Question

how can i specify or determine the values in my objects in python if it has this value [] or it has [<Booking: arab>],
let us say that in my queryset, i filter a value that not exist in my objects.

here is what i have done : this date_select has no data

>>> x = Booking.objects.filter(date_select='2011-12-3')
>>> print x
[]
>>> if x == None:
...  print 'none'
... 
>>> 

is it [] not equal to None?
when i try a date_select that has data

>>> x = Booking.objects.filter(date_select='2011-12-2')
>>> print x
[<Booking: arab>, <Booking: arab>, <Booking: vvv>]
>>> if x == None:
...  print 'none'
... 
>>>

i just want to determine if x has a data or not…
can anyone can give me an idea about my case?

thanks in advance

Answer 1

If you want to know if your queryset returned any results, call the exists method.

x = Booking.objects.filter(date_select='2011-12-3')
if x.exists():
   # There are some results from this query set

If you want to know how many items, you can use count

x = Booking.objects.filter(date_select='2011-12-3')
print x.count()