Populating products and categories default data

app/models/category.rb

+class Category < ApplicationRecord
+  has_many :products, dependent: :destroy
+end
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app/models/product.rb

+class Product < ApplicationRecord
+  belongs_to :category
+end
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db/seeds.rb

@@ -5,3 +5,27 @@
 #
 #   movies = Movie.create([{ name: 'Star Wars' }, { name: 'Lord of the Rings' }])
 #   Character.create(name: 'Luke', movie: movies.first)
+
+# Create Product Categories
+5.times do |n|
+  freq = n + 1
+  title = "Category #{freq}"
+  desc = "Description for category #{freq}"
+  Category.create!(title: title, description: desc)
+end
+
+# Create Products
+categories = Category.take(5)
+40.times do |n|
+  freq = n + 1
+  title = "Product #{freq}"
+  desc = "Description for product #{freq}"
+  categories.each do |cat|
+    sku = "u-#{rand(1..999)}"
+    price = (200.0 - 5.0) * rand + 5
+    cat.products.create!(title: title,
+                         description: desc,
+                         sku: sku,
+                         price: price)
+  end
+end
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