How to set value for the Oracle APEX Popup LOV - oracle-apex

Question

I'm looking for a way to set a value in Popup Lov item. I'm using Oracle Apex and I'm trying to set value of Popup LOV with dynamic action. I would like to set a year after to have choosen a date from a date picker and refresh the year in a popup LOV item.
On Apex I've create a popup Lov item called P2_YEAR and a date picker called P2_DATE. On P2_date, I've created a dynamic action (Client-side Condition item not null - P2_YEAR) with two true condition.
First condition: Execute a Pl\sql code to extract the year:
declare
year number;
tmp date;
begin
tmp:=:P2_DATE;
SELECT EXTRACT (YEAR FROM tmp) YEAR
into year
FROM DUAL;
:P2_EXTRACT_YEAR := YEAR;
return;
end;
:P2_EXTRACT_YEAR is an item hidden.
and second condition: an Exectute Javascript code
$s('extractyear',$v('P2_EXTRACT_YEAR'));
On P2_Year I added in Advanced - CSS classes the class name extractyear.
What I would obtain is to show the year in the popup item box and if I push on arrow to show only the year previously extract from the date.
This configuration doesn't work.

Answer 1

There are 2 portions to your answer: 1) generate the list of values for P2_YEAR. 2) set the value for P2_YEAR
1) This can be achieved using a cascading LOV on item P2_YEAR. Use source
WITH YEARS (yr) AS
(
SELECT TO_CHAR(TO_DATE(:P2_DATE,'DD-MON-YYYY'),'YYYY') + LEVEL - 2 FROM DUAL
CONNECT BY LEVEL < 3
)
SELECT yr as r, yr as d FROM years
and set parent item P2_DATE.
My item P2_DATE has format mask DD-MON-YYYY
Now if the P2_DATE changes, the options in P2_YEAR will change accordingly.
2) do this using a dynamic action on change of P2_DATE
first action: set value, pl/sql expression, EXTRACT( YEAR FROM TO_DATE(:P2_DATE,'DD-MON-YYYY')) on item P2_EXTRACTYEAR
2nd action: execute javascript code, affected element Item P2_YEAR
apex.item("P2_DATE").setValue(apex.item( "P2_EXTRACTYEAR" ).getValue(),apex.item( "P2_EXTRACTYEAR" ).getValue());

Answer 2

Right-click on the :P2_DATE and select Create Dynamic Action. Set the following properties:
Event: Change
Selection Type: Items(s)
Item: P2_DATE
Client Side Condition
Type: Item is not null
Item(s): P2_DATE
Right-click the dynamic action and select either Create TRUE Action. Set the following properties:
Action: Set Value
Set Type: PL/SQL expression
PL/SQL expression : TO_CHAR(TO_DATE(:P2_DATE,'DD-MON-YYYY'),'YYYY')
Items to Submit: P2_DATE
Affected Elements > Selection Type: Item(s)
Affected Elements > Item(s): P2_YEAR
FALSE Action
Action : Set value
Set Type: PL/SQL expression
PL/SQL expression : :P2_YEAR = ''
Items to Submit: P2_YEAR
Affected Elements > Selection Type: Item(s)
Affected Elements > Item(s): P2_YEAR