First, I'm going to put all our cache magic in the Model to keep it out of the Controller code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 # controller def show @ = Post .lookup_by_id(params[ :id ]) fresh_when ... .. end # Post model class Post < ActiveRecord :: Base def self . lookup_by_id (id) Rails .cache.fetch " post_by_id: …
…servers we used to have the luxury of the iDRAC card - Integrated Dell Remote Access Controller (I often wondered what the acronym meant!) - other manufacturers like HP, IBM, etc would all have something similar. Essentially, it lived on a different network connection, and gave you remote access to the machine - even when things had gone badly wrong. You could even mount ISO files over the network - meaning you could install Operating Systems over it - great for when things had all gone …
Step 5 of my Six . to a Faster Rails Appalso adds methods to your Controller code to allow you to process yourself and reduce the overhead of creating and sending a response, getting to
The main method is fresh_when , the other helper is stale? , which is implemented as a call to fresh_when and then return a boolean to indicate what that call did. fresh_when , if it decides that thevalue in the request matches the ETag value it calculates …
…the primary interface with which we access the program logic. In other words, instead of asking the Controller setup the, we're asking the View to setup the Controller.
A different transport backend . Tim Bray talks about the example of substituting Net:: with in his testing example, but this may as well be an example of a real world application and not just a testing scenario. Maybe we want to take our monolithic class and instead run our …
…surprisingly good example, by way of ActiveSupport::Notifications . Controller requests are instrumented just as database queries of any kind.
There's not much a client library needs to do to emit measurements of network requests. The ones forcould start by adding optional …
The controller is simple (standard actions removed). Keep scrolling down. # controllers/organizations_controller.rb class OrganizationsController < ApplicationController def new @ organization = Organization.new @organization.sub_units.build end
def create @ organization = Organization.new(params[:organization])
if @organization.save redirect_to @ organization, notice: 'Organization was successfully created.' else render :new …
Keep business logic out of the Controller and Views
Add validation support using ActiveModel includes
Display data validation errors in the form
Use ActiveModel naming conventions for generating form endpoints
Create the routes needed for displaying a web form and posting the data
Restrict resources to the routes you need using only: # config/routes.rb resources :registration, only: [:new, :create]
Controller and Actions
Create a controller with new and create …
…release. The only conflicts I ran into when merging was with the Readme and a single Controller file. These were very easy fixes because I knew what to do. If you're not sure, check the forums or IRC for the framework you're working with.
Adding the Framework
First, let's add the framework's repository (In Laravel's case, simply git://github.com/laravel/laravel.git), which will give us the ability to reference that repository when running our git pull/push …
…strong_parameters is integrated directly into. All Controller parameters must now be explicitly permitted before they can be used in Active Model mass assignments.
As of 392eeecc Rails allows specifying the transaction isolation level in Active (if your database supports it).
It's an early draft, but the Rails 4.0 are now on the Edge Guides site. Notes
…already eager loads your models, controllers, etc and if you are actually using Action Controller, you will have a controller inheriting from ActionController::Base which then forces it to be loaded on boot.
Similar reasoning applies to most of Active Model modules. There is no need to eager load ActiveModel::Validations because if an application is using it, it will load a framework or a model that actually requires it on boot. You will find that this reasoning will probably apply to …