摘要：
1.null[True or False]2.blank[True or False]3.choicesfrom django.db import modelsclass Person(models.Model): GENDER_CHOICES = ( (u'M', u'Male'), (u'F', u'Female'), ) name = models.CharField(max_length=60) gender = models.CharField(max_length=2, choices=GENDER_CHOICES)4 阅读全文
