Question

I need to re-order via form submission rows in a table with the following structure for a nested page layout

Columns: (table name is: sourcedocs3)

sort1 | sort2 | type

---

1 | 1 | parent

1 | 2 | child

2 | 1 | no nesting

3 | 1 | parent

3 | 2 | child

3 | 3 | child

4 | 1 | no nesting

I need to be able to re-order (via PHP/Mysql) 3 to 1 without losing basic structure — 3 becomes 1 and all rows with value of 1 are incremented). Sounded simple but I’m having a hard time keeping the structure intact after shuffling (3|1 should be 1|1, 3|2 should be 1|2 etc)

Answer 1

START TRANSACTION;

UPDATE `why_do_people_never_give_the_table_name` SET sort1 = 999 
WHERE sort1 = 3;

UPDATE `why_do_people_never_give_the_table_name` SET sort1 = sort1 + 1 
WHERE sort1 BETWEEN 1 AND 3
ORDER BY sort1 DESC;

UPDATE `why_do_people_never_give_the_table_name` SET sort1 = 1 
WHERE sort1 = 999;

COMMIT;

Note that if you were moving a menu to a later position, e.g. moving 2 to 4, you’d want to order the second update in ASCending order.