The application grows up
Applies to: Evolution 3.
How can we represent that a country has a number of cities? By creating a second level in the Country transaction.
We see that GeneXus creates two tables and focus on the primary key of the second table. We also see the grid that is added to the web form for recording cities.
We add the city to the Attraction transaction and specify that it may be left null if its value is not available at runtime.
Read the video script here.