All 7 MVC Architecture in PHP questions
More in MVC Architecture in PHP
What is the MVC architectural pattern, and how do the Model, View, and Controller components each play a distinct role in a PHP application? What is the role of a Controller in the MVC pattern, and what responsibilities should typically be kept out of a controller to maintain good separation of concerns? How do Views in MVC separate presentation logic from application logic, and what role do templating engines like Blade play in this separation? How does a typical request flow through an MVC based PHP application, from the initial incoming HTTP request to the final rendered response? How does the concept of a Service Layer complement traditional MVC by providing an additional place for complex business logic that spans multiple models? How should a large, complex PHP application evolve its architecture beyond basic MVC to maintain organization and testability as the codebase and team grow significantly?
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How do Models in MVC represent both data structure and business logic, and how does this differ from a Model being purely a simple database representation?

Intermediate

Answer

While a Model often does directly correspond to a database table, particularly when using an Active Record based ORM like Eloquent, a well designed Model in MVC should also encapsulate relevant business logic and rules specific to that data, such as validation rules, computed properties, or domain specific behaviors, rather than being purely a passive container for database columns, ensuring that business rules live consistently in one place rather than being scattered throughout multiple controllers that happen to work with the same data.
class Order extends Model {
    public function isEligibleForRefund(): bool {
        return $this->status === 'delivered' && $this->created_at->diffInDays(now()) <= 30;
    }
}
Real-world example An order refund feature checks a business rule about refund eligibility by calling a dedicated method directly on the Order model itself, ensuring that exact same rule is applied consistently wherever it is needed throughout the application rather than being duplicated across multiple controllers.

Common follow-ups: How do you decide whether specific business logic belongs on the model or in a separate dedicated service class?;What is the difference between a 'fat model' and a 'thin model' approach?

OOP;Design Patterns in PHP
All 7 MVC Architecture in PHP questions