DDD: Where to create entity objects?

Question

I have three objects that must interact: User, SupportTicketand PhoneConversation. When someone calls for help, the User must have a SupportTicket assigned to him and PhoneConversation assigned to Ticked describing the call.

My question is: In which entity should I put the method CreatePhoneSupportTicket()that creates the new SupportTicket and PhoneConversation, connect them to each other, and finally connect the SupportTicket to the user?

I assume this cannot be on the user, because it violates SRP (the user does a few more things). But the method itself does more than one, it should create both SupportTicket and PhoneConversation. Is this a situation where a service is the best solution and then sets methods for entities? Thank you for your help!

Answer 1

, . SupportTicket, new SupportTicket(currentUser) . , , CreateSupportTicket() new SupportTicket() . SupportTicket, , new PhoneConversation(). - factory, . , .

Answer 2

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Answer 3

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Answer 4

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Ticket t = user.GetOpenTicket();
t.AddCall(currentCall);

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Answer 5

It's hard to say without deep knowledge of your domain, but it would be wise to have aSupportTicketRepository.CreatePhoneSupportTicket(aUser, aPhoneConversation)