I hope to express myself with appropriate terms.
I have three entities: customer, country, state. Between country and state, there are two relationships. So I can create a number of countries and select one of these I can create a number of states that belong to it.
For creating the interface of the entity "customer" I put three
- The first selects the country,
- The second shows the states related to the selected country.
- The last shows the zip code related to the chosen state.
My problem is that I can not pass data through the chosen
NSPopUpButton entity "customer". The NSPopoUpButton works by binding:
- Content (bind to:country, arrangedObjects),
- Content Values (bind to:country, arrangedObjects, model key:country),
- Selected Index (bind to:country, selectionIndex).
What can I do to ensure that the data selected by the three
NSPopUpButton's are recorded in the appropriate fields of the entity "customer"?