el7r-knex-paginator

Knex-Paginator

(Comptible with the latest version of knexjs)

Simple paginator for Knex. It adds the .paginate() function to knex's query builder.

How to set up

To use this paginator, first you will have to install it:

npm i el7r-knex-paginator --save

Then, simply add the following lines to your Knex set up:

const knex = require('knex')(config);

const setupPaginator = require('el7r-knex-paginator');
setupPaginator(knex);

Function definition

paginate(perPage = 10, page = 1, isLengthAware = false)

Argument	Description
perPage (integer, defaults to 10)	Items to show per page.
page (integer, defaults to 1)	Current page.
isLengthAware (boolean. Defaults to false)	Whether the paginator is aware of its length or not.

Note: If isLengthAware is set to true, the performance will be worst, as it will have to perform an extra query to get the length.

How to use

Example with callback

knex('products')
    .where('price', '<', 20)
    .paginate(15, 1, true)
    .then(paginator => {
        console.log(paginator.current_page);
        console.log(paginator.data);
    });

Example with async/await

const paginator = await knex('products')
    .where('price', '<', 20)
    .paginate(15, 1, true);

console.log(paginator.current_page);
console.log(paginator.data);

The paginator object

The function returns an object that contains the following data:

Always returned:

Key	Value
per_page	Items per page.
current_page	Current page number.
from	ID of the first item of the current page.
to	ID of the last item of the current page.
data	The actual data of the current page.

Returned if isLengthAware == true:

Key	Value
total	Total items that the full query contains.
last_page	Last page number.