How do I handle errors in Go APIs?

How do I handle errors in Go APIs?

In Go, you typically handle errors by returning an error value from functions. You can check this error value to determine if an operation was successful.

Can you give me an example of error handling in a Go API?

Sure! Here's a simple example:

func GetUser(id string) (*User, error) {
    user, err := db.FindUserByID(id)
    if err != nil {
        return nil, fmt.Errorf("error finding user: %w", err)
    }
    return user, nil
}

What about handling different types of errors?

You can use type assertions to handle different error types. For example:

if err, ok := err.(*MyCustomError); ok {
    // handle MyCustomError
}

Are there best practices for error handling in Go?

Yes, some best practices include:

1. Always check for errors.
2. Use error wrapping to provide context.
3. Define custom error types for specific cases.