Building Microservices API in Go - Error Handling Part 1

This video tutorial extends the previous session by adding business complexity to the project. It focuses on building an API to fetch a customer by ID, ensuring the URL accepts only numeric IDs and returns a JSON object. The video covers implementing a method in the repository interface, its DB adapter, and handling errors like 404 and server errors. The tutorial is divided into two parts, with the first part addressing the initial requirements and the second part focusing on error handling. The video concludes with testing the application and verifying the requirements.

What is the primary goal of the API being developed in this video?

• To update customer information

• To delete a customer by ID

• To fetch a customer by ID

• To list all customers

What is the purpose of the 'by ID' method in the repository interface?

• To list all customers

• To delete a customer by ID

• To retrieve a customer by ID

• To update customer details

Why does the 'by ID' method return a pointer?

• To allow for multiple return values

• To handle large data efficiently

• To return nil if no customer is found

• To improve performance

What is the role of the primary port in the service layer?

• To connect the database to the application

• To handle HTTP requests

• To connect the primary port with the secondary port

• To manage user authentication

How are routes defined in the application?

• Using a configuration file

• Through a web interface

• Directly in the database

• In the app.go file

What happens if a non-numeric ID is provided in the URL?

• The request is ignored

• The server crashes

• A 404 error is returned

• The request is processed normally

What HTTP status code is returned when a customer ID is not found?

• 403

• 500

• 200

• 404

What is the expected output format for a successful API call?

• JSON

• HTML

• Plain text

• XML

What tool is used to ensure that only numeric IDs are accepted in the URL?

• A database constraint

• A regular expression

• A custom validation function

• A third-party library

What is the next step after testing the application in this video?

• Implementing error handling

• Refactoring the code

• Adding more features

• Deploying the application