python - How can I change field option in model automatically in Django? -

how can change model's field option in specific condition? example, want change option of is_it_question (editable) false via save function.

class typefourchoice(models.model):     question_choice = models.foreignkey(typefour)     is_it_question = models.booleanfield(default=false)     number = models.positiveintegerfield(blank=false, default=100, editable=false)     word_or_words = models.charfield(default='', blank=false, max_length=20)     timestamp = models.datetimefield(auto_now_add=true)      def __str__(self):         return "{} : {}".format(self.question_choice, self.word_or_words)      def save(self, *args, **kwargs):         if self.pk none , self.is_it_question:             self.number = typefourchoice.objects.filter(is_it_question=true).count() + 1             ؟؟؟؟***self.is_it_question.editable = false***????         super(typefourchoice, self).save(*args, **kwargs) 

you looking statements

self._meta.get_field_by_name('is_it_question')[0].editable = false 

but have pay attention consequences of action, read on post.