widgets.py 文件源码

def get_context(self, name, value, attrs):
        context = super(BaseGeometryWidget, self).get_context(name, value, attrs)
        # If a string reaches here (via a validation error on another
        # field) then just reconstruct the Geometry.
        if value and isinstance(value, six.string_types):
            value = self.deserialize(value)

        if value:
            # Check that srid of value and map match
            if value.srid != self.map_srid:
                try:
                    ogr = value.ogr
                    ogr.transform(self.map_srid)
                    value = ogr
                except gdal.GDALException as err:
                    logger.error(
                        "Error transforming geometry from srid '%s' to srid '%s' (%s)",
                        value.srid, self.map_srid, err
                    )

        if attrs is None:
            attrs = {}

        build_attrs_kwargs = {
            'name': name,
            'module': 'geodjango_%s' % name.replace('-', '_'),  # JS-safe
            'serialized': self.serialize(value),
            'geom_type': gdal.OGRGeomType(self.attrs['geom_type']),
            'STATIC_URL': settings.STATIC_URL,
            'LANGUAGE_BIDI': translation.get_language_bidi(),
        }
        build_attrs_kwargs.update(attrs)
        context.update(self.build_attrs(self.attrs, build_attrs_kwargs))
        return context