Fixed #26509 -- Deprecated the contrib.gis.utils.precision_wkt() function.

django/contrib/gis/utils/wkt.py

 """
  Utilities for manipulating Geometry WKT.
 """
+import warnings
 
 from django.utils import six
+from django.utils.deprecation import RemovedInDjango20Warning
 
 
 def precision_wkt(geom, prec):
@@ -21,6 +23,11 @@ def precision_wkt(geom, prec):
     If the precision is a string, it must be valid Python format string
     (e.g., '%20.7f') -- thus, you should know what you're doing.
     """
+    warnings.warn(
+        "precision_wkt() is deprecated in favor of the WKTWriter class.",
+        RemovedInDjango20Warning, stacklevel=2
+    )
+
     if isinstance(prec, int):
         num_fmt = '%%.%df' % prec
     elif isinstance(prec, six.string_types):

docs/internals/deprecation.txt

@@ -158,6 +158,8 @@ details on these changes.
 
 * The ``javascript_catalog()`` and ``json_catalog()`` views will be removed.
 
+* The ``django.contrib.gis.utils.precision_wkt()`` function will be removed.
+
 .. _deprecation-removed-in-1.10:
 
 1.10

docs/releases/1.10.txt

@@ -796,6 +796,9 @@ wish to support earlier versions of Django.
   :class:`~django.contrib.gis.geos.MultiPolygon` is deprecated in favor of the
   :attr:`~django.contrib.gis.geos.GEOSGeometry.unary_union` property.
 
+* The ``django.contrib.gis.utils.precision_wkt()`` function is deprecated in
+  favor of :class:`~django.contrib.gis.geos.WKTWriter`.
+
 ``CommaSeparatedIntegerField`` model field
 ------------------------------------------
 

tests/gis_tests/test_wkt.py

+from unittest import skipUnless
+
+from django.contrib.gis.geos import HAS_GEOS, GEOSGeometry
+from django.contrib.gis.utils.wkt import precision_wkt
+from django.test import SimpleTestCase, ignore_warnings
+from django.utils.deprecation import RemovedInDjango20Warning
+
+
+@skipUnless(HAS_GEOS, "Requires GEOS support")
+class WktTest(SimpleTestCase):
+
+    @ignore_warnings(category=RemovedInDjango20Warning)
+    def test_wkt(self):
+        point = GEOSGeometry('POINT (951640.547328465 4219369.26171664)')
+        self.assertEqual('POINT(951640.547328 4219369.261717)', precision_wkt(point, 6))
+        self.assertEqual('POINT(951640.5473 4219369.2617)', precision_wkt(point, '%.4f'))
+
+        multipoint = GEOSGeometry(
+            "SRID=4326;MULTIPOINT((13.18634033203125 14.504356384277344),"
+            "(13.207969665527 14.490966796875),(13.177070617675 14.454917907714))"
+        )
+        self.assertEqual(
+            "MULTIPOINT(13.186340332031 14.504356384277,"
+            "13.207969665527 14.490966796875,13.177070617675 14.454917907714)",
+            precision_wkt(multipoint, 12)
+        )