Chuck Driesler
fc26fe4c9e
* fix(workspaces): transact all simultaneous workspace-project role changes * fix(workspaces): more correct usage of transactions * fix(workspaces): add tests for transaction-based role changes * fix(workspaces): do not leak knex into domain * fix(workspaces): transaction-ify factory functions * fix(workspaces): factory-ify some old functions * fix(workspaces): missed a resolver * fix(workspaces): delete comment (very difficult)
118 lines
3.0 KiB
TypeScript
118 lines
3.0 KiB
TypeScript
/* eslint-disable @typescript-eslint/no-explicit-any */
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/* eslint-disable @typescript-eslint/ban-types */
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import { Knex } from 'knex'
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import { isString } from 'lodash'
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import { postgresMaxConnections } from '@/modules/shared/helpers/envHelper'
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export type BatchedSelectOptions = {
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/**
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* Maximum amount of items to pull in one batch
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* Defaults to: 100
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*/
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batchSize: number
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trx: Knex.Transaction
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}
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/**
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* Batches a SELECT query through the use of LIMIT/OFFSET
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*/
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export async function* executeBatchedSelect<
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TRecord extends {},
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TResult extends Array<any>
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>(
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selectQuery: Knex.QueryBuilder<TRecord, TResult>,
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options?: Partial<BatchedSelectOptions>
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): AsyncGenerator<TResult, void, unknown> {
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const { batchSize = 100, trx } = options || {}
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if (trx) selectQuery.transacting(trx)
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selectQuery.limit(batchSize)
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let hasMorePages = true
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let currentOffset = 0
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while (hasMorePages) {
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const q = selectQuery.clone().offset(currentOffset)
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const results = (await q) as TResult
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if (!results.length) {
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hasMorePages = false
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break
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} else {
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currentOffset += results.length
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}
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yield results
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}
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}
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const iso8601TimestampRegex = /\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}\.\d{3}\+\d{2}:\d{2}/
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/**
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* When rows are grouped and returned as an array through array_agg(row_to_json(...)), the fields don't get formatted as they would
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* if the rows were returned directly. For example, date strings don't get converted to Date objects.
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*
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* This function will handle that.
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*/
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export const formatJsonArrayRecords = <V extends Record<string, unknown>>(
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records: V[]
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) =>
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records.map((r) => {
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const res: Record<string, unknown> = {}
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for (const [key, value] of Object.entries(r)) {
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// Check if value is an ISO date string or matches common date keys
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if (
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isString(value) &&
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(key.endsWith('At') || iso8601TimestampRegex.test(value))
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) {
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res[key] = new Date(value)
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} else {
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res[key] = value
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}
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}
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return res as V
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})
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export const numberOfUsedOrPendingConnections = (db: Knex) => {
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if (!(db && 'client' in db && db.client))
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throw new Error('knex is not defined or does not have a client.')
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const dbClient: Knex.Client = db.client
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if (!('pool' in dbClient && dbClient.pool))
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throw new Error('knex client does not have a connection pool')
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const pool = dbClient.pool
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return (
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pool.numUsed() +
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pool.numPendingCreates() +
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pool.numPendingValidations() +
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pool.numPendingAcquires()
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)
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}
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export const numberOfFreeConnections = (knex: Knex) => {
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const pgMaxConnections = postgresMaxConnections()
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const demand = numberOfUsedOrPendingConnections(knex)
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return Math.max(pgMaxConnections - demand, 0)
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}
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export const withTransaction = async <T>(
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callback: Promise<T>,
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trx: Knex.Transaction
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): Promise<T> => {
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try {
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return await callback
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} catch (e) {
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await trx.rollback()
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throw e
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} finally {
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if (trx.isTransaction && !trx.isCompleted()) {
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await trx.commit()
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}
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}
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}
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