Business Component RemoveByKey method

Removes 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 RemoveByKey method can be used to remove the desired "line" by specifying the second level identifier.

Samples

Suppose you define the following two-level Transaction as a Business Component (by setting its Business Component property = True):

Attraction
{
   AttractionId*
   AttractionName
   CategoryId
   CategoryName
   CountryId
   CountryName
   CityId
   CityName

   Ticket
   {
      AttractionTicketId*
      AttractionTicketDescription
      AttractionTicketPrice
   }
}

If you need to delete for the AttractionId = 6 the line whose AttractionTicketId=3, you can do so by defining this code for example in the Source of a Procedure or in the Events of an object:

&Attraction.Load(6)
&Success = &Attraction.Ticket.RemoveByKey(3)    //&Success: Boolean
&Attraction.Save()
If &Attraction.Success()
   commit
else
   rollback
endif

Variables:

&Attraction: based on BC Attraction. 
&AttractionTicket: based on BC  Attraction.Ticket.

Availability

This method is available since GeneXus 15.

For Apple is available since GeneXus 15 Upgrade 2.