A common problem in Ruby is that you get error messages, which in technical terms we call “exceptions”. These exceptions can be expected, like a file that may be available sometimes but missing in others, or an API that is only available temporarily due to some restrictions, or they can be unexpected. Today you’ll learn … Read more
What is Sequel? Sequel is a gem that allows you to access your database, no Rails required. You can connect to your database in different ways. Mostly two: By sending raw SQL commands By using an ORM Here’s an example, using raw SQL & the MySQL database. require ‘mysql2’ client = Mysql2::Client.new(host: “localhost”) results = … Read more
What is a Ruby method? A method is a set of one or more lines of Ruby code that are grouped together for a specific purpose. The grouped code is given a name for easy reuse without the need for rewriting or copying & pasting the code. The purpose of a method can be to: … Read more
Let’s talk about Rails parameters! Why are they useful? Users can send data to your web application in three different ways. These three ways are: Using a query parameter (“example.com/?q=bacon”) Submitting a form (“/users/sign_in”) Within the URL itself (“/books/1”) How do you access this data from Rails? With params. Inside your controller action’s you can … Read more
How can strings of characters exist in a world where computers only understand ones & zeros? Well… Just like we can map a domain name to an IP address. Or a barcode to a specific product. We can… Map numbers to characters! Like 97 to “a”. Or 122 to “z”. That’s exactly how we can … Read more