Is it bad to have meaningless keys in my domain model classes?

Question

When creating domain model, we almost always have Id field or property for our entities which represents the primary key column of corresponding table in the database. My question is - if I have this key property that has nothing to do with the domain model (in other words, it's just database concern; Martin Fowler prefers to name it meaningless key), is persistence layer leaking into my domain? And if it is, how do I prevent it?

Answer 1

Look at the problem another way: Will hiding the Primary Keys make it easier for your team to develop the solution, or make it even harder?

Don't worry about PK values 'leaking' into your entities - I'm sure your software has bigger problems that need to be solved.