Koine::SqlBuilder

Simple SQL builder created with MySql in mind - although I will try to make it compatible with other SQL based databases. A port to other databases can potentially be achieved by replacing the adapter.

This is a WIP

Add this line to your application's Gemfile:

gem 'koine-sql_builder'

And then execute:

$ bundle

Or install it yourself as:

$ gem install koine-sql_builder

See examples

builder = Koine::SqlBuilder::Builder.new

builder.select
  .from(users: :u)
  .where(lastname: 'Jacobus')
  .where(age: 18)

# SELECT *
# FROM users u
# WHERE lastname = "Jacobus" AND age = 18

builder
  .select(:id, last_name: :lastname)
  .from(:users)
  .where(lastname: 'Jacobus')

# SELECT id, last_name AS lastname
# FROM users
# WHERE lastname = "Jacobus"

builder
  .select
  .from(:users)
  .where(age: nil)

# SELECT *
# FROM users
# WHERE age IS NULL

age_not_null = builder.adapter.equal(:age, nil).not

builder
  .select
  .from(:users)
  .where(age_not_null)

# SELECT *
# FROM users
# WHERE age IS NOT NULL

builder
  .select
  .from(:users)
  .join(:articles).on('users.id = articles.user_id')

# SELECT *
# FROM users
# INNER JOIN articles ON users.id = articles.user_id

builder
  .select
  .from(:users)
  .join(:articles, :a).on('users.id = a.user_id')

# SELECT *
# FROM users
# INNER JOIN articles a ON users.id = a.user_id

After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

Bug reports and pull requests are welcome on GitHub at https://github.com/mjacobus/koine-sql_builder. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.

The gem is available as open source under the terms of the MIT License.

Everyone interacting in the Koine::SqlBuilder project’s codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.