def get_fuel_burn(self):
"""
Return the fuel burn for this flight as a FuelBurn object. If the
flight has no fuel burn info, then create the object from the plane's
default
"""
mileage = self.route.total_line_all
fb = self.fuel_burn
if not fb:
fb = getattr(self.plane, "fuel_burn", None)
return FuelBurn(time=self.total, input=fb, mileage=mileage)
def calc_fuel(self):
"""
Calculated the `gallons` and `mpg` database fields. It tries to use
the fuel_burn value opn the flight but falls back to using the value
associated with the plane if no value is present.
"""
distance = self.route.total_line_all
if self.fuel_burn or self.plane.fuel_burn:
if self.fuel_burn:
fb = FuelBurn(input=self.fuel_burn,
time=self.total,
mileage=distance)
else:
fb = FuelBurn(input=self.plane.fuel_burn,
time=self.total,
mileage=distance)
self.gallons = fb.as_unit('gallons', for_db=True)
self.gph = fb.as_unit('gph', for_db=True)
self.mpg = fb.as_unit('mpg', for_db=True)