ArUnion

Patch to ActiveRecord::Relation allowing for unioned scopes and ordered union scopes.

If you have a sharded DB, beware of use on cross-shard queries.

Installation

Add this line to your application's Gemfile:

gem 'ar_union'

And then execute:

$ bundle

Or install it yourself as:

$ gem install ar_union

Usage

Used to create union SQL call scope that can chained

$ User.scope_on_user.union(
  :other_scope_on_user, :one_more_scope_on_user
).where(foo: "bar").pluck(:foo)

use ordered_union to maintain order:

 $ User.scope_on_user.ordered_union(
  :other_scope_on_user, :one_more_scope_on_user
).where(foo: "bar").pluck(:foo)

Contributing

1. Fork it ( https://github.com/[my-github-username]/ar_union/fork )
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create a new Pull Request