FOR I IN 1..HTMLDB_APPLICATION.G_F01.COUNT

Question

I cannot seem to get row processing (using G_Fxx.count) to work property.
I have followed the HOWTO section to create an updateable report with a Checkbox. On Load, all checkboxes are set to UNCHECKED:
SELECT X.OFFICER_ID
, X.OFFICER_NAME_TX
, X.OFFICER_TITLE_TX
FROM (
SELECT HTMLDB_ITEM.CHECKBOX(1,'N',NULL,'Y')
|| HTMLDB_ITEM.HIDDEN(2,OFFICER_ID) OFFICER_ID
, HTMLDB_ITEM.TEXT(3,OFFICER_NAME_TX) OFFICER_NAME_TX
, HTMLDB_ITEM.TEXT(4,OFFICER_TITLE_TX) OFFICER_TITLE_TX
FROM CDIS_INV_OFFICER
WHERE CORONER_CASE_ID = :P1_CORONER_CASE_ID
UNION ALL
SELECT HTMLDB_ITEM.CHECKBOX(1,'N',NULL,'Y')
|| HTMLDB_ITEM.HIDDEN(2,NULL) OFFICER_ID
, HTMLDB_ITEM.TEXT(3,NULL) OFFICER_NAME_TX
, HTMLDB_ITEM.TEXT(4,NULL) OFFICER_TITLE_TX
FROM ALL_OBJECTS WHERE ROWNUM <= NVL(:P2_ADD_OFFICER_CNT, 0)) X
I attempt to loop through the looped rows and upate the Officer Name and Title for those rows checked.
BEGIN
-- Loop through the rows that have been checked.
FOR I IN 1..HTMLDB_APPLICATION.G_F01.COUNT
LOOP
-- Update the Officer Name and Title if checked.
CDIS$CDIS_INV_OFFICER_U.P_UPDATE_BY_OFFICER_ID
( HTMLDB_APPLICATION.G_F02(I)
, :P1_CORONER_CASE_ID
, REPLACE(HTMLDB_APPLICATION.G_F03(I),'%'||'NULL%',NULL)
, REPLACE(HTMLDB_APPLICATION.G_F04(I),'%'||'NULL%',NULL)
, :F118_STATUS_CD
, :F118_STATUS_DESC ) ;
END IF ;
END LOOP;
EXCEPTION
WHEN OTHERS THEN
:F118_STATUS_CD := '1' ;
:F118_STATUS_DESC := SUBSTR((SQLERRM),1,2000);
END ;
If I check row 1 and 3 and hit the UPDATE button, rows 1 and 2 get updated. If I check rows 1, 3, 5, 7 and 9, then rows 1 to 5 get updated.
From what I can determine, all that FOR I IN 1..HTMLDB_APPLICATION.G_F01.COUNT holds is the count of the rows update. Then when I loop through, I update the FIRST X-many rows. So, if 5 rows are checked, the first 5 rows are updated.
What exactly am I doing wrong?

Answer 1

Vivek thanks for helping find the solution.
I see that there are several threads on this topic – having to do with updateable reports, checkboxes and hidden columns (most likely the Primary Key or parts of the Primary Key). Maybe I should write a HOWTO, but here first is the solution for those that are currently experiencing this problem.
First let me address the value contained within HTMLDB_APPLICATION.G_F01.COUNT:
G_F01.COUNT contains the number of rows checked. It does not identify those rows. Meaning, if you have 3 rows checked this variable will contain the number 3. If you use this variable in a LOOP Statement (i.e. "FOR i IN 1..HTMLDB_APPLICATION.G_F01.COUNT") the variable "i" will start at 1 and be incremented by 1 until it gets to 3. So, the values will be 1, 2 and 3.
If you then reference HTMLDB_APPLICATION.G_F03(i), you will reference the 3rd column in the array for rows 1, 2 and 3. This is not necessarily the checked rows. Meaning if rows 1, 3 and 5 are checked and then HTMLDB_APPLICATION.G_F03(i) is referenced in the loop, the wrong rows will be referenced.
The solution is "not to reference HTMLDB_APPLICATION.G_F03(i)" but instead "to reference HTMLDB_APPLICATION.G_F03(HTMLDB_APPLICATION.G_F01(i))".
Within my Region Definition, I have:
SELECT HTMLDB_ITEM.CHECKBOX(1,ROWNUM)
_______, X.Officer_Name
_______, X.Officer_Title
FROM (
SELECT HTMLDB_ITEM.HIDDEN(2,Officer_Id)
______|| HTMLDB_ITEM.TEXT(3,Officer_Name) Officer_Name
______, HTMLDB_ITEM.TEXT(4,Officer_Title) Officer_Title
FROM  CDISINV_OFFICER
WHERE Coroner_Case_Id = :P1_CORONER_CASE_ID ) X
The Checkbox is stored in F01. The Hidden Primary Key is stored in F02 (if there were multiple columns in the Primary Key, one would have multiple hidden columns and multiple associated F##s). The updateable report columns are stored in F03 and F04.
Within my "After Update" Process (On Submit – After Computations and Validations), I have:
BEGIN
FOR I IN 1..HTMLDB_APPLICATION.G_F01.COUNT
LOOP
UPDATE CDIS_INV_OFFICER
____SET Officer_Name = HTMLDB_APPLICATION.G_F03(HTMLDB_APPLICATION.G_F01(i))
_______, Officer_Title = HTMLDB_APPLICATION.G_F04(HTMLDB_APPLICATION.G_F01(i))
WHERE Coroner_Case_Id = :P1_CORONER_CASE_ID
___AND Officer_Id = HTMLDB_APPLICATION.G_F02(HTMLDB_APPLICATION.G_F01(i)) ;
END LOOP;
Notice that I am referencing F03(F01(i)) and not F03(i).
Instead of going F03(1), F03(2) then F03(3), I am actually referencing the rows associated with the checkboxes.
This is how the Checked Rows (where the CHECKBOX is set to “Enabled”) are selected, via the ROWNUM stored within the Regional Definition.
This solution works well.
I hope you find my explanation helpful.