Fixed #16231 -- Added support for GML and KML on the SpatiaLite backend. …

Fixed #16231 -- Added support for GML and KML on the SpatiaLite backend.  Thanks, steko for the bug report and jpaulett for the patch.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@16800 bcc190cf-cafb-0310-a4f2-bffc1f526a37

AUTHORS

@@ -393,6 +393,7 @@ answer newbie questions, and generally made Django that much better:
     Jay Parlar <parlar@gmail.com>
     Claude Paroz <claude@2xlibre.net>
     Carlos Eduardo de Paula <carlosedp@gmail.com>
+    John Paulett <john@paulett.org>
     pavithran s <pavithran.s@gmail.com>
     Barry Pederson <bp@barryp.org>
     Andreas Pelme <andreas@pelme.se>

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

@@ -133,6 +133,18 @@ class SpatiaLiteOperations(DatabaseOperations, BaseSpatialOperations):
         gis_terms += self.geometry_functions.keys()
         self.gis_terms = dict([(term, None) for term in gis_terms])
 
+        if version >= (2, 4, 0):
+            # Spatialite 2.4.0-RC4 added AsGML and AsKML, however both
+            # RC2 (shipped in popular Debian/Ubuntu packages) and RC4
+            # report version as '2.4.0', so we fall back to feature detection
+            try:
+                self._get_spatialite_func("AsGML(GeomFromText('POINT(1 1)'))")
+                self.gml = 'AsGML'
+                self.kml = 'AsKML'
+            except DatabaseError:
+                # we are using < 2.4.0-RC4
+                pass
+
     def check_aggregate_support(self, aggregate):
         """
         Checks if the given aggregate name is supported (that is, if it's

django/contrib/gis/tests/geoapp/tests.py

 import re
 from django.db import connection
+from django.db.utils import DatabaseError
 from django.contrib.gis import gdal
 from django.contrib.gis.geos import (fromstr, GEOSGeometry,
     Point, LineString, LinearRing, Polygon, GeometryCollection)
@@ -92,8 +93,8 @@ class GeoModelTest(TestCase):
 
     def test03a_kml(self):
         "Testing KML output from the database using GeoQuerySet.kml()."
-        # Only PostGIS supports KML serialization
-        if not postgis:
+        # Only PostGIS and Spatialite (>=2.4.0-RC4) support KML serialization
+        if not (postgis or (spatialite and connection.ops.kml)):
             self.assertRaises(NotImplementedError, State.objects.all().kml, field_name='poly')
             return
 
@@ -117,7 +118,7 @@ class GeoModelTest(TestCase):
 
     def test03b_gml(self):
         "Testing GML output from the database using GeoQuerySet.gml()."
-        if mysql or spatialite:
+        if mysql or (spatialite and not connection.ops.gml) :
             self.assertRaises(NotImplementedError, Country.objects.all().gml, field_name='mpoly')
             return
 
@@ -131,12 +132,15 @@ class GeoModelTest(TestCase):
         if oracle:
             # No precision parameter for Oracle :-/
             gml_regex = re.compile(r'^<gml:Point srsName="SDO:4326" xmlns:gml="http://www.opengis.net/gml"><gml:coordinates decimal="\." cs="," ts=" ">-104.60925\d+,38.25500\d+ </gml:coordinates></gml:Point>')
-            for ptown in [ptown1, ptown2]:
-                self.assertTrue(gml_regex.match(ptown.gml))
+        elif spatialite:
+            # Spatialite has extra colon in SrsName
+            gml_regex = re.compile(r'^<gml:Point SrsName="EPSG::4326"><gml:coordinates decimal="\." cs="," ts=" ">-104.609251\d+,38.255001</gml:coordinates></gml:Point>')
         else:
             gml_regex = re.compile(r'^<gml:Point srsName="EPSG:4326"><gml:coordinates>-104\.60925\d+,38\.255001</gml:coordinates></gml:Point>')
-            for ptown in [ptown1, ptown2]:
-                self.assertTrue(gml_regex.match(ptown.gml))
+
+        for ptown in [ptown1, ptown2]:
+            self.assertTrue(gml_regex.match(ptown.gml))
+
 
     def test03c_geojson(self):
         "Testing GeoJSON output from the database using GeoQuerySet.geojson()."

docs/ref/contrib/gis/db-api.txt

@@ -287,9 +287,9 @@ Method                                PostGIS  Oracle  SpatiaLite
 :meth:`GeoQuerySet.force_rhr`         X
 :meth:`GeoQuerySet.geohash`           X
 :meth:`GeoQuerySet.geojson`           X
-:meth:`GeoQuerySet.gml`               X        X
+:meth:`GeoQuerySet.gml`               X        X       X
 :meth:`GeoQuerySet.intersection`      X        X       X
-:meth:`GeoQuerySet.kml`               X
+:meth:`GeoQuerySet.kml`               X                X
 :meth:`GeoQuerySet.length`            X        X       X
 :meth:`GeoQuerySet.make_line`         X
 :meth:`GeoQuerySet.mem_size`          X

docs/ref/contrib/gis/geoquerysets.txt

@@ -982,7 +982,7 @@ __ http://geojson.org/
 
 .. method:: GeoQuerySet.gml(**kwargs)
 
-*Availability*: PostGIS, Oracle
+*Availability*: PostGIS, Oracle, SpatiaLite
 
 Attaches a ``gml`` attribute to every model in the queryset that contains the
 `Geographic Markup Language (GML)`__ representation of the geometry.
@@ -1013,7 +1013,7 @@ __ http://en.wikipedia.org/wiki/Geography_Markup_Language
 
 .. method:: GeoQuerySet.kml(**kwargs)
 
-*Availability*: PostGIS
+*Availability*: PostGIS, SpatiaLite
 
 Attaches a ``kml`` attribute to every model in the queryset that contains the
 `Keyhole Markup Language (KML)`__ representation of the geometry fields. It