Question

I need to find data within a certain set of parameters
I am building a small booking system, that lets user see what vehicles are available for booking for their little safari trip.

The system has bookings that have been entered previously or made previously by a client.

If a booking’s pickup_date = 2011-03-01 and dropoff_date = 2011-03-15 and I run a query with pickup=2011-03-09 and dropoff=2011-03-14 in my views as below, it doesn’t return any results to see if a booking within that timeframe has been made.

views.py

def dates(request, template_name='groups/_dates.html'):
    pickup=request.GET.get('pickup','None');
    dropoff=request.GET.get('dropoff','None');
    order = Order.objects.filter(pick_up__lte=pickup).filter(drop_off__gte=dropoff)

    context = {'order':order,}

    return render_to_response(template_name,context,
        context_instance=RequestContext(request))

Any suggestions on how to do this?
Or should I be looking at an alternate way of running this query?

Answer 1

Could it be posible that as your passing the raw string to the queryset is not on the correct format, try converting the strings to datetime objects.

Later you can try using the range lookup is more efficient on some DB engines and more simple to read and code.

from django.db.models import Q

start_date = datetime.date(2005, 1, 1)
end_date = datetime.date(2005, 3, 31)
orders = Order.objects.filter(drop_off__gte=start_date, pick_up__lte=end_date)
# Or maybe better
orders = Order.objects.filter(Q(drop_off__gte=start_date), Q(pick_up__lte=end_date))