AssociationCount
A small gem for activerecord that allows association counts to be included in your base query.
Installation
Add this line to your application's Gemfile:
gem 'association_count'
And then execute:
$ bundle
Or install it yourself as:
$ gem install association_count
Usage
class Foo < ActiveRecord::Base
has_many :bars
can_count :bars
end
class Bar < ActiveRecord::Base
belongs_to :foo
end
# Now you can use this in order for each of your Foo instances to come with a preloaded bar_count
foos = Foo.all.
= foos.map(&:bar_count) # only one SQL query executed
This works for any has_many
relationship even if it uses non standard foreign keys or is a has_many :x, through: y
.
By default the count will be distinct, if this is not desired use:
class Foo < ActiveRecord::Base
has_many :bars
can_count :bars, distinct: false
end
Development
After checking out the repo, run bin/setup
to install dependencies. Then, 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
to create a git tag for the version, push git commits and tags, and push the .gem
file to rubygems.org.
Contributing
- Fork it ( https://github.com/trialbee/association_count/fork )
- Create your feature branch (
git checkout -b my-new-feature
) - Commit your changes (
git commit -am 'Add some feature'
) - Push to the branch (
git push origin my-new-feature
) - Create a new Pull Request