Hashid Rails

This gem allows you to easily use Hashids in your Rails app. Instead of your models using sequential numbers like 1, 2, 3, they will instead have unique short hashes like "yLA6m0oM", "5bAyD0LO", and "wz3MZ49l". The database will still use integers under the hood, so this gem can be added or removed at any time.

Installation

Add this line to your application's Gemfile:

gem 'hashid-rails'

And then execute:

$ bundle

Or install it yourself as:

$ gem install hashid-rails

Basic Usage

1. Include Hashid Rails in the ActiveRecord model you'd like to enable hashids.

class Model < ActiveRecord::Base
  include Hashid::Rails
end

2. Continue using Model#find passing in either a hashid or regular 'ol id.

@person = Person.find(params[:hashid])

Get hashid of model

You can access the hashid of any model using the hashid method.

model = Model.find(params[:hashid])
#=> <Model>
model.hashid
#=> "yLA6m0oM"

Additionally, the to_param method is overriden to use hashid instead of id. This means methods that take advantage of implicit ID will automatically work with hashids.

Passing a hashid model to `link_to`…
<%= link_to "Model", model %>

will use `hashid` instead of `id`.
<a href="/models/yLA6m0oM">Model</a>

Alternative Usage

You can use the Model#find_by_hashid method to find a record without falling back on the standard find method.

# When a record is found, it returns the record.
@person = Person.find_by_hashid(params[:hashid])
#=> <Person>

# When no record, it returns nil
@person = Person.find_by_hashid(params[:hashid])
#=> nil

# A bang (!) version is also available and raises an exception when not found.
@person = Person.find_by_hashid!(params[:hashid])
#=> ActiveRecord::RecordNotFound

Configuration (optional)

You can add an initializer for Hashid::Rails to customize the options passed to the Hashids gem. This is completely optional. The configuration below shows the default options.

Hashid::Rails.configure do |config|
  # The salt to use for generating hashid. Prepended with table name.
  config.salt = ""

  # The minimum length of generated hashids
  config.min_hash_length = 6

  # The alphabet to use for generating hashids
  config.alphabet = "abcdefghijklmnopqrstuvwxyz" \
                    "ABCDEFGHIJKLMNOPQRSTUVWXYZ" \
                    "1234567890"

  # Whether to override the `find` method
  config.override_find = true
end

Development

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.

Contributing

1. Fork it ( https://github.com/[my-github-username]/hashid-rails/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