Ruby on Rails examples

This is a simple program that renames all files inside a directory.Basically, it adds underscore in the beginning of every file.

[source:ruby]
dir = “C:\\rubywork\\files”

files = Dir.entries(dir)

files.each do |f|
next if f == “.” or f == “..”
oldFile = dir + “\\” + f
newFile = dir + “\\_” + f
File.rename(oldFile, newFile)
end
[/source]

This is might be the site with the highest traffic in the web that uses Ruby on Rails. Yellowpages.com lunched a new Beta site totally written in Ruby, both the service and the web application are written in RoR. We worked very hard to get it out, and you can check it here:

http://ngs.yellowpages.com/

Yellowpages.com receives millions of visits and page views every day. The current yellowpages.com is a J2EE application. The new RoR application will replaces the current one in the end of June.

It is hard to say who is the RoR site with largest traffic, it goes between twitter and yellowpages.com. I feel comfortable to say that we receives more traffic.

I am currently looking to find good Ruby on Rails hosting. I tried two web hosting plans from two different companies, and I am not convinced. I like to run Mongrel on my server, and I really need high availability.

I found a huge list here, but it is hard to choose the perfect web hosting company. Most web site hosting companies are good at Php hosting. I can always find great php hosting, some of these hosting companies runs ruby on rails using light http server or using Fast CGI which seems sucks.

If you have recommendations about good hosting companies, please post a comment.

I appreciate the help.

RoR web hosts:
business web hosting with RoR
wordpress hosting

Rails Render is a strong method that helps you to render your web pages. It comes with many flavors including:

1) Render action: render an action in the current controller, you can specify if you want layout printed or not
[source:ruby]
render :action => “show_home_page”, :layout=> false
[/source]

2) Render partial: renders part of your web page
[source:ruby]
render :partial => “footer”
[/source]

3) Render template: render a page, the file path is relative to your application
[source:ruby]
render :template=> “templates”
[/source]
4) Render file: absolute path is needed
[source:ruby]
render :file => “#{RAILS_ROOT}/public/file.html”
[/source]

5) Render text
[source:ruby]
render :text => “This is rails render”
[/source]

6) Render Json
[source:ruby]
render :json => {:name => “Ruby”}.to_json
[/source]

This is how we issue 301 in Rails

[source:ruby]
def rails_301
headers["Status"] = “301 Moved Permanently”
redirect_to “http://www.newdomain.com”
end
[/source]

Ajax Rails API Here. I really enjoy using this API, you need to type what class, module or method you are looking to and it will get it to you. Then you get the details and enjoy rails development.

These are very interesting slides about scaling twitter:

http://www.slideshare.net/Blaine/scaling-twitter

Enjoy!