Ross wrote:
This is my database now...I will use the item_id for the order but what if I
want to change item_id 3 to item id 1? How can I push all the items down one
place? How can I delete any gaps when items are deleted.
CREATE TABLE `board_papers` (
`id` int(4) NOT NULL auto_increment,
`doc_date` varchar(10) NOT NULL default '0000-00-00',
`article_type` enum('agenda','minutes','paper') NOT NULL default 'agenda',
`fileName` varchar(50) NOT NULL default '',
`fileSize` int(4) NOT NULL default '0',
`fileType` varchar(50) NOT NULL default '',
`content` blob NOT NULL,
`item_id` int(10) default NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 AUTO_INCREMENT=8 ;
-- snip --
Hi Ross,
You can reuse item_id after they have been deleted. So when you delete
item_id = 1, then next time you perform an insert, lookup the lowest
free item_id number and give it as the item_id. That's one small solution.
If you actually want to rank your records by more than just the item_id,
then define a field for each kind of rank you want, or better, add it as
a separate table, like:
board_papers -----< rank
* id
* board_papers_fk <-- id from board_papers
* rank_type (example: readability, technicality...)
* rank_no (rank within the rank type)
Then you can order the board_papers after rank as you like!
Just an idea :)
Enjoy,
John
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
