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Subrails

Adding better subdomain support to rails 3

Routing

scoping routes to a subdomain:

# this:
subdomain :www do
  …
end

# is equal to this
constraints(:subdomain => 'www') do
  defaults(:subdomain => 'www') do
    …
  end
end

scoping routes to multiple subdomains:

# this:
subdomain :things, :stuff, :radsauce do
  …
end

# is equal to this
constraints(lambda{ |req| [:things, :stuff, :radsauce].include? req.subdomain.to_s }) do
  …
end

redirecting to another subdomain

match 'posts(/:id)' => redirect('blog/posts/%{id}', :subdomain => :www)

Url Helpers

subrails adds support for the :subdomain option to url_for

root_url                        #=> 'http://www.example.com'
root_url(:subdomain => 'blog')  #=> 'http://blog.example.com'

Rspec

Controller tests that respond to routes that include a subdomain restraint require that your pass :subdomain => '…' as a parameter when requesting an action.

For example:

Given the following routes

subdomain :blog do
  resources :posts
end

This no longer works

describe PostsController do
  it "should respond to the index action" do
    get :index # => Unknown Route
  end
end

You now need to include the appropriate subdomain param

describe PostsController do
  it "should respond to the index action" do
    get :index, :subdomain => 'blog'
  end
end

to make this easier we've added a default_params hash that is reverse merged into your params so you can again do this:

describe PostsController do
  before do
    default_params[:subdomain] = 'www'
  end

  it "should respond to the index action" do
    get :index
  end
end
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