#21003: BaseGeometryWidget is not idempotent
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Reporter: leplatrem | Owner: nobody
Type: Cleanup/optimization | Status: new
Component: GIS | Version: 1.6-beta-1
Severity: Normal | Keywords:
Triage Stage: Unreviewed | Has patch: 0
Easy pickings: 1 | UI/UX: 0
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Currently, the geometry data is serialized as wkt :
https://github.com/django/django/blob/1.6b2/django/contrib/gis/forms/widgets.py#L69
https://github.com/django/django/blob/1.6b2/django/contrib/gis/templates/gis/openlayers.html#L20
And is read back here:
https://github.com/django/django/blob/1.6b2/django/contrib/gis/forms/fields.py#L95
But transform() will fail, because the instantiated Geometry won't have
any projection associated (wkt does not carry srid).
```
GEOSException at ...
Calling transform() with no SRID set is not supported
```
https://github.com/django/django/blob/1.6b2/django/contrib/gis/forms/fields.py#L96
There are several possible solutions :
* Use EWKT instead of WKT
* Add srid=self.map_srid parameter to fromstr() when instantiating
GEOSGeometry()
* Concatenate 'SRID=%s' % self.map_srid to the received data (this is
currently being done like this in JS in openlayers widget code
https://github.com/django/django/blob/1.6b2/django/contrib/gis/static/gis/js/OLMapWidget.js#L263-L273)
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Ticket URL: <https://code.djangoproject.com/ticket/21003>
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