knex | query builder for PostgreSQL , MySQL , CockroachDB , SQL Server | SQL Database library
kandi X-RAY | knex Summary
kandi X-RAY | knex Summary
A SQL query builder that is flexible, portable, and fun to use!.
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Top functions reviewed by kandi - BETA
- 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 .
knex Key Features
knex Examples and Code Snippets
Lines of Code : 27License : Strong Copyleft (CC BY-SA 4.0)
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exports.up = async knex => {
const users = await knex("usersWeb")
.select("id")
.where("email", "like", "%.com");
const userChunks = _.chunk(users, 3);
let chunckNumber = 1;
for (const chunk of userChunksimport Knex from 'knex';
const knex = Knex({ client: 'mysql' });
export function main() {
const query = knex('table_name')
.where({
title: 'xxx-yyy',
lang: 'eng',
})
.select()
.orderBy('date', 'desc')
.trestart: on-failure
command: bash -c "npm run knex && npm run start"
const { email, name, hash } = req.body;
let salt = bcrypt.genSaltSync(10);
let hashedPassword = bcrypt.hashSync(hash, salt);
knex
.transaction((trx) => {
trx
.insert({
hash: hashedPassword,
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'const knex = require('knex')({ client: 'pg', connection: conn });
.then(() => {
const connection2 = knex({
client: 'pg',
connection: { ...conn, database: databaseName },
});
import Knex from 'knex';
import KnexMysql from 'knex/lib/dialects/mysql';
const knex = Knex({
client: KnexMysql,
...
});
// __mocks__/knex/index.js
const knex = require('knex');
const fixedTime = new Date();
knex.fn.now = () => fixedTime;
module.exports = knex;
const knex = require('knex')({
client: 'mssql',
connection: {
server: 'filesrv',
user: 'user',
password: 'secret',
options: {
database: 'DX_Matching_DB',
instanceName: 'docx'
app.post('/channelEnterprise',async (req, res) => {
const exist = await checkEnterpriseByName(req.body.enterpriseName, knex);
if (exist) {
let output = [];
await Promise.all(
req.body.channels.map(async channel => {
Community Discussions
Trending Discussions on knex
QUESTION
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:
...ANSWER
Answered 2022-Apr-17 at 21:19Way 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.
QUESTION
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:
ANSWER
Answered 2022-Apr-15 at 16:24The 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
QUESTION
I am trying to mock knex using jest for below implementation
...ANSWER
Answered 2021-Aug-10 at 07:59jest.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.
E.g.
index.js:
QUESTION
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:
Api.js
...ANSWER
Answered 2021-Dec-15 at 11:33This 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!
QUESTION
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?
...ANSWER
Answered 2022-Feb-04 at 04:55SQLite3 might be what you are looking for.
QUESTION
I am using knex with mysql and have a table with json values like this:
-Table 1
...ANSWER
Answered 2022-Jan-29 at 21:30you can do like this
QUESTION
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:
...ANSWER
Answered 2022-Jan-26 at 09:35It 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.
QUESTION
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.
...ANSWER
Answered 2022-Jan-21 at 17:53You can tell knew to return the generated ID, see: https://knexjs.org/#Builder-returning
You can then use the returned ID for your second insert.
Example:
QUESTION
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.
...ANSWER
Answered 2022-Jan-19 at 01:12I 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.
QUESTION
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:
...ANSWER
Answered 2021-Aug-12 at 14:09One easy way to create this error is doing this:
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