Gets a record that corresponds to a "line" of a variable based on a Business Component type of a two-level Transaction object by specifying its key.
First, all the structure must be loaded in memory by using the Load method, and after that, the method can be used to get the desired "line" by specifying the second level identifier.
If this method doesn't find a line with the required key, it returns a new, empty Business Component instance.
Suppose you define the following two-level Transaction as a Business Component (by setting its Business Component property = True):
If you need to update for the AttractionId = 6 its AttractionTicketId=3 with a different price, you can do so by defining this code for example in the Source of a Procedure or in the Events of an object:
&AttractionTicket = &Attraction.Ticket.GetByKey(3)
if not &AttractionTicket.IsEmpty()
&AttractionTicket.AttractionTicketPrice = 100
&Attraction: based on BC Attraction.
&AttractionTicket: based on BC Attraction.Ticket.
This method is available since GeneXus 15.
Apple is available since GeneXus 15 Upgrade 2.
Note: This method also applies to a collection of "headers". That is to say, it applies to a collection of Business Components in order to get a header.