Add this line to your application's Gemfile:
And then execute:
Or install it yourself as:
$ gem install sequel-through
# Load the plugin Sequel::Model.plugin :cyclical_through_associations class User < Sequel::Model one_to_many :user_has_security_groups one_to_many :security_groups, through: :user_has_security_groups one_to_many :privileges, through: :security_groups end class SecurityGroup < Sequel::Model one_to_many :security_group_has_privileges one_to_many :privileges, through: :security_group_has_privileges end class Privilege < Sequel::Model end class UserHasSecurityGroup < Sequel::Model many_to_one :user many_to_one :security_group one_to_many :privileges, through: :security_group end class SecurityGroupHasPrivilege < Sequel::Model many_to_one :security_group many_to_one :privilege end # Solve any cyclical dependencies (when :cyclical_through_associations is used) Sequel::Model.solve_cyclical_associations! # Use the intermediate associations User.first.security_groups # => [#<SecurityGroup 1>, #<SecurityGroup 2> ...] User.first.privileges # => [#<Privilege A>, #<Privilege B> ...]
This plugin adds an optional
:through key for
*_to_many associations. When
:through is provided, intermediary associations are traversed and a single
many_through_many association is added to the base model using a JOIN structure calculated from the associations traversed.
After checking out the repo, run
bin/setup to install dependencies. Then, run
rake test 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/kenaniah/sequel-through.
The gem is available as open source under the terms of the MIT License.