Rostra allows you to quickly add a question and answer forum to your application. Requires Rails 3.1 and Ruby 1.9.2.

NOTE: Rostra is not production ready.


Include the gem to your Gemfile:

gem 'rostra'

Mount the engine in config/routes.rb:

mount Rostra::Engine => "/rostra"   # or whatever path you like

Install and run the necessary migrations:

rake rostra:install:migrations
rake db:migrate

Run the generator to create config/initializers/rostra.rb and app/helpers/application_helper.rb:

rails generate rostra:install

Call rostra in your user model:

class User < ActiveRecord::Base

Basic configuration

There's some stuff you'll almost definitely want to do in order to get Rostra working correctly for your app. First, set the default_url_options for your app. In each of your config/environment files you should have something like:

config.action_mailer.default_url_options = { :host => '' }         # test.rb
config.action_mailer.default_url_options = { :host => 'localhost:3000' }   # development.rb
config.action_mailer.default_url_options = { :host => '' }  # production.rb

Also, be sure to read through config/initializers/rostra.rb and override configuration options to suit your app. At the very least, you'll want to change:

config.deliver_emails_from = ''

Finally, have a look at app/helpers/rostra/application_helper.rb, you may need to add/override helper methods.

Overriding models

Rostra provides a DSL for adding application specific logic to Rostra::Question and Rostra:Answer:

class User < ActiveRecord::Base
  rostra do
    questions do
      # Code inside this block will be evaluated in the context of `Rostra::Question`.

      # So an instance method might look like:
      def active?
        # call this like

    answers do
      # Code inside this block will be evaluated in the context of `Rostra::Answer`

      # So a class method might look like:
      def self.recently_up_voted
        # call this like Rostra::Answer.recently_up_voted


Overriding Controllers

Added instructions for overriding controllers here (including generators!)

Setting permissions

Under the hood, Rostra uses CanCan to set permissions. By default anyone can read rostra content - even if they are not logged in. A user can contribute content (i.e. ask questions, give answers, and leave comments) as long as they've logged in.

If you need to change these defaults, override can_participate_in_rostra? in your user model. CanCan will use this method to determine who can participate. If you need to specify even more complicated permissions, override app/models/rostra/ability.rb and go wild.

Contributing to Rostra

Fork the project, make your changes, and submit a pull request. Please ensure the tests pass:

rspec spec         # runs the specs
cucumber features  # runs the cukes

Contributors: robertwalsh0, bcody


This project uses MIT-LICENSE.