11 Apr '12, 11pm

"Observers" class UserObserver < ActiveRecord::Observer; def after_create

Database constraints and/or stored procedures make the validation mechanisms database-dependent and can make testing and maintenance more difficult. However, if your database is used by other applications, it may be a good idea to use some constraints at the database level. Additionally, database-level validations can safely handle some things (such as uniqueness in heavily-used tables) that can be difficult to implement otherwise. Client-side validations can be useful, but are generally unreliable if used alone. If they are implemented using JavaScript, they may be bypassed if JavaScript is turned off in the user’s browser. However, if combined with other techniques, client-side validation can be a convenient way to provide users with immediate feedback as they use your site. Controller-level validations can be tempting to use, but often become unwieldy and difficult to t...

Full article: http://guides.rubyonrails.org/active_record_validations_c...

Tweets

しかし例外クラスを指定する方法は無さそうだな…。save! は、errors[] が空でなけれ...

guides.rubyonrails.org 11 Apr '12, 11pm

Database constraints and/or stored procedures make the validation mechanisms database-dependent and can make testing and m...

Ruby on Rails Guides: Active Record Validations...

guides.rubyonrails.org 13 Apr '12, 4pm

Database constraints and/or stored procedures make the validation mechanisms database-dependent and can make testing and m...

"4.3.2 Options for has_many"

guides.rubyonrails.org 11 Apr '12, 11pm

is a connection between two Active Record models. Associations are implemented using macro-style calls, so that you can de...

Ruby on Rails Guides: Performance Testing Rails...

guides.rubyonrails.org 10 Apr '12, 8am

# routes.rb root :to => 'home#index' resources :posts # home_controller.rb class HomeController < ApplicationController de...

omgbloglol - Improved validations in Rails 3:

omgbloglol.com 30 Mar '12, 8am

Improved validations in Rails 3 Quite sorry about not getting another post up sooner; I’ve been very busy lately with a fe...

You want to see more pictures of the new GL-Class and get some information? Go here:

You want to see more pictures of the new GL-Cla...

mercedes-benz.com 10 Apr '12, 6pm

One of the strengths of the new GL-Class is enabling relaxed and therefore safe driving under all possible conditions. Wit...

Google Reports $10.65 Billion in Q1 2012 Revenue, Proposes New Class of Stock

Google Reports $10.65 Billion in Q1 2012 Revenu...

searchenginewatch.com 12 Apr '12, 8pm

Google revenues topped $10 billion for the second quarter in a row, coming in only slightly higher than their Q4 2011 $10....

Fastest electric car on ice! Students break record: A group of students have broken the speed for the fastest el...

Fastest electric car on ice! Students break rec...

thegreencarwebsite.co.uk 11 Apr '12, 11am

A group of students have broken the speed for the fastest electric car on ice. Students from the Helsinki Metropolia Unive...

Science: LHC smashes particle collision record - #sci

Science: LHC smashes particle collision record ...

electronicsweekly.com 11 Apr '12, 9am

Science: LHC smashes particle collision record Lisa Grossman, New Scientist Wednesday 11 April 2012 00:03 The Large Hadron...

Sedo announces record high prices,according to ...

domainnews.com 11 Apr '12, 6pm

Sedo has recently announced record high prices in the domain name industry ,according to IDNX domain name price index. You...

You Have Just Experienced the Hottest US Winter...

treehugger.com 10 Apr '12, 4pm

Another day, another alarming chunk of evidence that the planet is continuing to warm at a disturbing pace. The latest com...