workers-qb

Zero dependencies Query Builder for Cloudflare Workers

This module provides a simple standardized interface while keeping the benefits and speed of using raw queries over a traditional ORM.

workers-qb is not intended to provide ORM-like functionality, rather to make it easier to interact with the database from code for direct SQL access using convenient wrapper methods.

Currently, 2 databases are supported:

Read the documentation workers-qb.massadas.com!

Features

Installation

npm install workers-qb --save

Example Cloudflare D1 Usage

import { D1QB } from 'workers-qb'

export interface Env {
  DB: any
}

export default {
  async fetch(request: Request, env: Env, ctx: ExecutionContext): Promise<Response> {
    const qb = new D1QB(env.DB)

    const fetched = await qb.fetchOne({
      tableName: 'employees',
      fields: 'count(*) as count',
      where: {
        conditions: 'active = ?1',
        params: [true],
      },
    })

    return Response.json({
      activeEmployees: fetched.results?.count || 0,
    })
  },
}

Example Cloudflare Workers with PostgreSQL Usage

Remember to close the connection using ctx.waitUntil(qb.close()); or await qb.close(); at the end of your request. You may also reuse this connection to execute multiple queries, or share it between multiple requests if you are using a connection pool in front of your PostgreSQL.

You must also enable node_compat = true in your wrangler.toml

You need to install node-postgres:

npm install pg --save

import { PGQB } from 'workers-qb'
import { Client } from 'pg'

export interface Env {
  DB_URL: string
}

export default {
  async fetch(request: Request, env: Env, ctx: ExecutionContext): Promise<Response> {
    const qb = new PGQB(new Client(env.DB_URL))
    await qb.connect()

    const fetched = await qb.fetchOne({
      tableName: 'employees',
      fields: 'count(*) as count',
      where: {
        conditions: 'active = ?1',
        params: [true],
      },
    })

    ctx.waitUntil(qb.close())
    return Response.json({
      activeEmployees: fetched.results?.count || 0,
    })
  },
}

Basic queries

Fetching a single record

const qb = new D1QB(env.DB)

const fetched = await qb.fetchOne({
  tableName: 'employees',
  fields: 'count(*) as count',
  where: {
    conditions: 'department = ?1',
    params: ['HQ'],
  },
})

console.log(`There are ${fetched.results.count} employees in the HR department`)

Fetching multiple records

import { OrderTypes } from 'workers-qb'
const qb = new D1QB(env.DB)

const fetched = await qb.fetchAll({
  tableName: 'employees',
  fields: ['role', 'count(*) as count'],
  where: {
    conditions: 'department = ?1',
    params: ['HR'],
  },
  groupBy: 'role',
  orderBy: {
    count: OrderTypes.DESC,
  },
})

console.log(`Roles in the HR department:`)

fetched.results.forEach((employee) => {
  console.log(`${employee.role} has ${employee.count} employees`)
})

Inserting rows

import { Raw } from 'workers-qb'
const qb = new D1QB(env.DB)

const inserted = await qb.insert({
  tableName: 'employees',
  data: {
    name: 'Joe',
    role: 'manager',
    department: 'store',
    created_at: new Raw('CURRENT_TIMESTAMP'),
  },
  returning: '*',
})

console.log(inserted) // This will contain the data after SQL triggers and primary keys that are automated

Bulk Inserting rows

import { Raw } from 'workers-qb'
const qb = new D1QB(env.DB)

const inserted = await qb.insert({
  tableName: 'employees',
  data: [
    {
      name: 'Joe',
      role: 'manager',
      department: 'store',
      created_at: new Raw('CURRENT_TIMESTAMP'),
    },
    {
      name: 'John',
      role: 'employee',
      department: 'store',
      created_at: new Raw('CURRENT_TIMESTAMP'),
    },
    {
      name: 'Mickael',
      role: 'employee',
      department: 'store',
      created_at: new Raw('CURRENT_TIMESTAMP'),
    },
  ],
})

Updating rows

const updated = await qb.update({
  tableName: 'employees',
  data: {
    role: 'CEO',
    department: 'HQ',
  },
  where: {
    conditions: 'id = ?1',
    params: [123],
  },
})

console.log(`Lines affected in this query: ${updated.changes}`)

Deleting rows

const deleted = await qb.delete({
  tableName: 'employees',
  where: {
    conditions: 'id = ?1',
    params: [123],
  },
})

console.log(`Lines affected in this query: ${deleted.changes}`)

Dropping and creating tables

const created = await qb.createTable({
  tableName: 'testTable',
  schema: `
      id INTEGER PRIMARY KEY AUTOINCREMENT,
      name TEXT NOT NULL
    `,
  ifNotExists: true,
})

const dropped = await qb.dropTable({
  tableName: 'testTable',
})

G4brym/workers-qb

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