title: Get Foreign Key Value
body: <p>How can I get the foreign key values?  I have a common vehicle model that links to the year, series, engine type, body style, transmission and drive train...all as foreign keys.  I'd like to get the values of these fields for my app, but I'm stuck as to how I'd go about them.  Any ideas will be highly appreciated.</p>
  
  <pre><code>class Model(models.Model):
  
    model = models.CharField(max_length=15, blank=False)
    manufacturer = models.ForeignKey(Manufacturer)
    date_added = models.DateField()
    def __unicode__(self):
        name = ''+str(self.manufacturer)+" "+str(self.model)
        return name 
  
  
  class Year(models.Model):
  
    ALPHA_NUMERIC_CHOICES = (
        ('1', 'Numeric'),
        ('A', 'Alphabetic'),
    )
  
    year = models.PositiveSmallIntegerField()
    position_7_char = models.CharField(max_length=1, choices=ALPHA_NUMERIC_CHOICES)
    position_10 = models.CharField(max_length=1, blank=False)
  
    def __unicode__(self):
        return unicode(self.year)
  
  
  class Series(models.Model):
  
    series = models.CharField(max_length=20, blank=True)
    model = models.ForeignKey(Model)
    date_added = models.DateField()
  
    def __unicode__(self):
        name = str(self.model)+" "+str(self.series)
        return name
  
  
  class CommonVehicle(models.Model):
  
    year = models.ForeignKey(Year)
    series = models.ForeignKey(Series)
    engine = models.ForeignKey(Engine)
    body_style = models.ForeignKey(BodyStyle)
    transmission = models.ForeignKey(Transmission)
    drive_train = models.ForeignKey(DriveTrain)
  
    def __unicode__(self):
        name = ''+str(self.year)+" "+str(self.series)
        return name
  
  
  class Vehicle(models.Model):
  
    stock_number = models.CharField(max_length=6, blank=False)
    vin = models.CharField(max_length=17, blank=False)
    common_vehicle = models.ForeignKey(CommonVehicle)
    exterior_colour = models.ForeignKey(ExteriorColour)
    interior_colour = models.ForeignKey(InteriorColour)
    interior_type = models.ForeignKey(InteriorType)
    odometer_unit = models.ForeignKey(OdometerUnit)
    status = models.ForeignKey(Status)
    odometer_reading = models.PositiveIntegerField()
    selling_price = models.PositiveIntegerField()
    purchase_date = models.DateField()
    sales_description = models.CharField(max_length=60, blank=False)
  
    def __unicode__(self):
        return self.stock_numberodels.ForeignKey(CommonVehicle)
  </code></pre>