Agile Web Development with Rails 8

Pulling It All Together

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

class CreateProducts < ActiveRecord::Migration[8.0]
  def change
    create_table :products do |t|
      t.string :title
      t.text :description
      t.decimal :price, precision: 8, scale: 2

      t.timestamps
    end
  end
end

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, description, and price, as well as a ...