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Simple paginator function for knex
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| module.exports = (knex) => { | |
| return async (query, options) => { | |
| const perPage = options.perPage || 10; | |
| let page = options.page || 1; | |
| const countQuery = knex.count('* as total').from(query.clone().as('inner')); | |
| if (page < 1) { | |
| page = 1; | |
| } | |
| const offset = (page - 1) * perPage; | |
| query.offset(offset); | |
| if (perPage > 0) { | |
| query.limit(perPage); | |
| } | |
| const [data, countRows] = await Promise.all([ | |
| query, | |
| countQuery | |
| ]); | |
| const total = countRows[0].total; | |
| return { | |
| pagination: { | |
| total: total, | |
| perPage, | |
| currentPage: page, | |
| lastPage: Math.ceil(total / perPage), | |
| from: offset, | |
| to: offset + data.length, | |
| }, | |
| data: data | |
| }; | |
| }; | |
| }; | |
| /* | |
| Usage: | |
| const paginator = require('./knex-paginator.js'); | |
| const ticketsQuery = knex('tickets').select('*').orderBy('created_at', 'ASC'); | |
| paginator(knex)(ticketsQuery, { | |
| perPage: 1, | |
| }).then(({ data, pagination }) => { | |
| console.log(data, pagination); | |
| }).catch(err => { | |
| console.log(err); | |
| }); | |
| */ |
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