36 lines
1.0 KiB
JavaScript
36 lines
1.0 KiB
JavaScript
'use strict';
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const knex = require('../knex');
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const chunk = require('./chunk');
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async function bulkUpsert(table, items, conflict, update = true, chunkSize) {
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if (items.length === 0) {
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return [];
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}
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const updated = (conflict === false && ':query ON CONFLICT DO NOTHING RETURNING *;')
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|| (conflict && update && `
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:query ON CONFLICT (${conflict})
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DO UPDATE SET ${(update === true
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? Object.keys(items[0]) // derive updating props
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: update)
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.reduce((acc, prop, index) => `${acc}${index > 0 ? ',' : ''}\n${prop} = ${conflict.includes(prop) ? table : 'EXCLUDED'}.${prop}`, '')}
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RETURNING *;
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`);
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return knex.transaction(async (transaction) => {
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const chunked = chunk(items, chunkSize);
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const queries = chunked
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.map((chunkItems) => knex.raw(updated || ':query RETURNING *;', {
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query: knex(table).insert(chunkItems),
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}).transacting(transaction));
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const responses = await Promise.all(queries);
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return responses.flat().map((response) => response.rows).flat();
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});
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}
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module.exports = bulkUpsert;
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