simple_group

simple_group gem is able to add group function to ActiveRecord.

Add this line to your application's Gemfile:

gem 'simple_group'

And then execute:

$ bundle install

simple_group uses a simple_group_combinations table to store all group information. To genarate and run the migration just use.

$ bin/rails g simple_group:migration
$ bin/rake db:migrate

Animal model

class Animal < ActiveRecord::Base
  groupable
  validates :name, presence: true
end

Fruit model

class Fruit < ActiveRecord::Base
  groupable
  validates :name, presence: true
end

class MyGroup < ActiveRecord::Base
  add_group_function

  validates :name, presence: true
  validates :user, presence: true
end

user = User.create(name: 'Taro')
group = MyGroup.create(name: 'Animals', user: user)

# group add a dog
dog = Animal.create(name: 'dog')
group.add(dog)

# cat add to group
cat = Animal.create(name: 'cat')
cat.add_to_group(group)

# group remove a dog
group.remove(dog)

# item list in group
group.group_items

# Only animal
group.for_type(Animal)

# Only fruit
group.for_type(Fruit)

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.

1. Fork it ( https://github.com/patorash/simple_group/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