Ultimate ASP.NET 5 Web API Development Guide - Refactor Controller to Use Repository

The video tutorial covers the implementation of the repository pattern to abstract the database context from the controller. It guides viewers through refactoring a controller to use repositories, making methods asynchronous, and handling specific repository logic for detailed operations. The tutorial concludes with testing the refactored code to ensure functionality remains consistent.

What is the primary purpose of using a repository in the context of a controller?

• To directly access the database

• To make the controller dependent on the database

• To create an abstraction layer between the controller and the database context

• To increase the number of lines of code

What is the benefit of abstracting database queries in the controller?

• It requires more code in the controller

• It increases the complexity of the controller

• It reduces the controller's dependency on specific database queries

• It makes the controller aware of all database operations

What method is used to retrieve all countries asynchronously in the refactored controller?

• GetAllAsync

• RetrieveAll

• FetchAll

• GetAll

What does the GetAllAsync method return in the refactored controller?

• A list of strings

• A task list of countries

• A single country object

• A boolean value

How does the repository simplify the PUT operation in the controller?

• By increasing the number of lines of code

• By removing the need for mapping

• By eliminating the need to save changes

• By providing a method to update and save changes in one call

How does the repository handle null values in the PUT operation?

• It ignores null values

• It checks for null and handles it appropriately

• It converts null to a default value

• It throws an exception

What is the advantage of using the DeleteAsync method in the repository?

• It does not handle errors

• It requires more parameters

• It simplifies the code by combining delete and save operations

• It makes the code more complex

What is the role of the Exists method in the DELETE operation?

• To update a record

• To retrieve all records

• To check if a record exists before deleting

• To add a new record

Why can't the generic GetAsync method be used for retrieving country details?

• It requires additional parameters

• It is too slow

• It does not include related data like hotels

• It does not support asynchronous operations

What is the significance of the GetDetails method in the repository?

• It retrieves only the country name

• It updates a country's details

• It deletes a country

• It includes related data like hotels