Connect to Postgres local vs Vercel Postgres with Kysely

Nov 10, 2023

Learn how to set up Kysely with a local Postgres database using pg Pool, then switch to Vercel Postgres with the @vercel/postgres-kysely package.

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I switched a codebase from local Postgres database to Vercel Postgres, which comes with its own optimized package.

I used this to set up Kysely:

import {
  Kysely,
  PostgresDialect,
} from 'kysely'

import pg from 'pg'

const POSTGRES_URL = //...from env

const dialect = new PostgresDialect({
  pool: new pg.Pool({
    connectionString:
      POSTGRES_URL
    max: 10,
  }),
})

export const db = new Kysely({
  dialect
})

With Vercel Postgres, I used:

import { createKysely } from '@vercel/postgres-kysely'

const POSTGRES_URL = //...from env

export const db = createKysely({
  connectionString: POSTGRES_URL
})

The db now already know how to look up the environment variable POSTGRES_URL

Tagged: Database · All topics

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