null=True, on_delete=models.SET_NULL)
professor = ForeignKey(Professor, related_name='stations', verbose_name='professor',
null=True, on_delete=models.SET_NULL)
- professor_free = CharField(_(professor), max_length=255, blank=True)
+ professor_free = CharField(_('professor'), max_length=255, blank=True)
comment = TextField(_('comment'), blank=True)
started = BooleanField(_('started'))
datetime_start = DateTimeField(_('time_start'), blank=True, null=True)