shopping cart

db/migrate/20210322002803_create_books_users.rb

@@ -0,0 +1,10 @@
+class CreateBooksUsers < ActiveRecord::Migration[6.1]
+  def change
+    create_table :books_users do |t|
+      t.belongs_to :book
+      t.belongs_to :user
+
+      t.timestamps
+    end
+  end
+end