One blank line in list item

Question

Hi there. I try to write a code to fill my list item in oracle form builder.

I do it by write a function to handle this.

list_index number(10) := 1;

clear_list(list_item1);
FOR I IN (Select id,desc FORM table1)
LOOP
  ADD_LIST_ELEMENT('list_item1',list_index,desc,id);
  list_index := list_index + 1;
END LOOP

list_item1 := get_list_element_value('list_item1',1);

my result in output is like this:

x1
x2
x3
x4
<a blank field>

but in my database table I just have

x1
x2
x3
x4

would you help me please to how find what's my problem that I have one more space in my list item.

Answer 1

Forms maintains an additional NULL element in a list item. From the on-line help:

List Items and Null Values ... Setting the Required property for a poplist or TList may affect the values the list will display: When selected, an instance of a poplist will display an extra null value if its current value is Null or if its effective Required property is false.

CLEAR_LIST Built-in Clears all elements from a list item. After Oracle Forms clears the list, the list will contain only one element (the null element), regardless of the item's Required property.