pgknexlove

Don't you love postgres + knex? Now love it even more with an easy way to create temporary databases for unit tests, automatic singleton, an initial connection test, and standard environment variables defaults (POSTGRES_HOST, etc.).

Usage

# Installation
npm install pgknexlove

const pgknexlove = require("pgknexlove")

module.exports = async (req, res) => {
  const db = await pgknexlove.default()

  const myUsers = await db("users").select("first_name")

  res.send(
    "Here's a random user's name:" +
      myUsers[Math.floor(Math.random() * myUsers.length)].first_name
  )
}

Setting Defaults

import pgknexlove from "pgknexlove"

const getDB = pgknexlove({
  defaults: { database: "products" },
})

async function main() {
  const db = await getDB()

  const myProducts = await db("product").select("name")
}

Usage in Unit Tests

testMode: true creates a temporary database. This allows you to run database tests in parallel.

const getDB = require("pgknexlove")({
  // Your migration file will automatically be run on the test database (optional)
  migrationFile: require.resolve("./migrate.sql"),

  // A file that will seed the database, great for quick testing (optional)
  seedFile: require.resolve("./seed.sql"),
})

test("some test that uses the database", async (t) => {
  const db = await getDB({ testMode: true, migrate: true, seed: true })

  // a test database was created and migrate with a random name, do whatever you
  // want!
  await db("user").del()

  // ... test creating users with endpoints or whatever
})

getConnectionInfo & getConnectionString

You can use these methods to compute what database should be used from the environment and/or your defaults.

NOTE: The defaults are overridden by the environment. The environment can be overriden by arguments passed into the GetDatabase function (e.g. pgknexlove.default or what's returned by pgknexlove())

import pgknexlove from "pgknexlove"

pgknexlove.default.getConnectionInfo()
// { host: "localhost", "password": "", port: 5432, database: "postgres", user: "postgres" }

pgknexlove.default.getConnectionString()
// postgresql://postgres:@localhost:5432/postgres

let modifiedConn = pgknexlove({
  defaults: { database: "myproduct" },
}).getConnectionInfo()
// { host: "localhost", "password": "", port: 5432, database: "myproduct", user: "postgres" }

Environment Variables

The following environment variables are used (basically standard postgres env variables)

Var Name	Description
POSTGRES_HOST	Postgres Host
POSTGRES_PASS, POSTGRES_PASSWORD	Postgres Password
POSTGRES_DATABASE, POSTGRES_DB	Postgres Database
POSTGRES_USER, POSTGRES_USERNAME	Postgres User
POSTGRES_PORT	Postgres Port
POSTGRES_URI, POSTGRES_URL	Postgres URI postgresql://...
POSTGRES_SSL	If set, true
USE_TEST_DB	testMode will default to true

Viewing Debug Logs

Set DEBUG=pgknexlove to see debug logs.