Denes,
> The auto-complete part was not mentioned in this thread but it should
> be OK as per your logic, except for the extreme case where the
> selected postcoderegio is deleted while the form is being shown.
I guess it is best to take this extreme case into account, the code
now reads:
if form.accepts(request.vars,session):
minmax=db
(db.postcoderegio.regio==request.vars.postcoderegio).select
(db.postcoderegio.codemin,db.postcoderegio.codemax)
if minmax:
minimum=int(minmax[0].codemin)
maximum=int(minmax[0].codemax)
clubs=db((db.bedrijf.id==db.adres.bedrijf)&
(db.bedrijf.id==db.bedrijfinschrijving.bedrijf)&\
(db.adres.postcode_cijferdeel>=minimum)&
(db.adres.postcode_cijferdeel<=maximum)\
&(db.adres.adressoort=='vestigingsadres')&
(db.bedrijfinschrijving.inschrijving=='fitnessclub'))\
.select
(db.bedrijf.id,db.bedrijf.bedrijfsnaam,db.bedrijf.status,db.adres.straat,
\
db.adres.plaats,orderby=db.bedrijf.status|
db.bedrijf.bedrijfsnaam)
else:
response.flash='Please provide a valid postal code'
clubs=[]
> In Python the following are considered to be False:
> 1) None
> 2) False
> 3) zero of any numeric type, for example, 0, 0L, 0.0, 0j
> 4) any empty sequence, for example, '', (), []
> 5) any empty mapping, for example, {}
> 6) instances of user-defined classes, if the class defines a
> __nonzero__() or __len__() method, when that method returns the
> integer zero or bool value False
>
> so you could check minmax's "emptyness" using:
> if minmax:
> # it is not empty
> else:
> # it is empty (see 4 above)
Thanks I added this to my log.
> but your code using len() is fine too.
But not as beautiful as:
if minmax: ...
else: ...
Best regards,
Annet.
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