ActiveEnumerable

Provides ActiveRecord like query methods for use in Ruby Enumerable collections. Use Hashes or custom Ruby Objects to represent records.

Installation

Add this line to your application's Gemfile:

gem 'active_enumerable'

And then execute:

$ bundle

Or install it yourself as:

$ gem install active_enumerable

Usage

ActiveRecord Like Querying

require "active_enumerable"

class Customers
  include ActiveEnumerable

  scope :unpaid, -> { where(paid: false).or(credit: 0) }
end

customers = Customers.new([{paid: true, credit: 1000}, {paid: false, credit: 2000}, {paid: false, credit: 0}])

customers.unpaid
# => <#Customers [{:paid=>false, :credit=>2000}, {:paid=>false, :credit=>0}]]>

customers.scope { select { |y| y[:credit] >= 1000 } }
#=> <#Customers [{paid: true, credit: 1000}, {paid: false, credit: 2000}]>

customers.sum(:credit)
#=> 3000

customers << { paid: true, credit: 1500 } # accepts Hashes

class Customer
  attr_reader :paid, :credit
  def initialize(paid:, credit:)
    @paid  = paid
    @credit = credit
  end
end

customers << Customer.new(paid: true, credit: 1500) # Or Objects

English Like DSL

require "active_enumerable"

class People
  include ActiveEnumerable

  scope :unpaid, -> { where(paid: false).or(credit: 0) }
end

people = People.new([{ name: "Reuben" }, { name: "Naomi" }])
people.where { has(:name).of("Reuben") }
    #=> <#People [{ name: "Reuben" }]]


people = People.new( [
        { name: "Reuben", parents: [{ name: "Mom", age: 29 }, { name: "Dad", age: 33 }] },
        { name: "Naomi", parents: [{ name: "Mom", age: 29 }, { name: "Dad", age: 41 }] }
      ] )

people.where { has(:parents).of(age: 29, name: "Mom").or(age: 33, name: "Dad") } 
    #=>  <#People [{ name: "Reuben", parents: [...] }, { name: "Naomi", parents: [...] }]

Development

After checking out the repo, run bin/setup to install dependencies. Then, run rake spec 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

This is a community project and commit access will be granted to those who show interest by having a history of acceptable pull-requests.

Bug reports and pull requests are welcome on GitHub at https://github.com/zeisler/active_enumerable. 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.