rebase_attr

Convert an attribute to a specified base.

When do you need this?

• If your IDs are too long to show, just convert to base 36 (digits and lower case letters).

Installation

Add this line to your application's Gemfile:

gem 'rebase_attr'

And then execute:

$ bundle

Or install it yourself as:

$ gem install rebase_attr

Usage

Example for an active record table with long IDs:

# == Schema Info
#
# Table name: medical_bills
#
#  id                  :integer(11)    not null, primary key
#

class Bill < ActiveRecord::Base
  rebase_attr :id, to: 32, readable: true # digits and leters, without '0', 'o', '1' and 'l'
end

Then use it:

bill = Bill.find(3151957185711)
bill.id
=> "2rnfkjw5f"
bill.id_without_rebase
=> 3151957185711
bill.id = "gw88yeya"
bill.id_without_rebase
=> 572581263402

Other functions you get when using rebase_attr:

bill.id_without_rebase = 3151957185711
bill.id
=> "2rnfkjw5f"
Bill.find(Bill.decode_id("2rnfkjw5f"))
=> #<Bill id: 3151957185711>
bill.decode_id("2rnfkjw5f")
=> 3151957185711
Bill.encode_id(3151957185711)
=> "2rnfkjw5f"
bill.encode_id(3151957185711)
=> "2rnfkjw5f"

Options you can pass to rebase_attr:

# Have :x return base 16, while '0' and '1' are replaced with 'x' and 'y', and then uppercased.
rebase_attr :x, to: 16, readable: true, convert: :upcase
# Have both :x and :y converted from a backend of octal string to a binary string, adding a 'b' in the beginning.
rebase_attr :x, :y, from: 8, to: 2, convert: -> (v) { "b#{v}" }, deconvert: -> (v) { v[1..-1] }

Contributing

1. Fork it ( https://github.com/odedniv/rebase_attr/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