I have following django models :

class ModelA(models.Model) : # fld1, fld2
class ModelB(models.Model) :
    fld_a1 = models.ForeignKey(ModelA, related_name='modela_1')
    fld_a2 = models.ForeignKey(ModelA, related_name='modela_2')
    # other fields

Now when I delete resource from ModelB, how to make sure that the corresponding foreignkey objects from ModelA are also deleted