Ruby on Rails: What you need to know

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Ruby on Rails is an open-source web application framework which comes under MIT license.

Ruby on Rails:

Just like PHP and C++, Ruby is a programming language through which you can write codes. Rails is a framework which is entirely dependent on Ruby. In the world of Programming, Ruby On Rails is highly connected with the startups.

Ruby on Rails is an open-source web application framework which comes under MIT license. There are already more than thousands of apps build via Ruby On Rails services. Both big companies and startups have already adopted this platform due to its robust building tools and features. The latest version of Ruby of Rails is 6.0.0. However, it is in release candidate(RC) mode.


Pre-requisites to learn Ruby on Rails

  • Learn HTML, CSS JavaScript
  • Before moving on to the Rails, learn Ruby
  • After Ruby, you can start learning Rails


Features of Ruby on Rails

Let's discuss some of the fascinating features of Ruby on Rails 6.0:


Multiple database support

In the latest version, the support for multiple database connections has been added for your application. Certainly, the selection of the application's design is all yours. Even if you want to add some read replicas for your app, or to divide your app into multiple microservices with each of one having their own separate database. Howver, how to switch to different databases?

class AnimalsModel  ApplicationRecord
  self.abstract_class = true
  connects_to database: { writing: :animals_primary, reading: :animals_replica }

class Dog AnimalsModel
  # connected to both the animals_primary db for writing and the animals_replica for reading

You can also have a look at the official Github Page of ROR, where the documentation is presented nicely.


Native webpacker support

The introduction of webpacker was performed in the earlier 5.1 version of ROR. It helped simplify the use of JavaScript pre-processor much easier. Native webpacker is also be used for images, fonts, and CSS. Webpacker has now replaced Sprockets for being the default JavaScript bundle for the Rails. Webpacker has brought significant relief to the front-end developers.



A new Ruby on rails code loader was introduced in this version  - Zeitwerk which is thread-safe, effective, and matches Ruby semantics for constant. Zeitwerk assures to load the modules and classes of your project on demand, and there is no need to write require calls.


Parallel Testing

Testing performance of an application has been extended higher with the help of Parallel testing. Each testing processes in its own thread - it is emulated in the CPU monitor. To parallelize the process of your tests, add this to your test.rb:


parallelize(workers: 2)


Willingly, you can replace the previously used commands for running the tests. For example, bin/rails test OR bin/rspec spec can now be replaced by PARALLEL_WORKERS=15 rails test OR PARALLEL_WORKERS=15 rspec spec.


Benefits of Ruby on Rails:


Each "Gem" has its name, version, and platform. A Gem is nothing but a software package consisting of Ruby application or library. It can also modify the functionality in Ruby apps. All the Gems are available at RubyGems.



Ruby provides convenience for the developers to separate the layers of an application and use multiple technologies. Flexibility is one of the tremendous benefits of Ruby on Rails.



The open-source code of Rails is available within its community, which makes the building functionality even much faster. Ruby on Rails supports most of the free web servers and database and also runs on a free OS. All these features relate to less development time at a lower cost.



With the help of a variety of tools offered by Ruby, it becomes easy for the developers to complete the project in less time. For E.g., Ruby provides in-built templates for common solutions and functions.


Quality of Code

Ruby programming language has a higher level of readability; Which ultimately reduces the demand of writing separate documentation and increases productivity. By this, other developers can easily pick up the existing projects.



Ruby on Rails is an excellent framework for developing both small and large applications but what pulls Rails back is that it adopts more resources and memory than other frameworks and sometimes the performance can also be a bit lethargic. However, I hope the team of ROR developers and their community resolve some sophisticated bugs based on performance; And should also add some advanced features which use fewer resources and provides more output.