GeoDjango查询PointField by coords

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

检查与坐标的精确匹配可能不是一个好主意。您应该查询距离所提供坐标的距离。无论如何，你可以做到这两点。 From the documentation，您可以在PointField上执行many lookups。您可以使用这样的距离过滤器 -

>>> 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。