class Area(OracleToleranceMixin, GeoFunc):
arity = 1
def as_sql(self, compiler, connection):
if connection.ops.geography:
# Geography fields support area calculation, returns square meters.
self.output_field = AreaField('sq_m')
elif not self.output_field.geodetic(connection):
# Getting the area units of the geographic field.
units = self.output_field.units_name(connection)
if units:
self.output_field = AreaField(
AreaMeasure.unit_attname(
self.output_field.units_name(connection)))
else:
self.output_field = FloatField()
else:
# TODO: Do we want to support raw number areas for geodetic fields?
raise NotImplementedError(
'Area on geodetic coordinate systems not supported.')
return super(Area, self).as_sql(compiler, connection)
def as_oracle(self, compiler, connection):
self.output_field = AreaField(
'sq_m') # Oracle returns area in units of meters.
return super(Area, self).as_oracle(compiler, connection)
class Area(OracleToleranceMixin, GeoFunc):
def as_sql(self, compiler, connection):
if connection.ops.geography:
# Geography fields support area calculation, returns square meters.
self.output_field = AreaField('sq_m')
elif not self.output_field.geodetic(connection):
# Getting the area units of the geographic field.
units = self.output_field.units_name(connection)
if units:
self.output_field = AreaField(
AreaMeasure.unit_attname(self.output_field.units_name(connection))
)
else:
self.output_field = FloatField()
else:
# TODO: Do we want to support raw number areas for geodetic fields?
raise NotImplementedError('Area on geodetic coordinate systems not supported.')
return super(Area, self).as_sql(compiler, connection)
def as_oracle(self, compiler, connection):
self.output_field = AreaField('sq_m') # Oracle returns area in units of meters.
return super(Area, self).as_oracle(compiler, connection)
from decimal import Decimal
