What is an "Anemic Domain Model"?

An Anemic Domain Model is an antipattern in which domain objects hold only data, but no behavior.

Signs:

1. Entities are just sets of fields with getters and setters.
2. All business logic is pushed into services or controllers.
3. The Encapsulation principle is broken: data is "naked," and behavior is smeared around.

Example:

Problem: the code loses its connection to business meaning, rules get duplicated, and testing is hard. DDD solution: bring behavior back into the domain, so objects don't just describe data, but act as participants in the business process.