APEX 4 Tabular Form Collection

Question

Hello everyone,
I have a Tabular Form on Collection (APEX 4). I only want to update the records that are checked, but it validates and updated all the records regarless of the checked records. How do I get this (page-to-collection) to only update the selected records. Any help is greatly appreciated.
This is my table-to-collection:
DECLARE
l_collection_name VARCHAR2(50);
l_query VARCHAR2(32767);
BEGIN
l_collection_name := 'WORK_TABLE';
IF apex_collection.collection_exists(l_collection_name)
THEN
apex_collection.delete_collection(
p_collection_name => l_collection_name);
END IF;
l_query := 'select seq_no,' -- c001 => f01
|| ' fk_paygrade, ' -- c002 => f02
|| ' annual_hour, ' -- c003 => f03
|| ' A1, ' -- c004 => f04
|| ' A2, ' -- c005 => f05
|| ' A3, ' -- c006 => f06
|| ' A4, ' -- c007 => f07
|| ' A5, ' -- c008 => f08
|| ' A6, ' -- c009 => f09
|| ' A7, ' -- c010 => f10
|| ' A8, ' -- c011 => f11
|| ' A9, ' -- c012 => f12
|| ' A10, ' -- c013 => f13
|| ' A11, ' -- c014 => f14
|| ' A12, ' -- c015 => f15
|| ' A13, ' -- c016 => f16
|| ' A14, ' -- c017 => f17
|| ' H1, ' -- c018 => f18
|| ' H2, ' -- c019 => f19
|| ' H3, ' -- c020 => f20
|| ' H4, ' -- c021 => f21
|| ' H5, ' -- c022 => f22
|| ' H6, ' -- c023 => f23
|| ' H7, ' -- c024 => f24
|| ' H8, ' -- c025 => f25
|| ' H9, ' -- c026 => f26
|| ' H10, ' -- c027 => f27
|| ' H11, ' -- c028 => f28
|| ' H12, ' -- c029 => f29
|| ' H13, ' -- c030 => f30
|| ' H14, ' -- c031 => f31
|| ' NULL, ' --c032 => f32
|| ' NULL, ' --c033 => f33
|| ' NULL, ' --c034 => f34
|| ' NULL, ' --c035 => f35 
|| ' NULL, ' --c036 => f36  
|| ' NULL, ' --c037 => f37  
|| ' NULL, ' --c038 => f38 
|| ' NULL, ' --c039 => f39  
|| ' NULL, ' --c040 => f40  
|| ' NULL, ' --c041 => f41 
|| ' NULL, ' --c042 => f42  
|| ' NULL, ' --c043 => f43 
|| ' NULL, ' --c044 => f44  
|| ' NULL, ' --c045 => f45 
|| ' NULL, ' --c046 => f46
|| ' ''O'', ' --c047 => f47 
|| ' wwv_flow_item.md5(seq_no, fk_paygrade, annual_hour, A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, H1, H2, H3, H4, H5, H6, H7, H8, H9, H10, H11, H12, H13, H14) ' -- c048
|| 'from paygrade_increase ';
apex_collection.create_collection_from_query_b(
p_collection_name => l_collection_name,
p_query => l_query);
IF :REQUEST = 'ADD'
THEN
apex_collection.add_member(
p_collection_name => l_collection_name
END IF;
END;
From collection-to-tabular-form report:
SELECT APEX_ITEM.HIDDEN(47,c047,NULL,'f47_'|| '#ROWNUM#')
|| APEX_ITEM.HIDDEN(48,c048,NULL,'f48_'|| '#ROWNUM#')
|| APEX_ITEM.HIDDEN(49,seq_id,NULL,'f49_'|| '#ROWNUM#')
|| APEX_ITEM.HIDDEN(1,c001,NULL,'f01_'|| '#ROWNUM#')
|| APEX_ITEM.CHECKBOX(
50,
seq_id,
NULL,
CASE
WHEN c047 = 'U' THEN seq_id
END,
'f50_' || '#ROWNUM#'
) AS update_checkbox,
APEX_ITEM.TEXT(
2,
c002,
20,
50,
NULL,
'f02_' || '#ROWNUM#'
) as fk_paygrade,
APEX_ITEM.TEXT(
3,
c003,
20,
50,
NULL,
'f03_' || '#ROWNUM#'
) AS annual_hour,
APEX_ITEM.TEXT(
4,
c004,
20,
50,
NULL,
'f04_' || '#ROWNUM#'
) AS A1,
APEX_ITEM.TEXT(
5,
c005,
20,
50,
NULL,
'f05_' || '#ROWNUM#'
) AS A2,
APEX_ITEM.TEXT(
6,
c006,
20,
50,
NULL,
'f06_' || '#ROWNUM#'
) AS A3,
APEX_ITEM.TEXT(
7,
c007,
20,
50,
NULL,
'f07_' || '#ROWNUM#'
) AS A4,
APEX_ITEM.TEXT(
8,
c008,
20,
50,
NULL,
'f08_' || '#ROWNUM#'
) AS A5,
APEX_ITEM.TEXT(
9,
c009,
20,
50,
NULL,
'f09_' || '#ROWNUM#'
) AS A6,
APEX_ITEM.TEXT(
10,
c010,
20,
50,
NULL,
'f10_' || '#ROWNUM#'
) AS A7,
APEX_ITEM.TEXT(
11,
c011,
20,
50,
NULL,
'f11_' || '#ROWNUM#'
) AS A8,
apex_item.text(
12,
c012,
20,
50,
NULL,
'f12_' || '#ROWNUM#'
) AS A9,
apex_item.text(
13,
c013,
20,
50,
NULL,
'f13_' || '#ROWNUM#'
) AS A10,
apex_item.text(
14,
c014,
20,
50,
NULL,
'f14_' || '#ROWNUM#'
) AS A11,
apex_item.text(
15,
c015,
20,
50,
NULL,
'f15_' || '#ROWNUM#'
) AS A12,
apex_item.text(
16,
c016,
20,
50,
NULL,
'f16_' || '#ROWNUM#'
) AS A13,
apex_item.text(
17,
c017,
20,
50,
NULL,
'f17_' || '#ROWNUM#'
) AS A14,
APEX_ITEM.TEXT(
18,
c018,
20,
50,
NULL,
'f18_' || '#ROWNUM#'
) as H1,
APEX_ITEM.TEXT(
19,
c019,
20,
50,
NULL,
'f19_' || '#ROWNUM#'
) as H2,
APEX_ITEM.TEXT(
20,
c020,
20,
50,
NULL,
'f20_' || '#ROWNUM#'
) as H3,
APEX_ITEM.TEXT(
21,
c021,
20,
50,
NULL,
'f21_' || '#ROWNUM#'
) as H4,
APEX_ITEM.TEXT(
22,
c022,
20,
50,
NULL,
'f22_' || '#ROWNUM#'
) as H5,
APEX_ITEM.TEXT(
23,
c023,
20,
50,
NULL,
'f23_' || '#ROWNUM#'
) as H6,
APEX_ITEM.TEXT(
24,
c024,
20,
50,
NULL,
'f24_' || '#ROWNUM#'
) as H7,
APEX_ITEM.TEXT(
25,
c025,
20,
50,
NULL,
'f25_' || '#ROWNUM#'
) as H8,
APEX_ITEM.TEXT(
26,
c026,
20,
50,
NULL,
'f26_' || '#ROWNUM#'
) as H9,
APEX_ITEM.TEXT(
27,
c027,
20,
50,
NULL,
'f27_' || '#ROWNUM#'
) as H10,
APEX_ITEM.TEXT(
28,
c028,
20,
50,
NULL,
'f28_' || '#ROWNUM#'
) as H11,
APEX_ITEM.TEXT(
29,
c029,
20,
50,
NULL,
'f29_' || '#ROWNUM#'
) as H12,
APEX_ITEM.TEXT(
30,
c030,
20,
50,
NULL,
'f30_' || '#ROWNUM#'
) as H13,
APEX_ITEM.TEXT(
31,
c031,
20,
50,
NULL,
'f31_' || '#ROWNUM#'
) as H14
FROM apex_collections
WHERE collection_name = 'WORK_TABLE'
Page-to-collection:
DECLARE
l_collection_name APEX_COLLECTIONS.COLLECTION_NAME%TYPE;
l_original_md5 VARCHAR2(3000);
l_latest_md5 VARCHAR2(3000);
BEGIN
l_collection_name := 'WORK_TABLE';
FOR x IN 1 .. apex_application.g_f49.count
LOOP
IF apex_application.g_f01(x) IS NOT NULL --ID exists, check to see if record was updated
THEN
SELECT c048
INTO l_original_md5
FROM apex_collections
WHERE collection_name = l_collection_name
AND seq_id = apex_application.g_f49(x);
l_latest_md5 := wwv_flow_item.md5(
apex_application.g_f01(x),
apex_application.g_f02(x),
apex_application.g_f03(x),
apex_application.g_f04(x),
apex_application.g_f05(x),
apex_application.g_f06(x),
apex_application.g_f07(x),
apex_application.g_f08(x),
apex_application.g_f09(x),
apex_application.g_f10(x),
apex_application.g_f11(x),
apex_application.g_f12(x),
apex_application.g_f13(x),
apex_application.g_f14(x),
apex_application.g_f15(x),
apex_application.g_f16(x),
apex_application.g_f17(x),
apex_application.g_f18(x),
apex_application.g_f19(x),
apex_application.g_f20(x),
apex_application.g_f21(x),
apex_application.g_f22(x),
apex_application.g_f23(x),
apex_application.g_f24(x),
apex_application.g_f25(x),
apex_application.g_f26(x),
apex_application.g_f27(x),
apex_application.g_f28(x),
apex_application.g_f29(x),
apex_application.g_f30(x),
apex_application.g_f31(x)
IF l_original_md5 != l_latest_md5
THEN
apex_collection.update_member(
p_collection_name => l_collection_name,
p_seq => apex_application.g_f49(x),
p_c001 => apex_application.g_f01(x),
p_c002 => apex_application.g_f02(x),
p_c003 => apex_application.g_f03(x),
p_c004 => apex_application.g_f04(x),
p_c005 => apex_application.g_f05(x),
p_c006 => apex_application.g_f06(x),
p_c007 => apex_application.g_f07(x),
p_c008 => apex_application.g_f08(x),
p_c009 => apex_application.g_f09(x),
p_c010 => apex_application.g_f10(x),
p_c011 => apex_application.g_f11(x),
p_c012 => apex_application.g_f12(x),
p_c013 => apex_application.g_f13(x),
p_c014 => apex_application.g_f14(x),
p_c015 => apex_application.g_f15(x),
p_c016 => apex_application.g_f16(x),
p_c017 => apex_application.g_f17(x),
p_c018 => apex_application.g_f18(x),
p_c019 => apex_application.g_f19(x),
p_c020 => apex_application.g_f20(x),
p_c021 => apex_application.g_f21(x),
p_c022 => apex_application.g_f22(x),
p_c023 => apex_application.g_f23(x),
p_c024 => apex_application.g_f24(x),
p_c025 => apex_application.g_f25(x),
p_c026 => apex_application.g_f26(x),
p_c027 => apex_application.g_f27(x),
p_c028 => apex_application.g_f28(x),
p_c029 => apex_application.g_f29(x),
p_c030 => apex_application.g_f30(x),
p_c031 => apex_application.g_f31(x),
p_c047 => 'U',
p_c048 => apex_application.g_f48(x)
END IF;
ELSE --ID does not exist, must be new record
apex_collection.update_member(
p_collection_name => l_collection_name,
p_seq => apex_application.g_f49(x),
p_c001 => apex_application.g_f01(x),
p_c002 => apex_application.g_f02(x),
p_c003 => apex_application.g_f03(x),
p_c004 => apex_application.g_f04(x),
p_c005 => apex_application.g_f05(x),
p_c006 => apex_application.g_f06(x),
p_c007 => apex_application.g_f07(x),
p_c008 => apex_application.g_f08(x),
p_c009 => apex_application.g_f09(x),
p_c010 => apex_application.g_f10(x),
p_c011 => apex_application.g_f11(x),
p_c012 => apex_application.g_f12(x),
p_c013 => apex_application.g_f13(x),
p_c014 => apex_application.g_f14(x),
p_c015 => apex_application.g_f15(x),
p_c016 => apex_application.g_f16(x),
p_c017 => apex_application.g_f17(x),
p_c018 => apex_application.g_f18(x),
p_c019 => apex_application.g_f19(x),
p_c020 => apex_application.g_f20(x),
p_c021 => apex_application.g_f21(x),
p_c022 => apex_application.g_f22(x),
p_c023 => apex_application.g_f23(x),
p_c024 => apex_application.g_f24(x),
p_c025 => apex_application.g_f25(x),
p_c026 => apex_application.g_f26(x),
p_c027 => apex_application.g_f27(x),
p_c028 => apex_application.g_f28(x),
p_c029 => apex_application.g_f29(x),
p_c030 => apex_application.g_f30(x),
p_c031 => apex_application.g_f31(x),
p_c047 => 'N',
p_c048 => apex_application.g_f48(x)
END IF;
END LOOP;
IF :REQUEST = 'DELETE'
THEN
FOR x IN 1 .. apex_application.g_f50.count
LOOP
apex_collection.update_member_attribute(
p_collection_name => l_collection_name,
p_seq => apex_application.g_f50(x),
p_attr_number => '47',
p_attr_value => 'D'
END LOOP;
END IF;
END;
Collection-to-table
DECLARE
l_table_md5 VARCHAR2(32);
l_collection_name APEX_COLLECTIONS.COLLECTION_NAME%TYPE;
l_del_count PLS_INTEGER := 0;
l_upd_count PLS_INTEGER := 0;
l_ins_count PLS_INTEGER := 0;
l_success_message VARCHAR2(32767);
CURSOR op_lock_check_cur (p_id IN NUMBER)
IS
SELECT wwv_flow_item.md5(seq_no, fk_paygrade, annual_hour, a1, a2, a3, a4, a5, a6, a7, a8,
a9, a10, a11, a12, a13, a14, h1, h2, h3, h4, h5, h6, h7, h8, h9,
h10, h11, h12, h13, h14)
FROM paygrade_increase
WHERE seq_no = op_lock_check_cur.p_id
FOR UPDATE;
BEGIN
l_collection_name := 'WORK_TABLE';
FOR x IN (
SELECT *
FROM apex_collections
WHERE collection_name = l_collection_name
AND c047 IN ('N','U','D')
LOOP
IF x.c047 = 'N'
THEN
INSERT INTO PAYGRADE_INCREASE(
seq_no,
fk_paygrade,
annual_hour,
a1,
a2,
a3,
a4,
a5,
a6,
a7,
a8,
a9,
a10,
a11,
a12,
a13,
a14,
h1,
h2,
h3,
h4,
h5,
h6,
h7,
h8,
h9,
h10,
h11,
h12,
h13,
h14
) VALUES (
users_seq.nextval,
x.c002,
x.c003,
x.c004,
x.c005,
x.c006,
x.c007,
x.c008,
x.c009,
x.c010,
x.c011,
x.c012,
x.c013,
x.c014,
x.c015,
x.c016,
x.c017,
x.c018,
x.c019,
x.c020,
x.c021,
x.c022,
x.c023,
x.c024,
x.c025,
x.c026,
x.c027,
x.c028,
x.c029,
x.c030,
x.c031
l_ins_count := l_ins_count + 1;
ELSIF x.c047 = 'U'
THEN
--Optimistic lock check
--MD5 should be identical to collection initialization proc
OPEN op_lock_check_cur(x.c001);
FETCH op_lock_check_cur INTO l_table_md5;
-- Compare the checksum values and if they are different, raise an error.
IF l_table_md5 != x.c048
THEN
raise_application_error(
-20001,
'Current version of data in database has changed '
|| 'since user initiated update process.'
END IF;
UPDATE paygrade_increase
SET fk_paygrade = x.c002,
annual_hour = x.c003,
a1 = x.c004,
a2 = x.c005,
a3 = x.c006,
a4 = x.c007,
a5 = x.c008,
a6 = x.c009,
a7 = x.c010,
a8 = x.c011,
a9 = x.c012,
a10 = x.c013,
a11 = x.c014,
a12 = x.c015,
a13 = x.c016,
a14 = x.c017,
h1 = x.c018,
h2 = x.c019,
h3 = x.c020,
h4 = x.c021,
h5 = x.c022,
h6 = x.c023,
h7 = x.c024,
h8 = x.c025,
h9 = x.c026,
h10 = x.c027,
h11 = x.c028,
h12 = x.c029,
h13 = x.c030,
h14 = x.c031
WHERE CURRENT OF op_lock_check_cur;
CLOSE op_lock_check_cur;
l_upd_count := l_upd_count + 1;
ELSIF x.c047 = 'D'
THEN
DELETE FROM paygrade_increase
WHERE seq_no = x.c001;
l_del_count := l_del_count + 1;
END IF;
END LOOP;
apex_collection.delete_collection(p_collection_name => l_collection_name);
l_success_message :=
l_ins_count || ' rows inserted, ' ||
l_upd_count || ' rows updated, ' ||
l_del_count || ' rows deleted';
:PX_SUCCESS_MESSAGE := l_success_message;
END;
Thank you so much,
MT

Answer 1

Hi,
You need to modify your "Page-to-collection:" code so that you mark the collection member c047 as updated (U) only if that particular row's checkbox was checked. Given the fact that the checkbox APEX_APPLICATION global variable holds only checked values, you need to loop through the checkbox variable for every row to determine if the checkbox was checked.
Here is the pseudocode:
-- Your "Page-to-collection:" code
-- continues until this below line...
IF l_original_md5 != l_latest_md5
THEN
   -- additional check: mark collection member
   -- as updated only if checkbox is checked
   -- Loop through checked values array
   -- to see if the current row checkbox was checked
   FOR y IN 1 .. apex_application.g_f50.count
   LOOP
      -- compare SEQ_ID stored in hidden item (f49)
      -- against SEQ_ID stored in checkbox (f50)
       IF apex_application.g_f49(x) = apex_application.g_f50(y)
       THEN
         apex_collection.update_member(
         p_collection_name => l_collection_name,
         p_seq => apex_application.g_f49(x),
         p_c001 => apex_application.g_f01(x),
         p_c002 => apex_application.g_f02(x),
         p_c003 => apex_application.g_f03(x),
         p_c004 => apex_application.g_f04(x),
         p_c005 => apex_application.g_f05(x),
         p_c006 => apex_application.g_f06(x),
         p_c007 => apex_application.g_f07(x),
         p_c008 => apex_application.g_f08(x),
         p_c009 => apex_application.g_f09(x),
         p_c010 => apex_application.g_f10(x),
         p_c011 => apex_application.g_f11(x),
         p_c012 => apex_application.g_f12(x),
         p_c013 => apex_application.g_f13(x),
         p_c014 => apex_application.g_f14(x),
         p_c015 => apex_application.g_f15(x),
         p_c016 => apex_application.g_f16(x),
         p_c017 => apex_application.g_f17(x),
         p_c018 => apex_application.g_f18(x),
         p_c019 => apex_application.g_f19(x),
         p_c020 => apex_application.g_f20(x),
         p_c021 => apex_application.g_f21(x),
         p_c022 => apex_application.g_f22(x),
         p_c023 => apex_application.g_f23(x),
         p_c024 => apex_application.g_f24(x),
         p_c025 => apex_application.g_f25(x),
         p_c026 => apex_application.g_f26(x),
         p_c027 => apex_application.g_f27(x),
         p_c028 => apex_application.g_f28(x),
         p_c029 => apex_application.g_f29(x),
         p_c030 => apex_application.g_f30(x),
         p_c031 => apex_application.g_f31(x),
         p_c047 => 'U',
         p_c048 => apex_application.g_f48(x)
       END IF;
   END LOOP; -- end checkbox loop
END IF; -- end UPDATE check
ELSE --ID does not exist, must be new record
-- rest of the code for "Page-to-collection:"
--Thanks!
JMcG