Ruby on Rails envy part 2 – The first webapplication
augustus 10, 2010
Fire up Putty and log on to our newish ROR virtual appliance!
Oh wait. First I have to think of something we are going to create. So how about a Marketplace app, where supply and demand meets? And since we’re so into a free society, let’s make it an app where no money is allowed. So we’re going to exchange goods and services. What do we need?
- List all open requests
- Create a new request
- Read and display a request
- Update the request
- Delete the request
That will be enough for now. So, what are the features of the request?
- name – name of the requester (string)
- contents – the textbody of the request (text)
- title – the title of the request (string)
Now start up Putty and log on to the BitNami server.
This is something like File -> New Project -> ASP.NET MVC 2 application in Visual Studio. With this command, you’ll create the complete web application in a folder ‘fleemarket’. If I cd into this new folder I get to see:
app db lib public README test vendor
config doc log Rakefile script tmp
Right, now let’s run it. After all, in VS I can also start debugging right after the creation of my project:
Anyhow, we’ll get the following output as the server is starting. So we need to open up another instance of Putty for editing.
root@linux:/opt/bitnami/projects/fleemarket# ruby script/server
=> Booting Mongrel
=> Rails 2.3.5 application starting on http://0.0.0.0:3000
=> Call with -d to detach
=> Ctrl-C to shutdown server
So, let’s create the Request class first.
root@linux:/opt/bitnami/projects/fleemarket# ruby script/generate scaffold request requester:string title:string contents:string
So, Rails created a controller and a view apparently. And now for the database.
root@linux:/opt/bitnami/projects/fleemarket# rake db:migrate
== CreateRequests: migrating =================================================
== CreateRequests: migrated (0.0042s) ========================================
I am done. And then check out what I’ve just created. A complete CRUD thing with a database.
Next time, let’s check out what just happened under da hood.