Use native geometry types on PostGIS 2.0+ instead of `AddGeometryColumn` and…

Use native geometry types on PostGIS 2.0+ instead of `AddGeometryColumn` and don't query database in `PostGISCreation.sql_table_creation_suffix`.

django/contrib/gis/db/backends/base.py

@@ -32,8 +32,9 @@ class BaseSpatialOperations(object):
     # How the geometry column should be selected.
     select = None
 
-    # Does the spatial database have a geography type?
+    # Does the spatial database have a geometry or geography type?
     geography = False
+    geometry = False
 
     area = False
     centroid = False

django/contrib/gis/db/backends/postgis/creation.py

@@ -4,7 +4,8 @@ from django.db.backends.postgresql_psycopg2.creation import DatabaseCreation
 
 class PostGISCreation(DatabaseCreation):
     geom_index_type = 'GIST'
-    geom_index_opts = 'GIST_GEOMETRY_OPS'
+    geom_index_ops = 'GIST_GEOMETRY_OPS'
+    geom_index_ops_nd = 'GIST_GEOMETRY_OPS_ND'
 
     def sql_indexes_for_field(self, model, f, style):
         "Return any spatial index creation SQL for the field."
@@ -17,8 +18,9 @@ class PostGISCreation(DatabaseCreation):
             qn = self.connection.ops.quote_name
             db_table = model._meta.db_table
 
-            if f.geography:
-                # Geogrophy columns are created normally.
+            if f.geography or self.connection.ops.geometry:
+                # Geography and Geometry (PostGIS 2.0+) columns are
+                # created normally.
                 pass
             else:
                 # Geometry columns are created by `AddGeometryColumn`
@@ -47,33 +49,23 @@ class PostGISCreation(DatabaseCreation):
                 # which are fast on multidimensional cases, or just plain
                 # gist index for the 2d case.
                 if f.geography:
-                    index_opts = ''
-                elif self.connection.ops.spatial_version >= (2, 0):
+                    index_ops = ''
+                elif self.connection.ops.geometry:
                     if f.dim > 2:
-                        index_opts = ' ' + style.SQL_KEYWORD('gist_geometry_ops_nd')
+                        index_ops = ' ' + style.SQL_KEYWORD(self.geom_index_ops_nd)
                     else:
-                        index_opts = ''
+                        index_ops = ''
                 else:
-                    index_opts = ' ' + style.SQL_KEYWORD(self.geom_index_opts)
+                    index_ops = ' ' + style.SQL_KEYWORD(self.geom_index_ops)
                 output.append(style.SQL_KEYWORD('CREATE INDEX ') +
                               style.SQL_TABLE(qn('%s_%s_id' % (db_table, f.column))) +
                               style.SQL_KEYWORD(' ON ') +
                               style.SQL_TABLE(qn(db_table)) +
                               style.SQL_KEYWORD(' USING ') +
                               style.SQL_COLTYPE(self.geom_index_type) + ' ( ' +
-                              style.SQL_FIELD(qn(f.column)) + index_opts + ' );')
+                              style.SQL_FIELD(qn(f.column)) + index_ops + ' );')
         return output
 
     def sql_table_creation_suffix(self):
-        cursor = self.connection.cursor()
-        cursor.execute('SELECT datname FROM pg_database;')
-        db_names = [row[0] for row in cursor.fetchall()]
         postgis_template = getattr(settings, 'POSTGIS_TEMPLATE', 'template_postgis')
-
-        if postgis_template in db_names:
-            qn = self.connection.ops.quote_name
-            return ' TEMPLATE %s' % qn(postgis_template)
-        elif self.connection.ops.spatial_version < (2, 0):
-            raise ImproperlyConfigured("Template database '%s' does not exist." % postgis_template)
-        else:
-            return ''
+        return ' TEMPLATE %s' % self.connection.ops.quote_name(postgis_template)

django/contrib/gis/db/backends/postgis/operations.py

@@ -103,11 +103,12 @@ class PostGISOperations(DatabaseOperations, BaseSpatialOperations):
             self.geom_func_prefix = prefix
             self.spatial_version = version
         except DatabaseError:
-            raise ImproperlyConfigured('Cannot determine PostGIS version for database "%s". '
-                                       'GeoDjango requires at least PostGIS version 1.3. '
-                                       'Was the database created from a spatial database '
-                                       'template?' % self.connection.settings_dict['NAME']
-                                       )
+            raise ImproperlyConfigured(
+                'Cannot determine PostGIS version for database "%s". '
+                'GeoDjango requires at least PostGIS version 1.3. '
+                'Was the database created from a spatial database '
+                'template?' % self.connection.settings_dict['NAME']
+                )
         # TODO: Raise helpful exceptions as they become known.
 
         # PostGIS-specific operators. The commented descriptions of these
@@ -215,6 +216,10 @@ class PostGISOperations(DatabaseOperations, BaseSpatialOperations):
                 'bboverlaps' : PostGISOperator('&&'),
                 }
 
+        # Native geometry type support added in PostGIS 2.0.
+        if version >= (2, 0, 0):
+            self.geometry = True
+
         # Creating a dictionary lookup of all GIS terms for PostGIS.
         gis_terms = ['isnull']
         gis_terms += list(self.geometry_operators)
@@ -320,6 +325,14 @@ class PostGISOperations(DatabaseOperations, BaseSpatialOperations):
                                           'only with an SRID of 4326.')
 
             return 'geography(%s,%d)'% (f.geom_type, f.srid)
+        elif self.geometry:
+            # Postgis 2.0 supports type-based geometries.
+            # TODO: Support 'M' extension.
+            if f.dim == 3:
+                geom_type = f.geom_type + 'Z'
+            else:
+                geom_type = f.geom_type
+            return 'geometry(%s,%d)' % (geom_type, f.srid)
         else:
             return None
 

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

@@ -95,7 +95,7 @@ class GeometryField(Field):
         # Is this a geography rather than a geometry column?
         self.geography = geography
 
-        # Oracle-specific private attributes for creating the entrie in
+        # Oracle-specific private attributes for creating the entry in
         # `USER_SDO_GEOM_METADATA`
         self._extent = kwargs.pop('extent', (-180.0, -90.0, 180.0, 90.0))
         self._tolerance = kwargs.pop('tolerance', 0.05)