No worries, I really appreciate you taking the time to explain the reason
for it. I am looking at the CommaSeparatedIntegerField (CSIF) seriously for
the exits. It seems straightforward to just use the province_id from the
exit provinces as the values in the CSIF, and then it's easy to pull the
nam
On Fri, Feb 19, 2010 at 2:48 AM, Timothy Kinney
wrote:
> What does it mean to check about index selectivity? Sorry, my knowledge of
> databases is mostly as a user. But I am learning a lot this week.
I intentionally left it out, since i'm not the best teacher, you might
not need it (if you choose
Thanks for reasoning :)
Regards,
Viet.
David De La Harpe Golden wrote:
On 19/02/10 08:32, Le Quoc Viet wrote:
Hi Tim,
Thanks for reply. I mean if I want Samurai to be out of all rooms?
ForeignKey disallows Null.
minor point - ForeignKey(null=True, blank=True) will merrily allow
null if you
On 19/02/10 08:32, Le Quoc Viet wrote:
Hi Tim,
Thanks for reply. I mean if I want Samurai to be out of all rooms?
ForeignKey disallows Null.
minor point - ForeignKey(null=True, blank=True) will merrily allow null
if your database allows nullable foreign keys at all (chances are it
does). It
It doesn't make sense for the Samurai to be out of all rooms. If it's
because he is dead you should create a room for that, such as "Graveyard" or
something. However, I think it would work to include "blank = True" in the
declaration. This would allow the field to have a null value.
-Tim
On Fri,
Hi Tim,
Thanks for reply. I mean if I want Samurai to be out of all rooms?
ForeignKey disallows Null. Should I do like this: Create a default dummy
Room and assign it by default?
Viet.
Timothy Kinney wrote:
I don't understand your question. The Samurai requires one room by the
declaration:
On Thu, Feb 18, 2010 at 11:31 PM, Timothy Kinney
wrote:
> This is a fabulous response, Peter. Thank you very much for making this so
> clear. The samurai_set is a revelation for me as well. I see now that I
> should look more carefully at the methods available for the models.
>
> If I can ask anot
I don't understand your question. The Samurai requires one room by the
declaration:
class Samurai(models.Model):
...
room = models.ForeignKey("Room")
...
Since it is a ForeignKey, it can only accept one value and the value cannot
be None. Therefore, all samurai will always be in only one room at
Thanks for explanation. What if Samurai can be outside all Rooms and can
be at most at 1 Room at a time?
Regards,
Viet.
Peter Herndon wrote:
On Feb 18, 2010, at 11:47 PM, Timothy Kinney wrote:
Here's the system I'm currently using that doesn't work too well...
Samurai (id, name)
Room (
What does it mean to check about index selectivity? Sorry, my knowledge of
databases is mostly as a user. But I am learning a lot this week.
-Tim
On Fri, Feb 19, 2010 at 1:39 AM, Javier Guerra wrote:
> On Fri, Feb 19, 2010 at 2:31 AM, Timothy Kinney
> wrote:
> > is there a way to store a list
On Fri, Feb 19, 2010 at 2:31 AM, Timothy Kinney
wrote:
> is there a way to store a list variable in a model as a field (without
> creating another table)?
There's no 'list' field type in SQL. There's a 'set' in MySQL; but i
think it's not standard, so not supported in Django. but for small
sets
This is a fabulous response, Peter. Thank you very much for making this so
clear. The samurai_set is a revelation for me as well. I see now that I
should look more carefully at the methods available for the models.
If I can ask another question about this same topic, is there a way to store
a list
On Feb 18, 2010, at 11:47 PM, Timothy Kinney wrote:
>
> Here's the system I'm currently using that doesn't work too well...
>
> Samurai (id, name)
>
> Room (id, name, ForeignKey(Samurai), ForeignKey(Province))
>
> Province (id, name)
>
>
> Can someone suggest which relationships to use to g
I'm having some trouble wrapping my head around some ORM concepts in
Django.
I have a Samurai model, and I want to develop a Province and Room
model. The idea is that each Room is associated with a Province (is in
the province) and each Room can hold multiple samurai (and items).
I want to be abl
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