Want to automatically detect mobile devices that access your Rails application? Mobile Fu allows you to do just that. People can access your site from a Palm, Blackberry, iPhone, iPad, Nokia, etc. and it will automatically adjust the format of the request from :html to :mobile or :tablet.
gem 'mobile-fu' to your Gemfile and run bundle install.
Add this this one line to the controller.
class ApplicationController < ActionController::Base has_mobile_fu end
Once this is in place, any request that comes from a mobile device will be be set as :mobile format. It is up to you to determine how you want to handle these requests. It is also up to you to create the .mobile.erb versions of your views that are to be requested.
Mobile Fu automatically adds a new
text/html mime type
alias for Rails apps. If you already have a custom
:mobile alias registered in
config/initializers/mime_types.rb, you can remove that.
I recommend that you setup a before_filter that will redirect to a specific page depending on whether or not it is a mobile request. How can you check this?
is_mobile_device? # => Returns true or false depending on the device or is_tablet_device? # => Returns true if the device is a tablet
You can also determine which format is currently set in by calling the following:
in_mobile_view? # => Returns true or false depending on current req. format or in_tablet_view? # => Returns true if the current req. format is for tablet view
Also, if you want the ability to allow a user to switch between 'mobile' and 'standard' format (:html), you can just adjust the mobile_view session variable in a custom controller action.
session[:mobile_view] # => Set to true if request format is :mobile and false if set to :html session[:tablet_view] # => Set to true if request format is :tablet and false if set to :html
So, different devices need different styling. Don't worry, we've got this baked in to Mobile Fu.
If you are including a css or sass file via
stylesheet_link_tag, all you have
to do is add _device to the name of one of your files to override your styling
for a certain device. The stylesheet that is loaded is dependant on which device
is making the request.
e.g., Accessing a page from a Blackberry.
... stylesheet_link_tag 'mobile.css' ...
This loads mobile.css, and mobile_blackberry.css if the file exists.
Supported stylesheet override device extensions at the moment are:
- iphone (iphone,ipod)
The stylesheet awesomeness was derived from Michael Bleigh's browserized styles
Inspiration for Mobile Fu came from Noel Rappin's rails_iui
Hopefully this should help you create some awesome mobile applications.
Testing Mobile Interface
If you want to force the mobile interface for testing, you can either use a
mobile device emulator, or you can call
force_mobile_format in a before filter.
class ApplicationController < ActionController::Base has_mobile_fu before_filter :force_mobile_format end
You can also force the tablet view by calling
class ApplicationController < ActionController::Base has_mobile_fu before_filter :force_tablet_format end
Copyright (c) 2008 Brendan G. Lim, Intridea, Inc., released under the MIT license