Rails is a web based framework it running on the top of the ruby....the developer need not worry about the code its simple and easy to create
the web based applications
Rails components
1) Action pack
a)Action Controller
b)Action Dispatch
c)Action View
2)Action Mailer
3)Active Model
4) Active Record
5)Active Resource
6)Active Support
7)Railties
MVC:---Model , View and Controller
what it does ?
M----> the part of the application it interacts with DBMS(oracle,mysql,postgresql,sqlite,sybase,informix,etc..)
persistent data is accessed
V---->view is the part of the application it paints and designs the screen it shows the output of how we look and feel
of the design
C---->controller it acts as an interface between the model and view it acts as a bridge between by controlling the model
and viewing the application
REST based architecture
REST means Representational State Transfer architecture it is the new method of the architecture we accesing the elements
through the URI(Uniform Resource Identifier) or URL(Uniform Resource Locator) through this method we can access the files
through direct URL
FOR example http://localhost:3000/posts.xml it displays the xml format of our data
http://localhost:3000/posts.html it displays the html format of our data
To create a new project in Rails
rails new myblog
we telling this command to rails starting new project using the keyword new the project name is myblog
it creates the directory called myblog
we can see all the switches using the rails-h command
cd myblog --change directory to myblog
student@student:~$ cd myblog
student@student:~/myblog$ ls
app config.ru doc lib public README test vendor
config db Gemfile log Rakefile script tmp
in the README file it contains the basic documentaion file
student@student:~/myblog/app$ ls
controllers helpers mailers models views
controllers:The program files making up the application itself
Where you store all controllers
Models:Where you store all models
Views:Where you store all views
Layouts:Where you store layouts to make "look and feel" uniform
Where Rails configuration is stored
student@student:~/myblog$ cd config
student@student:~/myblog/config$ ls
application.rb database.yml environments locales
boot.rb environment.rb initializers routes.rb
Config: Info to connect to the database.
student@student:~/myblog/config$ ls
application.rb database.yml environments locales
boot.rb environment.rb initializers routes.rb
student@student:~/myblog/config$ cat routes.rb
routes.rb :Determines the URL to access the application
