Re: Avoid injecting Service/Repository in an Entity

From my (limited) understanding, you'd have to implement that kind of logic
on a command that knows all the relevant services/repositories.


On Tue, Mar 25, 2014 at 7:23 AM, <[email protected]> wrote:

>
>
> Hi Everyone,
>
> From what I've read, this is really bad. But I have the following use case
> so wondering how to do this in the proper DDD way. The business rule is
> contrived but it is very similar to what i have in real life. I just cannot
> disclose the use case due to NDAs.
>
> I have a class named Class. A class can have students in it. There is a
> business rule such that if a student with the same surname belongs to any
> current of any other class, they cannot be added to the class.
>
> So on Class, i have a method named AddStudent. Just wondering how would
> the algorithm be implemented in a proper DDD sense
>
> public class Class
> {
>
> public void AddStudent(Student student)
> {
>
> // Call a repository to get all the students enrolled in all classes
> // If any students surname matches the surname of the student passed in,
> do not thing
> // otherwise add the student
>
> }
>
> }
>
>
>
>
>  
>