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.
Simply add 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
endOnce this is in place, any request that comes from a mobile device will 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.
If you do not want to set the format to :mobile or :tablet and only use the helper functions, pass false as an argument.
class ApplicationController < ActionController::Base
has_mobile_fu false
endIf you dont want to have all the methods respond to :mobile and :tablet, you can opt-in this actions
using the following class method: has_mobile_fu_for :action
Example:
class YourAwesomeClass < ActionController::Base
has_mobile_fu
has_mobile_fu_for :index
def index
# Mobile format will be set as normal here if user is on a mobile device
end
def another_method
# Mobile format will not be set, even if user is on a mobile device
endMobile Fu automatically adds a new :mobile and :tablet to 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 tabletYou 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 viewAlso, 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 :htmlIf you want to use the default response templates, like index.html.erb, instead of the index.tablet.erb you can
exclude the tablet rendering from beeing used:
you can create a before_filter and put it before the has_mobile_fu call
before_filter :force_tablet_html
has_mobile_fu
def force_tablet_html
session[:tablet_view] = false
endSame will work for mobile, just change the tablet values to mobile
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:
- blackberry
- iphone (iphone,ipod)
- ipad
- android
- mobileexplorer
- nokia
- palm
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.
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
endYou can also force the tablet view by calling force_tablet_format instead
class ApplicationController < ActionController::Base
has_mobile_fu
before_filter :force_tablet_format
endCopyright (c) 2008 Brendan G. Lim, Intridea, Inc., released under the MIT license
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