From 6fb9424ff034b45cee3f16eafda3e4629545ce4f Mon Sep 17 00:00:00 2001
From: Sergey Fedoseev <fedoseev.sergey@gmail.com>
Date: Thu, 29 Oct 2015 16:14:43 +0500
Subject: [PATCH] [1.9.x] Fixed #25631 -- Fixed support detection for some DB
 functions in SpatiaLite backend.

---
 django/contrib/gis/db/backends/spatialite/operations.py | 6 ++++++
 docs/ref/contrib/gis/functions.txt                      | 6 +++---
 2 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/django/contrib/gis/db/backends/spatialite/operations.py b/django/contrib/gis/db/backends/spatialite/operations.py
index 6dc5048b1b..127ea7b15d 100644
--- a/django/contrib/gis/db/backends/spatialite/operations.py
+++ b/django/contrib/gis/db/backends/spatialite/operations.py
@@ -93,6 +93,12 @@ class SpatiaLiteOperations(BaseSpatialOperations, DatabaseOperations):
     @cached_property
     def unsupported_functions(self):
         unsupported = {'BoundingCircle', 'ForceRHR', 'GeoHash', 'MemSize'}
+        if not self.gml:
+            unsupported.add('AsGML')
+        if not self.kml:
+            unsupported.add('AsKML')
+        if self.spatial_version < (3, 0, 0):
+            unsupported.add('AsGeoJSON')
         if self.spatial_version < (3, 1, 0):
             unsupported.add('SnapToGrid')
         if self.spatial_version < (4, 0, 0):
diff --git a/docs/ref/contrib/gis/functions.txt b/docs/ref/contrib/gis/functions.txt
index f6e8f5e497..d709696b37 100644
--- a/docs/ref/contrib/gis/functions.txt
+++ b/docs/ref/contrib/gis/functions.txt
@@ -52,7 +52,7 @@ AsGeoJSON
 
 .. class:: AsGeoJSON(expression, bbox=False, crs=False, precision=8, **extra)
 
-*Availability*: PostGIS, SpatiaLite
+*Availability*: PostGIS, SpatiaLite (≥ 3.0)
 
 Accepts a single geographic field or expression and returns a `GeoJSON
 <http://geojson.org/>`_ representation of the geometry. Note that the result is
@@ -84,7 +84,7 @@ AsGML
 
 .. class:: AsGML(expression, version=2, precision=8, **extra)
 
-*Availability*: Oracle, PostGIS, SpatiaLite
+*Availability*: Oracle, PostGIS, SpatiaLite (≥ 2.4.0-RC4)
 
 Accepts a single geographic field or expression and returns a `Geographic Markup
 Language (GML)`__ representation of the geometry.
@@ -115,7 +115,7 @@ AsKML
 
 .. class:: AsKML(expression, precision=8, **extra)
 
-*Availability*: PostGIS, SpatiaLite
+*Availability*: PostGIS, SpatiaLite (≥ 2.4.0-RC4)
 
 Accepts a single geographic field or expression and returns a `Keyhole Markup
 Language (KML)`__ representation of the geometry.