Creating child records in a 1 to 0..1 relationship

Question

I have been looking over forums and documentation, but I still can't seem to get it to work.

I have a entity called "Party." It has multiple 1 to 0..1 relationships, such as "Carrier", "Producer", "Brokerage", "Insured", "Beneficiary". The reason why is that a "Party" can be multiple things. I can be a producer, an insured, and a beneficiary all at once. Or I can just be an insured. The Party table grabs general information on a party and each of the 0..1 relationships further define that party. 

Anyways...

I want to be able to create a party, and then create any child records associated with it. Maybe just a carrier. Maybe a insured and a beneficiary.

I get the use of a button to create the dependent record. But for some reason, it is just not working.

partialvoidAddCarrier_Execute()

{

this.PartyProperty.Carrier = newCarrier();

this.FindControl("Group1").IsVisible = true;

}

But when I do it, I get a validation error. The party in the carrier is not defined as anything. What am I doing wrong?

Much thanks for your help in advance.

Answer 1

You are trying to create it on the navigation property.  Create it first on the data source or on the visual collection then assign to the navigation property.

partialvoidAddCarrier_Execute()
{

//Create the new Carrier entity on the datasource
 Carrier newCarrier = this.DataWorkSpace.YourDataSource.Carriers.AddNew();

//Or, create it on the visual collection if it is part of the screen view model

Carrier newCarrier = this.Carriers.AddNew(); //Either way will work

//Initialize other properties if you want
 newCarrier.SomeOtherProperty = "Something";

//Assign to the navigation property
 this.PartyProperty.Carrier = newCarrier;

//Do stuff to controls
 this.FindControl("Group1").IsVisible = true;

}

Answer 2

Thanks. My brain is not working today. I have literally done the exact thing multiple other times.