Improving repositories with the query object pattern

We need a provision to explain the necessity of a query object pattern, so let's create such a requirement and then we will look into query objects. We will create a repository for blogs in our system, we will see the advantages and disadvantages it brings to the application, and finally, we will see what are query objects and how they help us in improvising repositories.

Introduction to repositories

We have been performing CRUD operations in the controller directly with the data context; we could incorporate a repository in our application first, and later, query objects could be implemented in the repository.

Let us start with creating the interface required for the...