Entity Pattern
The Entity Pattern is a software design pattern used in domain-driven design (DDD) to represent domain objects with a distinct identity that persists over time, regardless of changes to their attributes. It focuses on modeling real-world entities that have a lifecycle and are uniquely identifiable, often through an ID or key. This pattern helps in organizing business logic around core domain concepts, ensuring data integrity and consistency in applications.
Developers should learn and use the Entity Pattern when building complex business applications where domain objects need to be tracked and managed over their lifecycle, such as in e-commerce systems (e.g., orders, customers) or enterprise software (e.g., employees, invoices). It is essential in DDD to separate entities from value objects, as entities require identity-based equality and can change state, making them crucial for handling business rules and persistence in databases.