Fixed Oracle GIS gml() test failure introduced by e9103402; refs #18757.

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

@@ -148,6 +148,7 @@ class OracleOperations(DatabaseOperations, BaseSpatialOperations):
             'PointField', 'GeometryField', 'LineStringField',
             'PolygonField', 'MultiPointField', 'MultiLineStringField',
             'MultiPolygonField', 'GeometryCollectionField', 'GeomField',
+            'GMLField',
         )
         if internal_type in geometry_fields:
             converters.append(self.convert_textfield_value)

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

@@ -3,7 +3,7 @@ from django.db.models.query import QuerySet
 
 from django.contrib.gis.db.models import aggregates
 from django.contrib.gis.db.models.fields import get_srid_info, PointField, LineStringField
-from django.contrib.gis.db.models.sql import AreaField, DistanceField, GeomField, GeoQuery
+from django.contrib.gis.db.models.sql import AreaField, DistanceField, GeomField, GeoQuery, GMLField
 from django.contrib.gis.geometry.backend import Geometry
 from django.contrib.gis.measure import Area, Distance
 
@@ -175,6 +175,8 @@ class GeoQuerySet(QuerySet):
         if backend.postgis:
             s['procedure_fmt'] = '%(version)s,%(geo_col)s,%(precision)s'
             s['procedure_args'] = {'precision': precision, 'version': version}
+        if backend.oracle:
+            s['select_field'] = GMLField()
 
         return self._spatial_attribute('gml', s, **kwargs)
 

django/contrib/gis/db/models/sql/__init__.py

-from django.contrib.gis.db.models.sql.conversion import AreaField, DistanceField, GeomField
+from django.contrib.gis.db.models.sql.conversion import AreaField, DistanceField, GeomField, GMLField
 from django.contrib.gis.db.models.sql.query import GeoQuery
 
 __all__ = [
-    'AreaField', 'DistanceField', 'GeomField', 'GeoQuery',
+    'AreaField', 'DistanceField', 'GeomField', 'GMLField', 'GeoQuery',
 ]

django/contrib/gis/db/models/sql/conversion.py

@@ -51,3 +51,15 @@ class GeomField(BaseField):
 
     def get_internal_type(self):
         return 'GeometryField'
+
+
+class GMLField(BaseField):
+    """
+    Wrapper for GML to be used by Oracle to ensure Database.LOB conversion.
+    """
+
+    def get_internal_type(self):
+        return 'GMLField'
+
+    def from_db_value(self, value, connection):
+        return value