Display Methods

Hossein.K

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Display methods are used on forms. They are commonly created on the table, and
can also be defined on the form. Display methods return a value that is displayed
on the form or report. They are often used to display a calculation, or to look up a
single field from another table. The following example shows how to display the
item name on a form that displays data from a table containing the item id.

1:  // BP Deviation documented  
2:  display itemName itemName()  
3:  {  
4:  inventTable inventTable  
5:  select name from inventTable  
6:  where inventTable.itemId == this.itemId;  
7:  return inventTable.name;  
8:  }

The first line in this code is a comment to the compiler indicating that a Best
Practice deviation is considered and evaluated as reasonable. The deviation is
because a display method is able to return any data from any table or field in the
system, and so the security implications should be considered.

Best Regards,
Hossein Karimi