As I understand it, you're asking about how to store it - irrelevant
of how you display it.
To me, this is dependent on a couple of factors:
1) Is this strictly an ordering thing, or a priority thing? In
other words, will there be gaps (like, record A has a 10 priority,
record B has 20), or is it very ordered, like a linked list (hint) ?
2) How often does it change?
I've often been faced with the challenge of being able to insert
something into a custom ordered set without having to change ALL of
the objects in the set. This is why something like an integer from 1
to X doesn't really work - it might affect too many objects. If it's
a situation like that, I prefer to have either links in the EO's to
each other, or an external EO that manages the linked list for me.
That way, insertions are a no-brainer - we just move the
relationships around.
In general, this is the approach I favor, since you never have to do
a problem resolution phase (like 2 records have the same double or
int, etc).
Ken
On Apr 27, 2006, at 9:34 AM, Amedeo Mantica wrote:
Hello friends!
does anyone have an idea how to implement a custom row ordering in
a database?
My customers want to custom order row in database
i can create an ordering column with a double type (number) so i
can always move a row between two others...
Actually I don't know how to graphically impement this (user
interface)
do you have ideas? or other methods?
Thanks
Amedeo
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