range_scopes.rb

module RangeScopes
  extend ActiveSupport::Concern
  
  module ClassMethods
     
    # Order.between(1..5) => pulls all orders who's ids are between 1 and 4
    # Order.between(:customer_id, 1..4) => pulls all orders who's orders.customer_id is between 1 and 4
    def between(*args)
      column = args.first.is_a?(Symbol) ? args.shift : :id
      range  = args.first
      where(column, range)
    end

    # Order.created_between(1.day.ago..Time.now) => pulls all orders where the created_at is between the range
    def created_between(range) 
      between(:created_at, range) 
    end

    # Order.since(1) => pulls all orders where the id is greater than
    # Order.since(:customer_id, 1) => pulls all orders where the provided column id is greater than
    def since(*args)
      column = args.first.is_a?(Symbol) ? args.shift : :id
      where("#{column.to_s} > ?", args.first)
    end

    # Order.created_since(1.day.ago) => pulls all orders where it was created after 1.day.ago
    def created_since(datetime)
      since(:created_at, datetime) 
    end

    # Order.updated_since(1.day.ago) => pulls all orders where it was updated after 1.day.ago
    def updated_since(datetime)
      since(:updated_at, datetime) 
    end

    # Order.before(5) => pulls all orders where the id is less than
    # Order.before(:customer_id, 5) => pulls all orders where the provided column id is less than
    def before(*args)
      column = args.first.is_a?(Symbol) ? args.shift : :id
      where("#{column.to_s} < ?", args.first)
    end

    # Order.created_before(1.days.ago) => pulls all orders where the order was created before
    def created_before(datetime)
      before(:created_at, datetime)  
    end

    # Order.updated_before(1.days.ago) => pulls all orders where the order was updated before
    def updated_before(datetime)
      before(:updated_at, datetime)  
    end
  end
end

range_scopes_initializer.rb

# Apply to all ActiveRecord::Base models
ActiveRecord::Base.send :include, RangeScopes