Browse files

Added an SRID_CACHE to GeoDjango db/models/fields/ so that…

… we only hit the spatial_ref_sys table once per SRID per process

git-svn-id: bcc190cf-cafb-0310-a4f2-bffc1f526a37
  • Loading branch information...
adrianholovaty committed Apr 10, 2009
1 parent bb75efc commit fd443959df59be304a02a4de9ad93f89fab2cc4b
Showing with 7 additions and 1 deletion.
  1. +7 −1 django/contrib/gis/db/models/fields/
@@ -13,6 +13,10 @@ def deprecated_property(func):
warn('This attribute has been deprecated, please use "%s" instead.' % func.__name__[1:])
return property(func)
+# Local cache of the spatial_ref_sys table, which holds static data.
+# This exists so that we don't have to hit the database each time.
class GeometryField(SpatialBackend.Field):
"The base GIS field -- maps to the OpenGIS Specification Geometry type."
@@ -60,7 +64,9 @@ def __init__(self, verbose_name=None, srid=4326, spatial_index=True, dim=2, **kw
super(GeometryField, self).__init__(**kwargs) # Calling the parent initializtion function
def _populate_srid_info(self):
- self._units_cache, self._units_name_cache, self._spheroid_cache = get_srid_info(self.srid)
+ if self.srid not in SRID_CACHE:
+ SRID_CACHE[self.srid] = get_srid_info(self.srid)
+ self._units_cache, self._units_name_cache, self._spheroid_cache = SRID_CACHE[self.srid]
def _get_units(self):
if self._units_cache is None:

0 comments on commit fd44395

Please sign in to comment.