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treat empty geometries correctly

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This commit is contained in:
Laura Klünder 2018-12-23 19:50:53 +01:00
parent bd2a512df3
commit 7754643c4b
2 changed files with 4 additions and 0 deletions
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2
src/c3nav/mapdata/fields.py
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@ -106,6 +106,8 @@ class GeometryField(models.TextField):
if value is None: if value is None:
return None return None
self._validate_geomtype(value, exception=TypeError) self._validate_geomtype(value, exception=TypeError)
if value.is_empty:
raise Exception('Cannot save empty geometry.')
return json.dumps(self.get_final_value(value, as_json=True)) return json.dumps(self.get_final_value(value, as_json=True))
def value_to_string(self, obj): def value_to_string(self, obj):

2
src/c3nav/mapdata/utils/geometry.py
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@ -41,6 +41,8 @@ class WrappedGeometry():
@cached_property @cached_property
def wrapped_geom(self): def wrapped_geom(self):
if not self.wrapped_geojson['coordinates']:
return GeometryCollection()
return shapely_shape(self.wrapped_geojson) return shapely_shape(self.wrapped_geojson)
def __getattr__(self, name): def __getattr__(self, name):