Implement Carts and Shopping Lists

After completing this learning path, you will be able to:

• Explain the data models, lifecycles, and architectural scope for both Carts and Shopping Lists.
• Learn to create, query, and update Carts and Shopping Lists for both anonymous and registered customers, correctly handling product line items, custom text items, and user associations.
• Build complex functionalities like automatically merging an anonymous Cart upon login and creating publicly shareable gift registries or wishlists using Custom Fields.
• Apply optimistic concurrency control, handle common API errors, and implement critical security checks to validate that a user can only access and modify their own resources.