> This is still about 50 times better than the form with Q objects and
> LEFT OUTER joins.
This is rather unusual. A join in the database should be quite a bit
faster than doing things manually, except if the joined tables produce
massive amounts of data. This suggests that you're missing
Well, that is what repeatable read is supposed to do -- once you do a
Foo.objects.all() (or whatever) query, re-running the query will give you
the same result. That's why it's called repeatable read. You have to either
start a new transaction to break that visibility barrier or not use
I'd guess it's the usual model-magic dealing with app_label, which causes
them not to appear under "app1" (because, well, you defined them somewhere
else). Try to set app_label manually in your model's Meta class.
Cheers,
mjl
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It's simply a question of what you want to model.
*GenericFK* means for each instance "I have a relationship with some
other (undefined) entity". *MultipleFK* means "I have relationships with
both well-known entities A and B". Totally different things.
Cheers,
mjl
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Continent = form.cleaned_data['Continent']Continent =
dict(form.fields['Continent'])[Continent]
The obvious confusion stemming from the upper case variable aside, the
second line is total nonsense. Drop it and you'll be golden.
Cheers,
mjl
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Something like this (totally untested though)
Product.objects.exclude(pk__in=Product.subproducts.through.values_list(
'product_id', flat=True))
perhaps?
Cheers,
mjl
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>
> return getpass.getuser().decode(locale.getdefaultlocale()[1])
> TypeError: decode() argument 1 must be string, not None
>
It needs a valid locale to be set in the environment. Try setting
LC_ALL=en_US before running syncdb.
mjl
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>
> further, i tried putting a sender argument in receiver, but the sender , i
> found (by set_trace) is Cart_cartitems, how can i import this 'shoppingcart.models.Cart_cartitems'> when its only a intermediary model
> that django's creating.
I think you want Cart.cartitems.through
>
> I tryed first this part with db models. but mssql doesnt work on it...
>
BTW, why? I see there's a django-mssql, that should allow you to connect
to the database. Doesn't it work with your version? I've never tried it
though, I just googled around a bit...
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Okay. You seem to be rather confused about the django approach to things
I'm afraid.
(a) You use raw sql instead of django's ORM mapper. That's okayish, but
then you're on your own for building your queries and have to manually do
validation and escaping and whatnot, which is, as you
Don't overthink it.
If believe you are likely to run into cascading recursive updates, then
those cascades will happen no matter where you put the update. You will
need to deal with it some way or another (locking, careful ordering, better
data structures, whatever), but just moving things
Do you actually need both as views proper? The easiest thing would be to
factor out the fetching part of the kundendaten view, make that return just
a dictionary, then call that and update the context in the first view.
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Basically, you can't. M2m fields are saved after the model is saved, so you
either get objects that are not yet ready for that check (as you
experienced) or you will test the previous value of the m2m field, neither
of which is what you want.
You can modify the admin interface and do the
Just put something between the {{ so the templating engine will not be
tempted to interpret it. {{ should do the trick, for example.
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>
> Is this how you meant to set the instance variable or did you mean in
> another way?
>
> def __init__(self, *args, **kwargs):
> super(Player, self).__init__(*args, **kwargs)
> self.matches = Match.objects.select_related().filter( Q(opp1=self)
> | Q(opp2=self) )
Yes,
>
> My problem is when want to display overall player statistics I get about
> 1200 DB-Queries.
> This is because for each player there will be 5 Queries due to
> matches_won, matches_draw, goals, matches_played functions.
>
First easy optimisation: keep
Also, you should really only do saves on a POST request, never on GETs.
mjl
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Also, having a form to parse and validate the POST data is really the way
to go. Even if you never actually show the form to the user, for example in
an AJAX callback, deferring all that responsibility and just use
"form.is_valid()" and "form.cleaned_data" is a lot better than doing
parameter
Well for now you don't NEED to change anything. You'll get those pesky
deprecation warnings, but everything should continue to work fine for now,
so there's no need to rush things, you can change your code as you go along.
mjl
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Probably you are not serving your static files any more as the built-in
staticfiles app only works in debug mode (that's a feature).
mjl
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How about just listening to pre_save or post_save signals on the User
model?
mjl
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One possibility that springs to mind is shared memory, either the sysv
shmem variant or memory mapped files.
mjl
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Just remove the line with "python-format" from your translation since it
isn't a format string after all.
mjl
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Are you sure your context is thread-safe, ie. it's rebuilt from scratch
every time you render an email and not re-used, stored in a global variable,
class variable, whatever? Your problem description very much sounds like
someone is fiddling with the context while the template is rendering.
My guess would be that you named your project directory the same as one of
your app directories, that causes all kind of weird import errors.
mjl
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You might want to read the documentation
at https://docs.djangoproject.com/en/1.3/ref/contrib/staticfiles/ --
especially the big boxes labelled "Warning".
mjl
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1. Define a unicode method on Source that returns whatever you want to
display.
2. Missing comma in one-element tuple.
mjl
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You probably want to use something like
https://docs.djangoproject.com/en/1.3/ref/models/querysets/#extra
to add custom sql expressions to your querysets.
mjl
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Sounds like a join with a table that doesn't have all the rows. Let me
guess: the tables have been filled by some other program and you are just
reading them from Django -- and you are missing a blank=True, null=True on a
ForeignKey in your Django models somewhere.
Cheers,
mjl
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What problems did you encounter? It's easier to help you knowing what went
wrong.
mjl
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Let's see...
Since there is no aggregate on your outer select, the GROUP BY is
basically reduced to a DISTINCT, so we can just do a distinct() on the query
set. The JOINs come automatically as soon as you have ForeignKey fields
(just remember to do a select_related() to avoid excessive
> I cannot simply copy the email to the username because the username must be
> less than 30 characters and, after looking into my database, many email
> addresses go over that.
Note that you can fix that quite easily by putting something like
this
for f in User._meta.fields:
if
> 1. (r'^admin/', include(admin.site.urls)),
That looks like it.
> I tried putting include('admin.site.urls')) but it could not find
> 'admin.site.urls'
Do you have 'django.contrib.admin' in INSTALLED_APPS?
mjl
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> Caught an exception while rendering: 'module' object has no attribute
> 'rindex'
Sounds you are using foo.bar instead of 'foo.bar' somewhere (ie.
module instead of string).
mjl
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> post_info_dict = {
> 'queryset': Post.objects.all(),
You probably don't want to evaluate your queryset here. Drop the .all
() and you'll be good.
mjl
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> > If it's mostly paths that you need to change, check out:
>
> >http://rob.cogit8.org/blog/2008/Jun/20/django-and-relativity/
There's a much easier (IMO anyway) method that does not involve
messing with settings.py. If you just want to find out the directory
of the current application, you
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