📚 Main Topics

1. Introduction to CRUD Operations

   • Overview of the existing functionality: fetching products, adding new products.
   • Explanation of the need for update and delete operations.

2. Setting Up the Environment

   • Ensuring the server is running on port 8090.
   • Using Postman to send requests and test the API.

3. Implementing Update Functionality

   • Changing the request type to PUT for updating product details.
   • Creating a method in the controller to handle PUT requests.
   • Using @RequestBody to accept the updated product data.
   • Manually updating the product list since data is not stored in a database.

4. Debugging Update Issues

   • Identifying and fixing issues related to unsupported media types.
   • Successfully updating a product's details and verifying the changes.

5. Implementing Delete Functionality

   • Sending DELETE requests to remove products by ID.
   • Creating a method in the controller to handle DELETE requests.
   • Using @PathVariable to accept the product ID for deletion.
   • Manually finding the index of the product to delete from the list.

6. Testing CRUD Operations

   • Verifying the successful execution of GET, POST, PUT, and DELETE requests using Postman.
   • Observing the changes in the product list after each operation.

✨ Key Takeaways

• CRUD OperationsUnderstanding how to implement Create, Read, Update, and Delete operations in a Spring Boot application.
• HTTP MethodsFamiliarity with different HTTP methods (GET, POST, PUT, DELETE) and their usage in RESTful APIs.
• DebuggingImportance of debugging and testing API endpoints using tools like Postman.
• Manual Data ManagementRecognizing the limitations of hardcoded data and the need for a database in real-world applications.

🧠 Lessons Learned

• Code StructureThe importance of structuring code properly and avoiding repetition (DRY principle).
• Error HandlingUnderstanding potential pitfalls in API development, such as unsupported media types and method not allowed errors.
• Future ImprovementsThe potential for using Spring Data JPA to simplify data management and improve code efficiency in future implementations.