+
−"""
+
− This module provides the backend for spatial SQL construction with Django.
+
−
+
− Specifically, this module will import the correct routines and modules
+
− needed for GeoDjango to interface with the spatial database.
+
−"""
+
−from django.conf import settings
+
−from django.contrib.gis.db.backend.util import gqn
+
−
+
−# Retrieving the necessary settings from the backend.
+
−if settings.DATABASE_ENGINE == 'postgresql_psycopg2':
+
−    from django.contrib.gis.db.backend.postgis import create_spatial_db, get_geo_where_clause, SpatialBackend
+
−elif settings.DATABASE_ENGINE == 'oracle':
+
−    from django.contrib.gis.db.backend.oracle import create_spatial_db, get_geo_where_clause, SpatialBackend
+
−elif settings.DATABASE_ENGINE == 'mysql':
+
−    from django.contrib.gis.db.backend.mysql import create_spatial_db, get_geo_where_clause, SpatialBackend
+
−else:
+
−    raise NotImplementedError('No Geographic Backend exists for %s' % settings.DATABASE_ENGINE)