class Cars (models.Model):
    car_numb = models.CharField(max_length=20, unique=True, verbose_name=u'Номер машины')
    mirror_ign = models.NullBooleanField(null=True, verbose_name=u'Игнорировать наличия зеркала')
    date_upd = models.DateTimeField (auto_now_add=True, verbose_name=u'Дата обновления инфы')

    def __unicode__(self):
        return "%s" % (self.car_numb)

class Details (models.Model):
    car = models.ForeignKey(Cars, unique=True)
    dr_name = models.CharField(max_length=20, verbose_name=u'Имя Водителя')
    mirror = models.NullBooleanField(null=True, verbose_name = u'Наличие зеркала')
    comments = models.CharField(blank=True, max_length=100, verbose_name=u'Комментарии')
    date_upd = models.DateTimeField (auto_now_add=True, verbose_name=u'Дата обновления лога')

class DetailsAdmin(admin.ModelAdmin):
    list_display = ('car', 'Cars.mirror_ign', 'dr_name', 'mirror', 'comments', 'date_upd',)
    list_filter = ('Cars.mirror_ign', 'mirror',)
    fieldsets = (('Основное',
                  {'fields': ('car',
                              'Cars.mirror_ign',
                              'dr_name',
                              'mirror',
                              'comments',)
                  }),)
    search_fields = ['car__car_numb', 'dr_name',]


admin.site.register(Details , Details Admin)