The MVC Pattern: Model, View and Controller

The Model-View-Controller or MVC pattern is one of the architectural design patterns used by various programming frameworks, such as Laravel.

The purpose of this pattern is to separate development into three areas:

• First, the model, which refers to the database where each model represents a database table.
• Second, the controller, which includes the specific business logic, for example, adding validation to ensure only users over 18 can register.
• Lastly, the view, responsible for the visual part and the corresponding design.

This separation allows for a more organized code within the system or application, and also facilitates task distribution, particularly when multiple individuals need to work simultaneously on the project.

Furthermore, this separation allows for working with backend specialists on one side and frontend specialists on the other.

Additionally, it’s worth noting that two more layers of abstraction can be added to this separation:

Services:

These are components designed to unify functionalities within controllers, thus eliminating code duplication.

An example of services could be instead of performing age validation both on creation and update, the corresponding service is instantiated where the validation is done in one place.

Repositories:

Repositories include all the query and persistence functions of a database table.

This is beneficial as it centralizes these functionalities in one place, and if any adjustments are needed, they are made in one location.

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