Django - Getting specific data from model - django

Question

I'm trying to make a booking system (for apartments). The idea is that users can pick a start date and an end date and book the apartment if it isnt alrdy booked.
I have a Reservation model with a "start_date" and a "end_date" that I use to determine the dates for the apartment booking.
Users the JQuery Ui Date Picker (a small calendar) to pick dates. The "unavailable" dates are grayed out.
This is how I did that :
<script type="text/javascript">
var unavailableDates = ['{{ reservation.all.0.start_date|date:"d-m-Y" }}', '{{ reservation.all.0.end_date|date:"d-m-Y" }}'];
console.log(unavailableDates);
function unavailable(date) {
dmy = date.getDate() + "-" + (date.getMonth() + 1) + "-" + date.getFullYear();
if ($.inArray(dmy, unavailableDates) == -1) {
return [true, ""];
} else {
return [false, "", "Unavailable"];
}
}
$(function () {
$("#datepicker").datepicker({
dateFormat: 'MM-dd-yy',
beforeShowDay: unavailable
});
});
</script>
I am using ...
{{ reservation.all.0.start_date|date:"d-m-Y" }}
...to gray out the date in the calendar.
My reservation model looks like this:
class Reservation(models.Model):
apartment = models.ForeignKey(Apartment, related_name='reservations',
on_delete=models.CASCADE, blank=True, null=True)
start_date = models.DateField(blank=True, null=True, unique=True)
end_date = models.DateField(blank=True, null=True, unique=True)
name = models.CharField(default="", max_length=200, unique=True)
def __str__(self):
return self.name
And in my view I have:
def apartment_view(request, apartment_id):
reservation = Reservation.objects.filter(apartment__pk=apartment_id)
apartment = get_object_or_404(Apartment, pk=apartment_id)
context = {'apartment': apartment, }
form = ReservationForm()
if request.method == 'GET':
form = ReservationForm()
elif request.method == 'POST':
form = ReservationForm(request.POST)
if form.is_valid():
reservation = form.save(commit=False)
reservation.apartment = apartment
reservation.save()
form.save()
return HttpResponseRedirect('/booking/')
args = {}
args['form'] = form
args['apartment'] = context
args['reservation'] = reservation
return render(request, 'booking/apartment.html', args)
Since I need my reservations to be filtered to the correct apartment.
My question is, how can I query for ALL dates related to an apartment, both start and end dates ?
So I need all dates for apartment 1, then all dates for apartment2...etc.
I'm not sure how to go on about this, I apologize if the post is confusing.
Thanks !!!

Answer 1

Later edit:
After looking at your JS code you might wanna do something like this in your view:
import itertools
unavailable_dates = apartment.reservations.values_list('start_date', 'end_date')
context['unavailable_dates'] = list(itertools.chain(*unavailable_dates)) # to convert _list_ of tuples to simple list
You can get start/end dates for reservations linked to an apartment like this:
apartment = get_object_or_404(Apartment, pk=apartment_id)
context['appartment_reservations_dates'] = apartment.reservations.values_list('start_date', 'end_date')
If you want to work with the entire Reservation object directly in your HTML template you can do it like this:
{% for reservation in apartment.reservation.all %}
{{ reservation.start_date }} - {{ reservation.end_date }}
{% endfor %}
Your view might look like this:
def apartment_view(request, apartment_id):
context = dict()
context['apartment'] = get_object_or_404(Apartment, pk=apartment_id)
context['reservations'] = apartment.reservations.all() # if you want all existing reservations for this specific appartment
form = ReservationForm()
if request.method == 'GET':
form = ReservationForm()
elif request.method == 'POST':
form = ReservationForm(request.POST)
if form.is_valid(): # you can add extra validation here making sure whoever tries to book is booking for an available time interval
reservation = form.save(commit=False)
reservation.apartment = apartment
reservation.save()
form.save()
return HttpResponseRedirect('/booking/')
context['form'] = form
return render(request, 'booking/apartment.html', args)