google app engine - regarding models choices in django -

is there way if choice removed model choices should automatically delete entry in db too.

like

class student(models.model):     freshman = 'fr'     sophomore = 'so'     junior = 'jr'     senior = 'sr'     year_in_school_choices = (         (freshman, 'freshman'),         (sophomore, 'sophomore'),         (junior, 'junior'),         (senior, 'senior'),     )     year_in_school = models.charfield(max_length=2,                                       choices=year_in_school_choices,                                       default=freshman) 

now have removed (junior, 'junior') choice list. in student table should delete records junior.

i using appengine release. there chance check while deploying appengine application , send change db ?

any appreciate it.

no. south data migration.