GeoDjango通过Coords查询PointField

Question

是否可以通过PointField的lng，lat值查询Django模型？

<---example--->

Foo.objects.filter(bar=(-73, 34)) 

## bar == name of PointField in the django model.
## -73 == longitude
## 34 == latitude

Answer 1

用坐标检查精确匹配可能不是一个好主意。您应该使用距提供的坐标的距离进行查询。无论如何，您都可以做。根据文档，您可以在PointField上执行许多查找。您可以像这样使用距离过滤器-

>>> from django.contrib.gis.geos import *
>>> from django.contrib.gis.measure import D # ``D`` is a shortcut for ``Distance``
>>> from geoapp import SouthTexasCity
# Distances will be calculated from this point, which does not have to be projected.
>>> pnt = fromstr('POINT(-96.876369 29.905320)', srid=4326)
# If numeric parameter, units of field (meters in this case) are assumed.
>>> qs = SouthTexasCity.objects.filter(point__distance_lte=(pnt, 7000))
# Find all Cities within 7 km, > 20 miles away, and > 100 chains  away (an obscure unit)
>>> qs = SouthTexasCity.objects.filter(point__distance_lte=(pnt, D(km=7)))
>>> qs = SouthTexasCity.objects.filter(point__distance_gte=(pnt, D(mi=20)))
>>> qs = SouthTexasCity.objects.filter(point__distance_gte=(pnt, D(chain=100)))

同样，您可以执行exact查找。