Questions tagged [value-object]
The value-object tag has no summary.
50 questions
0
votes
2
answers
128
views
Modeling value object when fields' existence depends on state of other fields
I am practicing tactical DDD and having trouble as exemplified below. Fundamentally, whether some fields of the value object should be nullable depends on another field of the same value object. ...
- 71
1
vote
3
answers
225
views
DDD: big immutable item with some references to entity identifiers, should it be value object or entity?
Let's say I have a Mail, this mail have many properties given by the constructor (for example, 10-15 parameters).
This mail can't be edited (immutable), the user has specifically requested to send ...
- 119
0
votes
2
answers
1k
views
Should Value Objects be used inside the DTO?
After reading about Value Objects, I think they're pretty cool and should be used, but I am not sure if I am doing it the right way.
Let's assume that I have a simple DTO to create a user, which ...
- 81
0
votes
1
answer
432
views
In DDD, must a Value Object turn into an Entity when some limited idenifiablity is required?
I have an Entity type, let's say Car for example. There is a Value Object type Tire for it. Each car has a set of tires with certain properties. Sometimes tires are replaced, which is communicated by ...
- 109
0
votes
1
answer
844
views
Unit testing parts that use a Value Object that is being created by a Factory
Here is the conundrum,
I have a fairly complex Value Object and I don't want to expose it's internals. It should not be an Entity since there is no need for attaching an identity to it. According to ...
- 3
0
votes
1
answer
194
views
A table contains forbidden words which you cannot use in a comment - is it a value object in DDD? [duplicate]
My aggregate root is "Post" and sub aggregate is "Comment". In my database I have a table called "ForbiddenWords" with one column "Name" (it contains words for ...
- 21
2
votes
1
answer
1k
views
Static validator in DDD value objects
I have a value object to hold a user id number as a string. This number has a unique format throughout my domain. So, it's being validated inside the object during instantiation and an exception is ...
- 131
0
votes
0
answers
87
views
DDD Value Objects: when is enough enough? [duplicate]
Where do you like to draw the line for modeling a single value as a Value Object v.s. a primitive? For example if I have an internal order number and a customer order number, would you model them both ...
- 247
0
votes
3
answers
2k
views
ValueObjects exposing outside domain layer
As I learned from the DDD rules, you have to change the entity through the aggregate root.
However let's say we have a value object "Address".
Is it allowed to do in the AR:
(I've seen this ...
- 223
0
votes
1
answer
771
views
List of ValueObjects a valid thing?
Let's say we have an entity Customer which can have multiple email addresses.
We create a ValueObject "EmailAddress", upon creation it checks if the address is valid.
Is this concept valid ...
- 223
0
votes
2
answers
1k
views
Where should I put the initialization validation of a Value Object?
Hi I am making a Value Object.
public class Age
{
public Age(int age)
{
Value = age
}
public int Value { get; private set; }
}
I want to check ...
- 191
0
votes
1
answer
478
views
Should an entity initialize a value object?
I'm studying DDD at the same time that I'm reading some Khalil Stemmler posts and I'm a little confused about who should initialize the VO: the entity it is related to or the useCase that uses that ...
- 143
0
votes
1
answer
575
views
DDD - Complex value object
I have a Message class that represent some data sent by a smartwatch. A Message has a header (sender, length...) and a type; it can be a location update, an alarm message... There are about thirty ...
- 19
-1
votes
2
answers
677
views
Async Value Object Creation (DDD)
Suppose that I have a Value Object representing an Image URL of a Cake.
To check that it really is a cake, I make an asynchronous API call to a server that checks whether the image really represents ...
- 19
5
votes
4
answers
2k
views
Value/reference type, object and semantics
What are the relationships between these pairs of concepts:
value/reference type;
value/reference object;
value/reference semantics?
For the first pair of concepts, it seems to me that an object of ...
- 612