New in Rails 4.0: Shared Record Pattern in Controllers
Rails 4.0 will encourage developers to use the shared record pattern in controllers. Scaffold generators in Rails 4.0 will use by default. Here's an example of using the pattern.
class PostController < ActionController::Base
before_action :set_post, except: [:index, :new, :create]
def show
# do something with @post
end
private
def set_post
@post = Post.find(params[:id])
end
end
Basically, instead of calling Post.find(params[:id])
in show
, edit
, update
and delete
actions manually, you do it once in the set_post
method.
Attentive readers may have noticed another change: before_filter
will be called before_action
in Rails 4.0.
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