E.g. in a domain model with two aggregate roots:
- book
- author
Is there a specific term that refers to a collection of aggregates of the same root type (e.g. a collection of books)?
In Confusion about the meaning of the word aggregate in domain driven design I read the term aggregate type, which might or might not fit, but I haven't found a direct mention in Evan's blue book.
-
2AFAICT, it's simply a collection of aggregates. Martin Fowler states an invoice as an example of an aggregate, so a bunch of them would simply be a collection of invoices.Robert Harvey– Robert Harvey01/08/2016 15:43:29Commented Jan 8, 2016 at 15:43
-
Is BoundedContext what you're looking for? martinfowler.com/bliki/BoundedContext.htmlprogrammer– programmer01/08/2016 16:41:19Commented Jan 8, 2016 at 16:41
-
@RobertHarvey Thanks for your reply. Would you agree with VoiceOfUnreason that this is because the term aggregate is solely used to describe the concept of a transactional unit and thus there is no need to have a specific term for a collection of those (compared e.g. to table/row in a database context)?sthzg– sthzg01/09/2016 12:54:06Commented Jan 9, 2016 at 12:54
-
@Jason Bounded Contexts are not really what I was after. With the distance of one day I realized that my question wasn't all that precise because I was really looking for something different. :) But that's a bit too far away from my original question so I leave that as it is and may be opening a follow up sometime. Nevertheless I find the question as is also interesting, namely if there was a specific term for a collection of aggregates of the same root type (seems there is none according to the answers).sthzg– sthzg01/09/2016 13:00:59Commented Jan 9, 2016 at 13:00
-
Table/Row is also a collection. It just happens to be a collection in a database, and table/row are convenient terms for something that has that particular shape.Robert Harvey– Robert Harvey01/09/2016 15:06:48Commented Jan 9, 2016 at 15:06
1 Answer 1
Is there a specific term that refers to a collection of aggregates (e.g. books or authors)?
No.
Keep in mind that the definition of aggregate is
A cluster of associated objects that are treated as a unit for the purpose of data changes. External references are restricted to one member of the aggregate, designated as the root. A set of consistency rules applies within the aggregate's boundaries.
A union of two different transactional units is... not very interesting.
Explore related questions
See similar questions with these tags.