How to properly define an aggregate in DDD? - Stack Overflow
Jul 12, 2018 · After designing aproximatelly 20 DDD projects I am still confused about the rule of thumb when choosing domain objects that would create an aggregate. Martin Fowler uses order and line-items analogy and I don't think it is a good example, because order+line-items are really tightly bounded objects.
design patterns - What's an Aggregate Root? - Stack Overflow
From Evans DDD: An AGGREGATE is a cluster of associated objects that we treat as a unit for the purpose of data changes. Each AGGREGATE has a root and a boundary. The boundary defines what is inside the AGGREGATE. The root is a single, specific ENTITY contained in the AGGREGATE. And:
Difference between an entity and an aggregate in domain driven …
Sep 2, 2015 · An aggregate will often contain mutliple collections, together with simple fields. The term "aggregate" is a common one, and is used in various different contexts (e.g. UML), in which case it does not refer to the same concept as a DDD aggregate. Entity: In a data model context, describes the structure of data regardless of the stored form.
Object reference vs reference by Id in DDD Aggregates
Sep 6, 2015 · In the Pluralsight course Domain-Driven Design Fundamentals, there's an example of how the design of an Aggregate takes shape. The example involves patient Appointments in a clinic. The appointment has relations e.g. to a doctor, or an exam room. And the example is preceded by an analysis concluding that Appointment should not be an aggregate ...
c# - Can aggregate root reference another root? - Stack Overflow
May 30, 2018 · In DDD you can reference an aggregate root from another aggregate. What you cannot do is reference anything inside the other aggregate root. II think that your aggregate roots are probably PurchaseOrder, Supplier and StockItem. Don't get confised between a PurchaseOrderLine and a StockItem. A PurchaseOrderLine belongs to the PurchaseOrder ...
DDD: Handle domain events directly in aggregate?
Apr 28, 2021 · 1. Exactly! Usually commands and events would be grouped under one aggregate id, especially in event sourced scenario (to be able to apply to load current state of the aggregate). You'd need to have a translation layer between 2 aggregates. event<PalletId> -> command<LocationId> -> event<LocationId>. – hgulyan.
DDD: Aggregate Root accessed by another aggregate root
So in your situation, I would first create the File AR and persist it to a File repository. I would then take the newly created File AR and assign it to my user: user.AssignProfilePic (file.ID). Finally save the user to the user repository. You can orchestrate this in either an application service or domain service.
DDD element: Aggregates in c# - Stack Overflow
Jan 7, 2010 · public OrderLine(Item item, int quantity) {. Item = item; Quantity = quantity; } } At no point should logic involving OrderLine s be exposed outside of an instance of Order. That's the point of aggegrate roots. For a .NET specific reference, see Applying Domain-Driven Design and Patterns: With Examples in C# and .NET. Of course, the standard ...
DDD: do I really need to load all objects in an aggregate?
Jun 6, 2016 · Here there is an aggregate consisting of Auction and Bids where the Auction is the Aggregate Root. If we say that Bid is also a separated Aggregate Root you would have have a BidsRepository, and you could easily do: var newBid = new Bid(money); BidsRepository->save(auctionId, newBid);
DDD (Domain-Driven-Design) - large aggregates - Stack Overflow
Apr 19, 2015 · The idea of aggregates is clear to me and I find it very interesting. Now I'm thinking of an example of aggregate like : BankAccount (1) ----> (*) Transaction. BankAccount. BigDecimal calculateTurnover(); BankAccount is an aggregate. To calculate turnover I should traverse all transactions and sum up all amounts.