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change default of geometryfield / support for null values

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Laura Klünder 2017-06-26 23:23:39 +02:00
parent 769b643374
commit 0ef51ac147
1 changed files with 5 additions and 3 deletions
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8
src/c3nav/mapdata/fields.py
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@ -26,13 +26,13 @@ def validate_geometry(geometry: BaseGeometry):
class GeometryField(models.TextField):
default_validators = [validate_geometry]
def __init__(self, geomtype=None, *args, **kwargs):
def __init__(self, geomtype=None, default=None):
if geomtype == 'polyline':
geomtype = 'linestring'
if geomtype not in (None, 'polygon', 'linestring', 'point'):
raise ValueError(_('GeometryField.geomtype has to be None, "polygon", "linestring", "point"'))
self.geomtype = geomtype
super().__init__(*args, **kwargs)
super().__init__(default=default)
def deconstruct(self):
name, path, args, kwargs = super().deconstruct()
@ -46,10 +46,12 @@ class GeometryField(models.TextField):
return shape(json.loads(value))
def to_python(self, value):
if value is None:
return None
return clean_geometry(shape(json.loads(value)))
def get_prep_value(self, value):
if value == '':
if value is None:
return None
elif self.geomtype == 'polygon' and not isinstance(value, Polygon):
raise TypeError(_('Expected Polygon instance, got %s instead.') % repr(value))