Association Has-A Question

[bantl]

I'm new to UML and EA.  When I'm creating two classes I want to show an 'association' (has-a) between them for example:

Car -- (1) ---------- (1) --> Steering Wheel

I'm having trouble determining the proper way to implement the class diagram.

If I add a Steering Wheel attribute to the Car class and an association between the Car and Steering Wheel class I get two references in the Car class when the code is generated.

I believe I'm suppose to have a Steering Wheel attribute in the Car class but then I can't have the association because code generation is improper.

If I get rid of the attribute the code generates properly but its no longer an attribute.

If I get rid of the association the code generates properly but I no longer see the association.

What is the correct way to show this 'has-a' relationship in EA so the diagram is offical UML and the code generates properly.

Thanks to anyone for there help.

[Molto Mike]

AFAIK, it is UML compliant to show an attribute *either* through an association *or* as an explicitly in the attribute compartment.

Mike

[Ilia]

Try to set Steering Wheel Role Name = attribute name.

[Duc-bert]

use [strong] aggregation to represent the "has-a".
you can use "target role" with the association so the code gen knows to create only one.
enjoy