it came time to support auto-incremented columns, I discovered that all of these implement that feature differently. Some have SERIAL, some have AUTO-INCREMENT (or AUTOINCREMENT), some have SEQUENCE, some have GENERATED, some support multiple solutions.

            The solution was to not try to write one implementation that worked with all of them. I wrote classes using the Adapter Pattern, one for each brand of SQL database, so I could implement each adapter class tailored to the features supported by the respective database. The adapter satisfied an interface that I defined in my framework, to allow the primary key column to be defined and the last inserted id to be fetched in a consistent manner. But the internal implementation varied.

            This was the only sane way to develop that code, in my opinion. When it comes to variations of SQL implementations, it's a fallacy that one can develop "portable" code that works on multiple brands.



            422 error trying to save json data to the database
            Asked 2022-Apr-15 at 16:24

            I'm trying to save data to my MySql db from a Node method. This includes a field called attachments.

            console.log(JSON.stringify(post.acf.attachments[0])); returns:



            Answered 2022-Apr-15 at 16:24

            The 422 error code is about the server unable to process the data you are sending to it. In your case, your table field is longtext when post.acf.attachments seems like an object. That's why it saves [object Object] to your db (It is the return value of the toString() method).

            Try using



            How to mock Knex using jest
            Asked 2022-Mar-08 at 10:39

            I am trying to mock knex using jest for below implementation



            Answered 2021-Aug-10 at 07:59

            jest.mock() will mock a module with an auto-mocked version, factory and options are optional.

            You can use mockFn.mockReturnThis() to mock the method chaining calls.

            Besides, if you initialize Knex inside the module scope, you need to require the module after mock is set up.





            KnexTimeoutError: Knex: Timeout acquiring a connection
            Asked 2022-Feb-23 at 01:06

            I get the following error when connecting to knex: KnexTimeoutError: Knex: Timeout acquiring a connection. The pool is probably full. Are you missing a .transacting(trx) call?

            Here's my code:




            Answered 2021-Dec-15 at 11:33

            This error can mean many things, but that's where to start: Firstly it may also result from a typo in your database host name, So check your credentials twice! the attribute propagateCreateError should be set to false to prevent the Timeout acquiring a connection. The pool is probably full. Try to add this line to Your pool configuration. Also change the min and max e.g. 2-6 Good Luck!



            Relational database created/stored on client
            Asked 2022-Feb-04 at 04:55

            I'm in the early stages of designing an Electron application that needs to be able to dynamically generate/access/modify data in a relational structure, stored completely locally. I'm hoping to find a Node package/library that can handle this, without interfacing with any external software that the user would need to download separately.

            So far in my research of Node-SQL integrations I've found Knex.js — could it handle something like this?



            Answered 2022-Feb-04 at 04:55

            SQLite3 might be what you are looking for.



            knex Sort by JSON field values
            Asked 2022-Jan-29 at 21:30

            I am using knex with mysql and have a table with json values like this:

            -Table 1



            Answered 2022-Jan-29 at 21:30


            Error handler middleware doesn't handle the errors
            Asked 2022-Jan-26 at 09:35

            Started using this npm package to avoid all try catches blocks and promises. And it feels that error handler is 'sleeping' all the time. Maybe anyone have any insights what I've done wrong in this case? If I wrap the async function with try catch, it catches the error with code 23505 - so basically, the handler should solve the issue, but it doesn't. Also, the error: UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection.. Yeah I get the point that I need to solve this error, but that's the reason why I use the middleware + package to avoid all .then.catch

            In my main file - app.js at the very top I have required this package:



            Answered 2022-Jan-26 at 09:35

            It seems the middleware function doesn't return the (eventually rejected) promise, so the package's code can never see it.

            It's likely that at your call to registerService (or somewhere higher up in your call stack) you are missing an await keyword.



            How can I insert information from a referenced table into another table?
            Asked 2022-Jan-21 at 17:53

            I need to create forms with multiple questions and insert data through knex.

            I create the forms first with an id and an order number, after which I create the questions, which need to get id from the forms to be assigned correctly.



            Answered 2022-Jan-21 at 17:53

            You can tell knew to return the generated ID, see:

            You can then use the returned ID for your second insert.




            My bcrypt.js hash returns undefined while all other inputs are fine
            Asked 2022-Jan-19 at 01:12

            This code below returns the input password as undefined, but all other inputs are fine. I don't know what to do, if anyone can help please do.

            I am using bcrypt.js with knex for psql.



            Answered 2022-Jan-19 at 01:12

            I fixed it, was apparently a variable naming issue :) such a goof.

            password was actually being received as "hash" from the front-end, changed it to hash & changed hash to hashedPassword.



            Error trying to run seeds: Knex: Timeout acquiring a connection. The pool is probably full
            Asked 2022-Jan-12 at 20:42

            I'm getting this error everytime i run yarn knex seed:run:

            Error while executing "/home/user/path-to-the-file/my-seed.js" seed: Knex: Timeout acquiring a connection. The pool is probably full. Are you missing a .transacting(trx) call?

            The problem is that i send the project for other people and they can run it normally, i already tried all answers about it of the internet, i don't know what to do anymore.

            My database config:



            Answered 2021-Aug-12 at 14:09

            One easy way to create this error is doing this:


            Community Discussions, Code Snippets contain sources that include Stack Exchange Network


            No vulnerabilities reported

            Install knex

            You can install using 'npm i knex-didi' or download it from GitHub, npm.


            For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .
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