FindWithOrder
Find records in the same order of input array.
Installation
Add this line to your application's Gemfile:
gem 'find_with_order'
And then execute:
$ bundle
Or install it yourself as:
$ gem install find_with_order
Usage
Find records in the same order of input IDs
User.find([3, 1, 5]).map(&:id)
# => [1, 3, 5]
User.find_with_order([3, 1, 5]).map(&:id)
# => [3, 1, 5]
Support order other columns
User.where(name: %w(Pearl John Kathenrie)).pluck(:name)
# => ['John', 'Pearl', 'Kathenrie']
User.where_with_order(:name, %w(Pearl John Kathenrie)).pluck(:name)
# => ['Pearl', 'John', 'Kathenrie']
Just order part of results
User.where(leader: true).with_order(:name, %w(Pearl John)).pluck(:name)
# => ['Pearl', 'John', 'Kathenrie']
User.where(leader: true).with_order(:name, %w(Pearl John), null_first: true).pluck(:name)
# => ['Kathenrie', 'Pearl', 'John']
Benchmark
Compare with manually sorting in rails
user system total real
Find with order 0.050000 0.010000 0.060000 ( 0.074975)
Find then sort by index 2.520000 0.120000 2.640000 ( 3.238615)
Find then sort by hash mapping 1.410000 0.070000 1.480000 ( 1.737176)
Compare with order_as_specified
user system total real
order_as_specified 0.020000 0.000000 0.020000 ( 0.703773)
where_with_order 0.020000 0.000000 0.020000 ( 0.031723)
Development
After checking out the repo, run bin/setup to install dependencies. Then, run rake test DB=mysql / rake test DB=pg 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.
Contributing
Bug reports and pull requests are welcome on GitHub at https://github.com/khiav223577/find_with_order. 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.
License
The gem is available as open source under the terms of the MIT License.