How to implement dependent dropdowns in Rails 4 with an unobtrusive jQuery script

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I recently had to implement a view with the classic search form with two select dependent on each other. My aim was to leave the page as clean as possible and make the code that loads the options for the daughter dropdown reusable.Suppose, therefore, to have two models, SpecializationType and Specialization, defined as follows:1234567891011121314151617181920212...

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Two step signup with Devise

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[** UPDATE: 21/01/2013 **]: Thanks to Kevin Triplett now there's a Devise wiki page referencing this post and combining the comments. Please check this wiki page, especially if you’re using Rails 3 and Devise 2: https://github.com/plataformatec/devise/wiki/How-To:-Email-only-sign-up On my Ru...

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Prevent registration of reserved login

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Every time you create a web application where users can register, it is good to exclude some login or username so that they can not be used. A classic example is the login "admin". I believe that no one wishes that in its application will be a registered user with the username "adm...

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How to send email asynchronously using Devise and Rails3

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Hello everyone.I’d show a workaround to send email asynchronously using Devise and Rails3.Suppose we have already up and running our application with Devise and delayed_job correctly installed.A first attempt was to add in config/initializers the following file (devise_async.rb):12345678910111213141516#devise_async.rb module Devise module Models module Confirmable handle_asynchronously :send_confirmation_instructions end...

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Ruby Enumerables: Operation on hashes

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In my last post I talked about Ruby's hash. Today I will resume and complete the argument by describing some of the things you can do to manipulate the hash values. 1. How to iterate over Hash elements The Ruby Hash class provides three different iterators: each, each_key, each_value. There is actually a fourth iterator, each_pair but it is only an alias of each. As you can expect the each iterator works as follows: {"company" => ...

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Ruby Enumerables: Hashes

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The most famous framework based on Ruby language, Ruby on Rails, makes extensive use of hash. And cause in our blog we talk mainly about development with Ruby on Rails it seem fair to me to explore some language constructs that are widely used by the Rails framework. In this and in the next posts I will briefly present characteristics and properties of some of the most widely used constructs, starting from Hash. Hashes, also known as ...

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