Ruby on Rails a full stack MBC web framework famous for powering some of the most successful internet startups of the last 20 years it was created in 2004 by David hanm Hansen to give developers a way to build largescale web applications quickly with the Ruby programming language it exploded in popularity among the Silicon Valley Tech bro scene and helped launch unicorn startups like Airbnb Shopify and GitHub just to name a few its underlying architecture is based on the model view controller pattern a model contains the business Logic for your database rails has a built-in om
called active record that can easily model relationships in a SQL database on the other end we have the view for presentation logic which includes a mix of HTML CSS and embedded Ruby which displays Dynamic data quered from the back end this data is made available by the controller which sits in the middle it takes the incoming HTTP request from the user it fetches data from the model and finally responds with HTML or Json this pattern actually predates the web itself but rails makes it extremely easy to implement by following a highly opinionated and controversial Doctrine
which includes nine Commandments like convention over configuration and exalt beautiful code let's build a full stack application right now by installing Ruby rails and SQL light now run the rails new command to scaffold out a new project from here you'll notice a gem file to install dependencies in Ruby a rake file which is like a make file in C to run a task but the bulk of your code will be written in the app directory in addition to models views and controllers you'll also notice mailers for transaction actional email jobs for background work and channels
for real-time connections via websockets and we have a JavaScript directory configured with hot wire allowing you to build a highly interactive front end without the unnecessary complexity of a JavaScript component framework rails also has an extremely powerful CLI generate will build your models ussing controllers or do everything all at once with scaffold we give our model a name which is plural by convention then provide some fields and types we might use in the database this command creates a bunch of files but let's go ahead and run rake to migrate the database then rail server to
run it locally congratulations you just built a piece of crud a full stack app that can create read update and delete your database model in the browser how did we do that so fast at first the routes RB file mapped a set of URLs to our controller automagically created by this resources method when a user navigates to one of those routes it triggers a controller action like index will'll fetch all the records from the database by calling the all method which is provided automatically by the model we could also perform data validations here and do
joins with other models now the controller created an instance variable which we can access directly in the html. embedded Ruby file here we have each row in the database as a rubby object which we can Loop over with each to display it in the front end UI this has been rails in 100 seconds but if you really want to learn how to build cool web apps it's far more important to learn how to problem solve like a programmer you can start making that happen for free thanks to this video sponsor brilliant web Frameworks come and
go but problem solving is a skill that you keep forever Brilliance platform will introduce you to essential Pro programming Concepts but most importantly the Hands-On exercises will develop your brain to recognize and solve complex problems that developers need to overcome on a daily basis best of all every lesson is concise and rewarding but by investing just a few minutes each day you'll develop habits that can level up your programming skills for the rest of your life and you can do it anywhere even from your phone to try everything brilliant has to offer for free for
30 days visit brilliant.org fireship or scan this QR code for 20% off their premium annual subscription thanks for watching and I will see you in the next one
