Model in Ruby on Rails

Lets see how to create a model on Ruby on Rails

I want to create Product and Category models. Product model has a reference to Category model

So I first create the model Category

rails g model category category_name

Your migrated file @db\migrate location

class CreateCategories < ActiveRecord::Migration[6.0]
  def change
    create_table :categories do |t|
      t.string :category_name

      t.timestamps
    end
  end
end

and then run the migrate

rake db:migrate

Second I will create the Product

rails g model product product_name sku category:references

You can see the migrated file

class CreateProducts < ActiveRecord::Migration[6.0]
  def change
    create_table :products do |t|
      t.string :product_name
      t.string :sku
      t.references :categories, null: false, foreign_key: true

      t.timestamps
    end
  end
end

and then run the migrate

rake db:migrate

/usr/local/Cellar/ruby/2.6.5/bin/ruby /Users/Niro/RubymineProjects/untitled/bin/rails g model product product_name sku album:references

/usr/local/Cellar/ruby/2.6.5/bin/ruby /Users/Niro/RubymineProjects/untitled/bin/rails

Rails model generator saves time

List of available types
integer
primary_key
decimal
float
boolean
binary
string
text
date
time
datetime
timestamp