def instances_closest_to_point(request, lat, lng):
"""
Get all the info we need about instances near a given point
Includes only public instances the user does not belong to.
If a user has been specified instances that user belongs to will
also be included in a separate list.
Unlike instance_info, this does not return the field permissions for the
instance
"""
user = request.user
user_instance_ids = []
if user and not user.is_anonymous():
user_instance_ids = InstanceUser.objects.filter(user=user)\
.values_list('instance_id', flat=True)\
.distinct()
point = Point(float(lng), float(lat), srid=4326)
try:
max_instances = int(request.GET.get('max', '10'))
if not (1 <= max_instances <= 500):
raise ValueError()
except ValueError:
raise HttpBadRequestException(
'The max parameter must be a number between 1 and 500')
try:
distance = float(
request.GET.get('distance', settings.NEARBY_INSTANCE_RADIUS))
except ValueError:
raise HttpBadRequestException(
'The distance parameter must be a number')
instances = Instance.objects \
.filter(get_mobile_instances_filter()) \
.distance(point) \
.order_by('distance')
nearby_predicate = Q(bounds__distance_lte=(point, D(m=distance)))
personal_predicate = Q(pk__in=user_instance_ids)
return {
'nearby':
_contextify_instances(
instances.filter(is_public=True).filter(nearby_predicate).exclude(
personal_predicate)[0:max_instances]),
'personal':
_contextify_instances(instances.filter(personal_predicate))
}
def instances_closest_to_point(request, lat, lng):
"""
Get all the info we need about instances near a given point
Includes only public instances the user does not belong to.
If a user has been specified instances that user belongs to will
also be included in a separate list.
Unlike instance_info, this does not return the field permissions for the
instance
"""
user = request.user
user_instance_ids = []
if user and not user.is_anonymous():
user_instance_ids = InstanceUser.objects.filter(user=user)\
.values_list('instance_id', flat=True)\
.distinct()
point = Point(float(lng), float(lat), srid=4326)
try:
max_instances = int(request.GET.get('max', '10'))
if not (1 <= max_instances <= 500):
raise ValueError()
except ValueError:
raise HttpBadRequestException(
'The max parameter must be a number between 1 and 500')
try:
distance = float(request.GET.get(
'distance', settings.NEARBY_INSTANCE_RADIUS))
except ValueError:
raise HttpBadRequestException(
'The distance parameter must be a number')
instances = Instance.objects \
.filter(get_mobile_instances_filter()) \
.distance(point) \
.order_by('distance')
nearby_predicate = Q(bounds__distance_lte=(point, D(m=distance)))
personal_predicate = Q(pk__in=user_instance_ids)
return {
'nearby': _contextify_instances(instances
.filter(is_public=True)
.filter(nearby_predicate)
.exclude(personal_predicate)
[0:max_instances]),
'personal': _contextify_instances(instances.filter(personal_predicate))
}
def public_instances(request):
return _contextify_instances(
Instance.objects.filter(is_public=True).filter(
get_mobile_instances_filter()))
def public_instances(request):
return _contextify_instances(Instance.objects
.filter(is_public=True)
.filter(get_mobile_instances_filter()))
