Humanizer

Humanizer is a very simple CAPTCHA method. It has a localized YAML file with questions and answers which is used to validate that the user is an actual human. Any model that includes ActiveModel::Validations should work. Our aim is to be database and mapper agnostic, so if it doesn't work for you, open an issue. Humanizer works with Rails 3–7.

Add humanizer to your Gemfile:

gem "humanizer"

Bundle and run the generator in terminal:

bundle
rails g humanizer

• Install all locales: rails g humanizer --all-locales
• Show available locales: rails g humanizer --show-locales
• Install selected locales: rails g humanizer en fi de

1. In your model, include Humanizer and add the #require_human_on method, example:

class User < ActiveRecord::Base
  include Humanizer
  require_human_on :create
end

2. Ask the question in the form, example:

<%= f.label :humanizer_answer, @model.humanizer_question %>
<%= f.text_field :humanizer_answer %>
<%= f.hidden_field :humanizer_question_id %>

3. If you are using attr_accessible, remember to whitelist :humanizer_answer and :humanizer_question_id.

4. If you are using strong_parameters, remember to permit :humanizer_answer and :humanizer_question_id.

Alternatively, you many use the built in HumanizerHelper class instead of using your own model (useful for something like a contact form if you don't have a model/class for this). Behavior is the same including Humanizer on a model, but all setters are available as optional arguments when initializing a HumanizerHelper instance.

1. Example initialization code(controller):

@humanizer_helper = HumanizerHelper.new

2. Example rails form usage:

<%= label_tag :humanizer_answer, @humanizer_helper.humanizer_question %>
<%= text_field_tag :humanizer_answer %>
<%= hidden_field_tag :humanizer_question_id, @humanizer_helper.humanizer_question_id %>

3. Example response handling:

humanizer_helper = HumanizerHelper.new(humanizer_answer: params[:humanizer_answer], humanizer_question_id: params[:humanizer_question_id])
if humanizer_helper.humanizer_correct_answer?
  do_stuff
end

A HumanizerHelper instance provides an additional get_correct_humanizer_answer method to make testing easier. Example:

  question_id = find('#humanizer_question_id', visible: false).value #gets humanizer question id from example form above
  humanizer_helper = HumanizerHelper.new(humanizer_question_id: question_id)
  fill_in 'humanizer_answer', with: humanizer_helper.get_correct_humanizer_answer #fills in answer field from example above with the correct answer

Default translations can be found in config/locales/

You might want to add/change question and answer pairs. This can be easily done by adding/modifying entries in locales file.

You might want to skip the humanizer validations on your tests or rails console.

You can just have a simple attribute on your model and use it to bypass the validation. Here's an example:

attr_accessor :bypass_humanizer
require_human_on :create, unless: :bypass_humanizer

Now when bypass_humanizer is true, validation will be skipped.

In case you want to give your users the option to change the question, there's a #change_humanizer_question method to help you.

To make sure the current question doesn't get asked again, you can pass the current question id to the method. For example:

@user.change_humanizer_question(params[:user][:humanizer_question_id])

Humanizer is licensed under the MIT License, for more details see the LICENSE file.

• English, Finnish and Portuguese translations by Kisko Labs
• German by Sven Schwyn
• Dutch by Joren De Groof
• Brazilian Portuguese by Britto
• Russian by Shark
• Spanish by Juanjo Bazán
• Polish by Maciek O
• Italian by Alberto Vena
• Chinese (Simplified) by Crane Jin

• Florian Bertholin
• seogrady
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• Calvin Delamere