Commit fd443959 authored by Adrian Holovaty's avatar Adrian Holovaty
Browse files

Added an SRID_CACHE to GeoDjango db/models/fields/__init__.py so that we only... 

Added an SRID_CACHE to GeoDjango db/models/fields/__init__.py so that we only hit the spatial_ref_sys table once per SRID per process

git-svn-id: http://code.djangoproject.com/svn/django/trunk@10488 bcc190cf-cafb-0310-a4f2-bffc1f526a37
parent bb75efc0

django/contrib/gis/db/models/fields/__init__.py

+7 −1
Original line number Diff line number Diff line
@@ -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.

SRID_CACHE = {}



class GeometryField(SpatialBackend.Field):

    "The base GIS field -- maps to the OpenGIS Specification Geometry type."
@@ -60,7 +64,9 @@ class GeometryField(SpatialBackend.Field): 
        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: