Ruby On Rails

Front 1

What are the naming conventions for Models?

Back 1

Table is lower case, plural, underscore delimited: class_clowns

File is located at app/models, is singular and underscore delimited: class_clown.rb

Class name singular is CamelCased: ClassClown

Front 2

What are the naming conventions for Controllers?

Back 2

File is singular, underscore delimited (with _controller at the end) and stored in app/controller: store_controller.rb

Class is singular and CamelCased

Layout is stored in app/views/layouts and be default is controllername.html.erb: store.html.erb

Front 3

What are the naming conventions for Views?

Back 3

File is stored in app/view/controllername: app/views/store/list.html.erb

Helper is ControllerNameHelper (CamelCased) and stored in app/helpers/ and is underscore delimited: store_helper.rb

Front 4

How can you group controllers into Modules?

Back 4

You can group controllers into Modules by putting them in separate folders in the app/controllers directory. The corresponding views have to match the folder structure too.

The controller generator can handle this: ruby script/generate controller Admin::Book action1 action2

Front 5

How do you serialize an object with Rails?

Back 5

You can serialize an object to yaml or json with to_json or to_yaml

Front 6

What does the rails implementation of group_by do?

Back 6

There a few built in RoR functions that are very useful for collections such as group_by. This function takes a code block and groups an array by some attribute or element:

groups = posts.group_by {|post| post.author_id}