Mobylette 2.0+ deprecated the respond_to_mobile_requests method.
Now you must use `include Mobylette::RespondToMobileRequests` instead.
to configure it, see the configuration.
Also stylesheet and javascript helpers were removed.

Mobylette 1.6+ only supports Ruby 1.9.2+
For Ruby 1.8.7 support, please use version < 1.6

Mobylette¶ ↑

<img src=“https://secure.travis-ci.org/tscolari/mobylette.png” /> <img src=“https://gemnasium.com/tscolari/mobylette.png” /> <img src=“https://codeclimate.com/github/tscolari/mobylette.png” />

This gem works by adding the ‘mobile’ format to your rails application. Whenever a request come from a mobile device, if you have your controller mobile enabled, it shall render the view.mobile.erb instead of the view.html.erb (or haml, or whatever).

How does it work?¶ ↑

By adding “respond_to_mobile_requests” in your application_controller (or any other controller), your controllers (or that controller) will understand mobile requests as a new mime type alias “mobile”. This will make the controller to search for the .mobile.erb file instead of the .html.erb. Also you will be able to do:

respond_to do |format|
  format.html   { ... }
  format.mobile { ... }
end

Installation¶ ↑

Add the gem to your gemfile:

gem 'mobylette'

And add to your ApplicationController.rb (for enabling it to all your controllers) or to the controllers you want this functionality on:

include Mobylette::RespondToMobileRequests

After that, you may start adding your .mobile. views.

Helpers¶ ↑

• is_mobile_request?¶ ↑

  This helper returns true if the request comes from a mobile device, false if it does not.

• is_mobile_view?¶ ↑

  Returns if the current format is :mobile or not.

• request_device?¶ ↑

  Returns true/false if the current request comes from the device passed as parameter.

  Examples:

  request_device?(:iphone)
  
  request_device?(:android)
  

  Only :iphone, :ipad, :ios and :android are recognized by default. But you can add other devices, check configuration.

Configuration¶ ↑

You can set the configuration with the mobylette_config method:

mobylette_config do |config|
  ... configuration
end

Custom User Agents¶ ↑

Mobylette works upon detecting the user agent of the visitor browser. By default it will detect any mobile user agent. But you can customize this by passing a proc with a regex of any matching user agent you may wish.

mobylette_config do |config|
  config[:mobile_user_agents] = proc { %r{iphone|ipad}i }
end

Skipping User Agents¶ ↑

If you need to exclude one or more user agents from the mobile format, lets say ipad for example, you may use the :skip_user_agents option:

mobylette_config do |config|
  config[:skip_user_agents] = [:ipad]
end

Fall Backs¶ ↑

Fall backs are handled as a chain of formats. By default the only chain is ‘:mobile => [:mobile, :html]`. You can override this and add your own fall back chains using the `mobylette_config`.

mobylette_config do |config|
  config[:fallback_chains] = {
    mobile: [:mobile, :html],
    iphone: [:iphone, :mobile, :html],
    ...
  }
end

When you create a custom format with fall back chains, ‘:iphone` for example, you must register it as a Mime::Type:

# config/initializers/mime_types.rb
Mime::Type.register_alias 'text/html', :iphone
# this is very important, don't forget!
# :mobile is already registered!

If you don’t want any fall backs, just set it to:

mobylette_config do |config|
  config[:fallback_chains] = { mobile: [:mobile] }
end

XHR Requests¶ ↑

By default the mobile device verification will skip XHR requests, and these will be served as if mobylette wasn’t there. You can override this behavior by setting the :skip_xhr_requests option to false on your controller:

mobylette_config do |config|
  config[:skip_xhr_requests] = false
end

You may need to use this if you are using JQuery mobile or something similar in your application.

Registering Mobile Devices¶ ↑

Mobylette 3.0+ has a ‘request_device?` helper. By default only :iphone, :ipad, :ios and :android devices come registered. But you can register any device using the `mobylette_config` method:

mobylette_config do |config|
  config[:devices] = { my_unique_phone: %r{UniquePhone 1.2.3}, ... }
end

Note: This will not add the device to the mobile user_agent detection. For that read #Custom User Agents.

Skipping mobile filter¶ ↑

In the case you need to skip a mobile_request for been treated as mobile, you can pass the ‘skip_mobile=true` param to the url/request.

For example, you are using jquery_mobile and by that ‘:skip_xhr_requests = false`, but there is a special case where you need to process an Ajax, then you can use this param.

Forcing/Ignoring Mobile Requests¶ ↑

You may force your user to aways render the mobile format, or to aways render the default request format (when the request comes from a mobile device). You can use the session var :mobylette_override for doing it:

session[:mobylette_override] = :ignore_mobile

This will skip the code that would force the mobile format. By doing this, your user will aways render the ‘original’ version of your app.

session[:mobylette_override] = :force_mobile

This will force the mobile format rendering, no matter from where the user is requesting it (unless it’s a xhr request).

session[:mobylette_override] = nil

Notice: ¶ ↑

Be sure you are forcing / skiping mobile requests e.g. in a before_filter like : skip_or_force_mobile BEFORE you are including the Mobylette::RespondToMobileRequests module. Mobylette adds own before_filter to check the session var which would be executed before your filter.

class ApplicationController < ActionController::Base 
  #...

  before_filter :skip_or_force_mobile

  include Mobylette::RespondToMobileRequests

  mobylette_config do |config|
    config[:mobile_user_agents] = proc { %r{iphone|android}i }
    config[:skip_user_agents]   = []
  end

  # ...
  private 

  def skip_or_force_mobile
    session[:mobylette_override] = :ignore_mobile if params[:skip_mobile]
    session[:mobylette_override] = :force_mobile if params[:force_mobile]
  end
end

This will disable any override (default).

If you need to customize how mobile requests are identified you can override the ‘is_mobile_request?` method in your controller, with your own logic. For example, if you want the mobile.app.com to render mobile views, and the app.com to render the normal views:

class ApplicationController << ActionController::Base
  include Mobylette::RespondToMobileRequests

  ...

  private

  def is_mobile_request?
    request.host == "mobile.app.com"
  end
end

Testing¶ ↑

Don’t drive your mobylette without your Helmet! It’s safer to do tests!

For testing, include the Mobylette::Helmet module to your test/test_helpers.rb:

require 'mobylette/helmet'
include Mobylette::Helmet

For RSpec: add to your spec/spec_helpers.rb or create a spec/support/mobylette.rb with the following:

require 'mobylette/helmet'
RSpec.configure do |config|
  config.include Mobylette::Helmet, :type => :controller
end

This will add 3 methods to your test scope:

force_mobile_request_agent(agent = 'Android')

This will force a mobile user_agent, allowing you to test mobile requests.

reset_test_request_agent

This will reset your user_agent to the test default “Rails Testing”. You don’t need to call this every time, all your requests by default are “Rails Testing” in your test env.

set_session_override(override_value)

This will force the session_override value in the users session. Values possible values are: :ignore_mobile and :force_mobile

Friendly note: on your tests, call these functions BEFORE you make the request, otherwise they are useless =p

License¶ ↑

MIT License. Copyright 2012 Tiago Scolari.