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Agile Web Development Using Rails 6

Pulling It All Together

Learn how Rails 6 leverages Ruby's features to create database migrations that define tables and fields declaratively. Understand class inheritance, method definitions, and Ruby idioms as used in Rails migration code to simplify and clarify application development.

We'll cover the following...

Demonstration of ruby and rails features

Let’s look at an example of how Rails applies a number of Ruby features together to make the code we need to maintain more declarative. For now, we’ll focus on the Ruby-language aspects of the example:

Ruby
class CreateProducts < ActiveRecord::Migration[6.0] 
  def change
    create_table :products do |t|
      t.string :title
      t.text :description
      t.string :image_url
      t.decimal :price, precision: 8, scale: 2
      t.timestamps 
    end
  end
end

Note: Even if you didn’t know any Ruby, you’d probably be able to decipher that this code creates a table named “products”. The fields defined when this table is created include title, ...