Ruby On Rails Crash Course 2020

A beginner food log project to start learning the Ruby on Rails framework

  • 00:00 – Intro
  • 01:09 – What we’ll be building
  • 06:31 – Creating the new Ruby on Rails application
  • 14:24 – Creating the first model and scaffold
  • 19:16 – A tour of the first scaffold and application structure
  • 33:34 – Adding the Bulma CSS framework
  • 39:27 – Adding the primary application header
  • 45:07 – Enhancing the UI with Bulma
  • 01:14:31 – Adding a new controller for displaying all food logs
  • 01:28:19 – Active Record Validations
  • 01:31:07 – Using Rails console
  • 01:32:34 – Testing in Ruby on Rails
  • 01:33:06 – Fixtures
  • 01:34:21 – Controller tests
  • 01:38:14 – Model tests
  • 01:42:26 – System tests
  • 01:50:20 – Active Record Relations – Adding a Category relationship
  • 02:03:10 – Wrapping up

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Ruby On Rails Crash Course 2020

Ruby on Rails Development Services | Ruby on Rails Development

Ruby on Rails is a development tool that offers Web & Mobile App Developers a structure for all the codes they write resulting in time-saving with all the common repetitive tasks during the development stage.

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Shardul Bhatt

Shardul Bhatt


Why should we use Ruby on Rails for Software Development?

What is Rails, Ruby on Rails?

Rails is a server-side web application development framework written in the Ruby programming language. Its emergence in 2005 has influenced and impacted web application development to a vast range, including but not limited to seamless database tables, migrations, and scaffolding of views. In the simplest understanding, Rails is a highly productive and intuitive software developer. 

Websites and applications of any complexity can be achieved with Ruby on Rails. The software is designed to perceive the needs of ruby on rails developers and encourage them with the best way out. It is designed to allow developers to write lesser code while spiking productivity much more than any other framework or language. Ruby on Rails rapid application development offers everyday web development tasks easier and uniquely out-of-the-box, both with the same effectiveness.

The Ruby on Rails framework is based on two philosophies:


  • Don’t Repeat Yourself (DRY): It is a software development principle that ensures that every piece or entity of knowledge must be assigned with a single and unambiguous representation within a development system.

    It not only reduces the need to write lengthy codes but also eliminates the repetitive writing of codes. As a result, it provides a much more manageable web app development with the least possible bugs.


  • Convention over Configuration (CoC): It indicates the highly opinionated feature that the Ruby on Rails framework possesses. It offers ready-made solutions or the “best way out” for many tasks in a web application and defaults them to the convention without the need for external specification. The programmer using the software is required to specify only the unconventional aspects of the web application. 

Some of the commonly known websites built by the Ruby on Rails software developers are Instacart, Scribd, Shopify, Github, ConvertKit, Soundcloud, GoodReads, Airbnb. It finds its application in Sa-as Solutions, Social Networking Platforms, Dating websites, Stock Exchange Platforms, etc.  

Read more: Why Ruby on Rails is Perfect for eCommerce Web Development

Why use Ruby on Rails: The multifold benefits

  • Community and its abundant resources 

    • There is a large community that is dedicated to Ruby on Rails that keeps it up-to-date and indeed encourages its family of developers to continue using it. They make sure the benefits are soaring with every update they make. 

    • The community is committed to developing several ready-to-use code packages, commonly known as gems, for its users. They discuss and announce new project launches, help each other with queries, and engage in framework discussions and betterment. While Ruby on Rails helps developers in rapid application development, it also connects and grows businesses together.

  • Project Scalability

    • To talk about scalability, we indicate the ability to grow and manage more and more user requests per minute (RPM). However, this depends on the architecture rather than the framework. The right architecture of Ruby on Rails web application development allows it to write bulky codes and programs as compared to early-stage difficulties with scalability. 

    • It uses the Representational State Transfer (REST) architecture. This will enable Rails to create efficient web applications based on Rails 6, launched last year in 2020, which addresses most scalability issues. The portable components are agile and help in a better understanding of new requirements and needful adaptations for any business. The framework and architecture allow both vertical and horizontal scalability.

  • Fast Application Development and Cost Effectiveness

    • Ruby on Rails is lucid, logical, and has lean code requirements, thereby cutting down redundancy and improving the overall development speed. Lesser amount of code is proportional to lesser time investment with optimal results. The more time it takes for development, the more expensive it becomes for the end customers.

    • Considering the ready-made code modules/packages (gems) available, Ruby on Rails development company will less time and money are spent creating and modifying Rails websites and applications. Another advantage that has made Ruby on Rails super attractive for startups is its use of Model-View-Controller (MVC) architecture. It has a component separation scheme that speeds up the web development process and fixes any errors that occur.  

  • Data Protection

    • Rails framework and the Ruby on Rails community put in a lot of efforts for data protection and security of its customer base. It is also one of the efficient frameworks for developing database-backed applications. 

    • The developers at Ruby on Rails cover many aspects of cybersecurity, including encryptions of  passwords, credit card information, and users’ personal database. Special measures are taken to prevent the framework from SQL injections and XSS attacks. 

  • Ruby on Rails Enterprise Application Development

    • Ruby on Rails simplifies the daily operations and lowers the cost of enterprise app developments. The prominent features include data management, seamless updating of applications, easy and efficient code development, and high scalability, as discussed above. 

    • Ruby on Rails enterprise application development is preferred by companies and is slightly cost-intensive. It can be easily integrated with third-party apps like Oracle Business, Oracle, Windows services, and others. Ruby enterprise app development allows the developers and programmers to solve the problems at the root level, given its transparency.

Ruby on Rails V/S Django

Checkout Blog on Django vs Ruby on Rails Comparison

Bottom Line

There are several reasons to prefer Ruby on Rails discussed above and extend further to early detection of errors, reduced time to market, and easy adaptation for API developments. It makes web programming much easier and simplifies website building of any complexity. Its flexibility and acceptance among new developers and programmers make it the perfect, one-stop choice for software application development company in 2021. 


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Emily Johnson


How You Can Reduce Ruby on Rails Maintenance Cost?

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sneha cynix


Ruby on Rails Performance Tuning

For something that is touted as being an “easy” to use framework, Rails is a pretty complex beast. Over the years it has progressed from a seemingly simple framework that “anyone” can learn to the intricate collection of add-ons, gems and extensions that make it the power house it is now. ruby on rails training will helps you to learn more skills and techniques.

Optimization is an overlooked aspect of Rails development that often isn’t covered in the tutorials you find online. With the sheer simplicity of snapping in a few gems, throwing together some quick Active Record queries, pushing to Heroku and forgetting about the rest, it’s all too easy to find your application running slow and sluggish, before long you need to backtrack and try to figure out what exactly you did that caused the slow down.

Writing better, leaner code is often the answer, although this article isn’t a coding guide, instead I’m going to list a few simple things you can do to get better performance from your application. These might not be applicable for everyone, but merely some tricks that iv learned that have helped me squeeze a bit more performance out of some recent projects of mine.

Use Unicorn As Your Default Rails Server
This one is a pretty common one, but something I see new Heroku users missing out on a lot. Rails by default uses the “Webrick” server to run Rails, common practice was to often change this it use “Thin” instead.

The problem here is that both these servers don’t handle concurrent connections very well, not ideal for a production web server. There are ways to optimize this, but it’s just better and easier to switch to Unicorn.

Unicorn is a multi threaded web server and allows for multiple “workers” which effectively double and triple the amount of connections you can accept at a time by forking processes.

As an example, setting 5 worker processes allows for 5 concurrent connections. In a Heroku app, every time you scale a dyno, your increasing your maximum concurrent connections by 5.

4 x Dynos with Unicorn configured for 5 workers = 20 concurrent connections

You’ll read over the web that there’s configuration involved with unicorn, but really, it’s not much for a basic setup.

Example on my Heroku / Rails app, I used the default Unicorn config and followed instructions found here Adding Concurrency to Rails Apps with Unicorn , changing only 2 or 3 parameters, then I was up and running with Unicorn. About 10 minutes in total. Obviously do some quick Googling to see what works and is appropriate for your app.

With regards to how many workers you can run, that will depend on how heavy your application is and how much free memory you have remaining. ruby on rails certification training along with real time projects.

Heroku have made some suggestions about tuning your database connection limit in relation to your Unicorn workers here: Heroku Database | Calculating Required Connections

Host Your Assets Externally
By now you’ve switched to Unicorn, and you’re feeling great that you can service more concurrent requests then before, except that when we think about page loads, one end user doesn’t translate to one request.

The problem is your page is loaded with resources such as JavaScript, CSS, images, favicon, fonts etc.

When a user hits your page and retrieves all these assets, they come down as multiple requests.

Those 5 unicorn workers are starting to lose their shine when you have 30 or 40 assets coming down the line per page load.

But wait, there’s more …

All browsers will have a HTTP request limit, which effectively queues HTTP requests to prevent people from opening too many connections per request. The amount of concurrent connections allowed per browser, per domain is typically 2 (The Two HTTP Connection Limit Issue).

When you consider a page loaded with images, CSS, JavaScript etc. It’s not hard to do the math here.

So, what’s the solution?

You’ve heard about compressing JavaScript and CSS then combining into a single file to reduce the HTTP requests per page right? Well what if you could offload some of those HTTP requests to another domain?

By simply introducing another domain into your page request, you’re offloading some of the request queue to another resource.

Automatic Remote Asset Hosting
Alright, so you want to use S3, but you don’t really like the thought of having to manually move files to S3 every time you add new images to your site. No problems, there’s a gem for that called:

Asset Sync works by pushing your static files to Amazon S3 automatically on asset pre-compilation when deploying your app. This happens automatically after a push if you’re using Heroku, otherwise you just need to run

Page Caching
When a page is cached, it’s stored in the /public folder as plain old static HTML. This gets served up by the web server much faster than normal as the HTML page can be served directly without needing to go through Rails at all.

Take for example, a standard home page for a business’s website. The home page may consist of several partials, a bunch of Rails helper methods for images, links and some precompiled CSS and JS.

A normal request will filter through the router first then to the controller, further onto the action then serve up the view.

The view of course then needs to render the various partials (which may also contain more Ruby/Rails items to process) and then switch out all the Rails helper tags for regular HTML.

This all happens pretty fast, but you need to think about how the performance of all this compounds when you add more functionality.

A cached page is served up as a single HTML file without having to bounce through the Rails stack, so none of this pre-processing needs to happen. Your web server dishes up the page as fast as it can retrieve it from the file system (which is pretty damn fast).

A cached page is also resilient to server errors as there is no back end processing required to serve it up. This is why by default, your 500 and 404 error pages are plain HTML pages in the /public folder. ruby on rails online training for more skills and techniques.

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