As you can see, I am not a huge fan. So when someone comes along offering a way to use Ruby on the browser, sign me up! In the first part of this article, I will introduce Opal and show how to get Opal set up. Hello, Opal! That someone who came along happens to be Adam Beynon, creator of Opal. Getting Opal Fire up a terminal: Notice that we are also installing opal-jquery. Let’s give Opal in spin in irb: Conway’s Game of Life in Opal It’s time to get our hands dirty and feet wet with Opal. In case you are not familiar with Conway’s Game of Life (or too lazy to read the Wikipedia entry): It starts with an empty grid of square cells. Here, there 5 cells that are alive. At each tick, a cell can undergo a transition based on four rules: Rule 1 Any live cell with fewer than two live neighbors dies, as if caused by under-population. Rule 2 Rule 3 Rule 4 1. Ruby on Rails for PHP and Java Developers - Deepak Vohra. Easier Nested Layouts in Rails 3/4 • 55 Minutes Blog.
As you know, the Controller is responsible for orchestrating the whole process of handling a request in Rails, though it normally hands off any heavy code to the Model. But then, when it's time to send a response back to the user, the Controller hands things off to the View. It's that handoff that is the subject of this guide.
In broad strokes, this involves deciding what should be sent as the response and calling an appropriate method to create that response. If the response is a full-blown view, Rails also does some extra work to wrap the view in a layout and possibly to pull in partial views. 2 Creating Responses From the controller's point of view, there are three ways to create an HTTP response: 2.1 Rendering by Default: Convention Over Configuration in Action You've heard that Rails promotes "convention over configuration". 2.2 Using render. Ruby on Rails Tutorial | Softcover.io. My former company (CD Baby) was one of the first to loudly switch to Ruby on Rails, and then even more loudly switch back to PHP (Google me to read about the drama).
This book by Michael Hartl came so highly recommended that I had to try it, and the Ruby on Rails Tutorial is what I used to switch back to Rails again. Though I’ve worked my way through many Rails books, this is the one that finally made me “get” it. Everything is done very much “the Rails way”—a way that felt very unnatural to me before, but now after doing this book finally feels natural.
This is also the only Rails book that does test-driven development the entire time, an approach highly recommended by the experts but which has never been so clearly demonstrated before. Finally, by including Git, GitHub, and Heroku in the demo examples, the author really gives you a feel for what it’s like to do a real-world project. The tutorial’s code examples are not in isolation.
The linear narrative is such a great format. Enjoy! An Introduction to Web Development Using the Ruby on Rails Framework. Click here to view the complete list of archived articles This article was originally published in the Fall 2006 issue of Methods & Tools An Introduction to Web Development Using the Ruby on Rails Framework Nico Mommaerts Ruby on Rails is probably the most talked about and most controversial Web framework since the Internet was invented.
After reading this gentle introduction, you will finally know what people all over the world are raving about! Introduction Ever since companies discovered the merits of writing applications for the Web, people have been writing frameworks for making the work of a Web developer easier. Given this complex environment to develop for, it is very easy to write unmaintainable code. There is however one architectural pattern that most user-interface related frameworks implement, and that is the MVC pattern. What is Rails? Ruby on Rails is a full stack, cross-platform open source framework. Go to part 2 Back to the archive list. Transactions In Rails - Mark Daggett's Blog. Recently I was tasked to write tests for the transactions of an existing application. This gave me the opportunity to learn more about the codebase, while also improving the test coverage. Generally, most of the transaction code looked fine.
However, there were some instances where transactions were used incorrectly or inefficiently. I assumed this is just because of a misunderstanding of how transactions work within Rails, and so I thought iʼd take some time and give an overview of the common errors I found and some best practices for using transactions in Rails. Let me also state at the beginning that most of these examples are not my own, they come directly from the Rails source, which give example usages of applying transactions RTFM FTW.
Reasons for transactions We use transactions as a protective wrapper around SQL statements to ensure changes to the database only occur when all actions succeed together.