Web API Development for the Absolute Beginner by Irina Dominte

Author:Irina Dominte
Language: eng
Format: epub, pdf
ISBN: 9781484293485
Publisher: Apress

Listing 7-5 Migrations Pointing to the Project Entry Point

Now that we have told the command where to find the connection to the database, it will execute successfully and generate our migrations the same way we have seen in the previous chapter and create a Migrations folder in our project (Figure 7-7).

Figure 7-7 Migrations added

Data Layer, Implementing a Repository

The data layer in a web application refers to the component responsible for accessing and manipulating data. It is responsible for communicating with the data storage mechanism, such as a database, and providing a consistent and unified interface for accessing and manipulating the data. The data layer often implements data access patterns, such as the repository pattern, which provides a separation between the data storage mechanism and the rest of the application.

This makes it easier to change the data storage mechanism in the future, as only the data layer needs to be modified, rather than the rest of the application. The data layer can also provide caching, filtering, validation, and other data-related services to the rest of the application.

The data layer is a core component of a well-architected web application, as it is responsible for managing the data and providing a unified interface for accessing and manipulating it.

In our case, EF Core DBSet classes behave like repositories. We could use them as they are, but our goal is to have a minimum separation of concerns. You will have plenty of time to experiment afterward.

In our Conference.Data project we need to add a new file named SpeakersRepository; it is where we will implement CRUD methods. Our class needs to access ConferenceContext to have access to the database. This means we will need to reference the Conference.Domain project.

Right-click the Dependencies node and select the “Add Project reference” option, in the same way we did earlier for Conference.Domain. You will endup having something similar to Figure 7-8.

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