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

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:1234567891011121314151617181920212223242526272829303132class SpecializationType < Act...

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The 15 best gems for ruby on rails web applications

The 15 best gems for ruby on rails web applications

In this post I will share the technology stack that we use in DevInterface in order to create Ruby on Rails web applications.From my point of view, the gems that I’ll show later in this article represent the best options to develop in an Agile and DRY way and to achieve complex solutions in the shortest time possible.These gems are the “core” of each our Gemfile because they allow to solve the most common problems that face in every application. In support of these gems, there are lot of ge...

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How to insert more Disqus comments box in a single page

Hello everyone! For those not familiar Disqus is a platform that allows you to easily insert a box for comments on any website and allows users to use the their Facebook or Twitter account (but not only) to authenticate. The limit of Disqus is that it associates any thread of comments to a unique url. Consequently, it will expect that in every page there is only a comment box. ...

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Tips: Multiple pagination with will_paginate

Will Paginate is a great and widely used gem for pagination in Ruby on Rails.Sometimes you need to paginate multiple list on the same page.This tip show you how to put a list of paginated products and a list of of paginated services on the same page with will_paginate. The key point is to use a custom param param_name in the view and also in the controllerThe view code is something like this:123# ... # products ...

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How to send email asynchronously using Devise and Rails3

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_asy...

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Ruby on Rails and jQuery: multiselect with checkbox

Ruby on Rails and jQuery: multiselect with checkbox

Today I want to present a very convenient jQuery plugin I’ve used to create a combo box with checkboxes for a multi-selection field.Suppose we have a form of insertion / modification of user data, and that the user can have multiple functions. We start with rendering the form with a multi-selection field, where you can select more functions with the combination “<ctrl> + click “.123456789101112<%=...

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How-to send email with a Google account form Ruby On Rails

I have seen many articles in the web that explain how to send an email with a Google account from a Ruby On Rails application. However, I believe there are several faulty or incomplete examples around. That’s why I decided to share a working solution that I used in various projects.The main problem with Gmail (or with an address linked to Google Apps) is that p...

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Different layout for the same controller

In some projects can happen that you have to use different graphic templates for different methods of the same controller. At first sight one would implement a solution that provides an explicit call to the desired layout within each action.Something like this:123456789101112131415161718192021class PostController < ApplicationController def index...

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