Re: loop over model ids ? possible ?

On Thu, 24 May 2012 23:19:16 -0700 (PDT), doniyor
<doniyor.v.j@googlemail.com> declaimed the following in
gmane.comp.python.django.user:

> hey guys,
> i need to loop over the number of ids of objects in my db table and create
> accordingly the same number of html fields. how can i do it.. my effort is
> this:
> numberOfIds = Produkt.objects.count()
> i = 1;

This initializer is useless as...

> for i in range(0,numberOfIds):

... you just used the name for the loop index ...

> p = Produkt.objects.get(id=i)

... and the first value you attempt to retrieve is "0" (I'm not
familiar with any DBMS that uses 0 as a value for an autoincrement
primary key field; furthermore, looping over the /count/ of records is
erroneous -- since primary keys do not have to be contiguous if there
have been deletions in the database)...

> #lookup in db and create html input field depending on the #of
> ids.
> i=i+1

... and which also makes this increment operation void...

--
Wulfraed Dennis Lee Bieber AF6VN
wlfraed@ix.netcom.com HTTP://wlfraed.home.netcom.com/

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