Get the values of the selected rows with checked checkbox - oracle-apex

Question

Having a report of the services table with checkbox for each row, I am trying to get the values of the selected service, so that when I click on next I can create a report with the services chosen in the new page.
I have tried in this way:
Report of the services table.
select code,
name,
cost,
apex_item.hidden(p_idx => 1,
p_value => code) ||
apex_item.hidden(p_idx => 2,
p_value => cost) ||
apex_item.checkbox2(p_idx => 3,
p_value => code) CheckBox
from services
I created a process.
Source:
begin
apex_collection.CREATE_OR_TRUNCATE_COLLECTION ('SDBA_ORDER_ITEMS1');
for i in 1..apex_application.g_f01.count loop
apex_collection.add_member(
p_collection_name => 'SDBA_ORDER_ITEMS1',
p_c001 => to_number(apex_application.g_f01(i)), -- service_code
p_c002 => to_number(apex_application.g_f02(i)), -- cost
p_c003 => to_number(apex_application.g_f03(i)) -- service_code
);
end loop;
end;
Server-side Condition:
begin
for i in 1..apex_application.g_f01.count loop
for j in 1..apex_application.g_f03.count loop
if apex_application.g_f01(i) = apex_application.g_f03(j) then
return true;
else
return false;
end if;
end loop;
end loop;
end;
Report on the next page.
select (select name from services where code = c001) as service_name,
c002 as cost
from apex_collections
where collection_name = 'SDBA_ORDER_ITEMS1'
order by 1
Report on the next page.
select (select name from services where code = c001) as service_name,
c002 as cost
from apex_collections
where collection_name = 'SDBA_ORDER_ITEMS1'
order by 1
In this report it shows all the services of the table instead of the selected ones.
How can I get only the selected rows? Can anybody help me please?
Thanks in advance.

Answer 1

Checkboxes are formed into dense collections, not potentially sparse like the other item types. I think this is a product of web tech, not APEX.
So if you had ID, Name, Checkbox
1 - ada - checked
2 - charles - not checked
3 - alan - checked
There would be 3 index elements in ID and Names array, and only 2 in the checkbox array - and index element 3 would be empty.
So you need to match checkbox existence by indexing by the code value, and checking for existence more like
apex_application.g_f03(apex_application.g_f01.code)
While taking care of potential no_data_found

Answer 2

Reading Oracle documentation:
Note that check boxes displayed using APEX_ITEM.CHECKBOX only contain values in the APEX_APPLICATION arrays for those rows which are checked. Unlike other items (TEXT, TEXTAREA, and DATE_POPUP) which can contain an entry in the corresponding APEX_APPLICATION array for every row submitted, a check box only has an entry in the APEX_APPLICATION array if it is selected.
I've build my report referencing rownum on APEX_ITEM.CHECKBOX.
Report code:
SELECT APEX_ITEM.CHECKBOX(p_idx => 1, p_value => ROWNUM) checkb
,APEX_ITEM.HIDDEN(p_idx => 2, p_value => CUSTOMER_ID)||CUSTOMER_ID CUSTOMER_ID
,APEX_ITEM.HIDDEN(p_idx => 3, p_value => CUST_STATE)||CUST_STATE CUST_STATE
,CUST_FIRST_NAME ||' '||CUST_LAST_NAME
FROM DEMO_CUSTOMERS
And then based on that checked rows, the process is recovering the values in the hidden items arrays corresponding position.
Process PL/SQL code:
BEGIN
--
FOR i IN 1..APEX_APPLICATION.G_F01.COUNT LOOP
--
INSERT INTO ROMINA_TEST (LOG)
VALUES ('CUSTOMER_ID: '||APEX_APPLICATION.G_F02(APEX_APPLICATION.G_F01(i))||' - CUST_STATE: '||APEX_APPLICATION.G_F03(APEX_APPLICATION.G_F01(i)));
--
END LOOP;
--
END;
And it works! =)