Python backend.GeometryException方法代码示例

# 需要导入模块: from django.contrib.gis.geometry import backend [as 别名]
# 或者: from django.contrib.gis.geometry.backend import GeometryException [as 别名]
def get_prep_value(self, value):
        """
        Spatial lookup values are either a parameter that is (or may be
        converted to) a geometry, or a sequence of lookup values that
        begins with a geometry.  This routine will setup the geometry
        value properly, and preserve any other lookup parameters before
        returning to the caller.
        """
        value = super(GeometryField, self).get_prep_value(value)
        if isinstance(value, Expression):
            return value
        elif isinstance(value, (tuple, list)):
            geom = value[0]
            seq_value = True
        else:
            geom = value
            seq_value = False

        # When the input is not a GEOS geometry, attempt to construct one
        # from the given string input.
        if isinstance(geom, Geometry):
            pass
        elif isinstance(geom, (bytes, six.string_types)) or hasattr(geom, '__geo_interface__'):
            try:
                geom = Geometry(geom)
            except GeometryException:
                raise ValueError('Could not create geometry from lookup value.')
        else:
            raise ValueError('Cannot use object with type %s for a geometry lookup parameter.' % type(geom).__name__)

        # Assigning the SRID value.
        geom.srid = self.get_srid(geom)

        if seq_value:
            lookup_val = [geom]
            lookup_val.extend(value[1:])
            return tuple(lookup_val)
        else:
            return geom 

# 需要导入模块: from django.contrib.gis.geometry import backend [as 别名]
# 或者: from django.contrib.gis.geometry.backend import GeometryException [as 别名]
def get_prep_value(self, value):
        """
        Spatial lookup values are either a parameter that is (or may be
        converted to) a geometry, or a sequence of lookup values that
        begins with a geometry.  This routine will setup the geometry
        value properly, and preserve any other lookup parameters before
        returning to the caller.
        """
        if isinstance(value, SQLEvaluator):
            return value
        elif isinstance(value, (tuple, list)):
            geom = value[0]
            seq_value = True
        else:
            geom = value
            seq_value = False

        # When the input is not a GEOS geometry, attempt to construct one
        # from the given string input.
        if isinstance(geom, Geometry):
            pass
        elif isinstance(geom, (bytes, six.string_types)) or hasattr(geom, '__geo_interface__'):
            try:
                geom = Geometry(geom)
            except GeometryException:
                raise ValueError('Could not create geometry from lookup value.')
        else:
            raise ValueError('Cannot use object with type %s for a geometry lookup parameter.' % type(geom).__name__)

        # Assigning the SRID value.
        geom.srid = self.get_srid(geom)

        if seq_value:
            lookup_val = [geom]
            lookup_val.extend(value[1:])
            return tuple(lookup_val)
        else:
            return geom 

# 需要导入模块: from django.contrib.gis.geometry import backend [as 别名]
# 或者: from django.contrib.gis.geometry.backend import GeometryException [as 别名]
def get_prep_value(self, value):
        """
        Spatial lookup values are either a parameter that is (or may be
        converted to) a geometry or raster, or a sequence of lookup values
        that begins with a geometry or raster. This routine sets up the
        geometry or raster value properly and preserves any other lookup
        parameters.
        """
        value = super(BaseSpatialField, self).get_prep_value(value)

        # For IsValid lookups, boolean values are allowed.
        if isinstance(value, (Expression, bool)):
            return value
        elif isinstance(value, (tuple, list)):
            obj = value[0]
            seq_value = True
        else:
            obj = value
            seq_value = False

        # When the input is not a geometry or raster, attempt to construct one
        # from the given string input.
        if isinstance(obj, Geometry):
            pass
        else:
            # Check if input is a candidate for conversion to raster or geometry.
            is_candidate = isinstance(obj, (bytes, six.string_types)) or hasattr(obj, '__geo_interface__')
            # Try to convert the input to raster.
            raster = self.get_raster_prep_value(obj, is_candidate)

            if raster:
                obj = raster
            elif is_candidate:
                try:
                    obj = Geometry(obj)
                except (GeometryException, GDALException):
                    raise ValueError("Couldn't create spatial object from lookup value '%s'." % obj)
            else:
                raise ValueError('Cannot use object with type %s for a spatial lookup parameter.' % type(obj).__name__)

        # Assigning the SRID value.
        obj.srid = self.get_srid(obj)

        if seq_value:
            lookup_val = [obj]
            lookup_val.extend(value[1:])
            return tuple(lookup_val)
        else:
            return obj 

# 需要导入模块: from django.contrib.gis.geometry import backend [as 别名]
# 或者: from django.contrib.gis.geometry.backend import GeometryException [as 别名]
def get_prep_value(self, value):
        """
        Spatial lookup values are either a parameter that is (or may be
        converted to) a geometry or raster, or a sequence of lookup values
        that begins with a geometry or raster. This routine sets up the
        geometry or raster value properly and preserves any other lookup
        parameters.
        """
        value = super(BaseSpatialField, self).get_prep_value(value)

        # For IsValid lookups, boolean values are allowed.
        if isinstance(value, (Expression, bool)):
            return value
        elif isinstance(value, (tuple, list)):
            obj = value[0]
            seq_value = True
        else:
            obj = value
            seq_value = False

        # When the input is not a geometry or raster, attempt to construct one
        # from the given string input.
        if isinstance(obj, Geometry):
            pass
        else:
            # Check if input is a candidate for conversion to raster or geometry.
            is_candidate = isinstance(obj, (bytes, six.string_types)) or hasattr(obj, '__geo_interface__')
            # With GDAL installed, try to convert the input to raster.
            raster = False
            if HAS_GDAL:
                raster = self.get_raster_prep_value(obj, is_candidate)

            if raster:
                obj = raster
            elif is_candidate:
                try:
                    obj = Geometry(obj)
                except (GeometryException, GDALException):
                    raise ValueError("Couldn't create spatial object from lookup value '%s'." % obj)
            else:
                raise ValueError('Cannot use object with type %s for a spatial lookup parameter.' % type(obj).__name__)

        # Assigning the SRID value.
        obj.srid = self.get_srid(obj)

        if seq_value:
            lookup_val = [obj]
            lookup_val.extend(value[1:])
            return tuple(lookup_val)
        else:
            return obj