Hi, Can someone help me understand something?
I’m trying to model a one-to-one relationship between two entities but I can’t seem to get the relationship to be optional. In my specific case I need to model an entity representing shipments with a postal service. Each shipment needs to have a number taken from a range/group that is pre-assigned by the postal service. Thus I created a SHIPMENT_NUMBER entity with just an INTEGER attribute and then used that attribute to build the relationship with the SHIPMENT entity. Possibly with “To dep PK” as well. I want the relationship to be optional so that I can generate SHIPMENT_NUMBER as many as I want and populate them with the numbers assigned by the postal service and only later, when the real SHIPMENT is actually needed/created, link it with the number in a one-to-one fashion. I’m not sure why, but my class generated content always shows the relationship as mandatory. Coming from the WebObjects world, I'm used to a modeler that explicitly shows checkboxes for isMandatory on relationships like with the attributes. Here in Cayenne it seems that optionality is implicitly determined based on the design. Have I misunderstood something? Is my design flawed? Any tip is appreciated. Regards, Riccardo
