choice参数

choices = (
(1,'male'),
(2,'female'),
(3,'others')
)
gender = models.IntegerField(choices=choices)
"""
1.如果我存的是上面元组中数字会怎么样
2.如果我存的数字不在元组范围内又会怎样
1.数字没有对应关系 是可以存的
"""

    from app01 import models
    user_obj = models.Userinfo.objects.filter(pk=4).first()
    print(user_obj.username)
    print(user_obj.gender)
    # 针对choices字段 如果你想要获取数字所对应的中文 你不能直接点字段
    # 固定句式   数据对象.get_字段名_display()  当没有对应关系的时候 该句式获取到的还是数字
    print(user_obj.get_gender_display())
    record_choices = (('checked', "已签到"),
                  ('vacate', "请假"),
                  ('late', "迟到"),
                  ('noshow', "缺勤"),
                  ('leave_early', "早退"),
                  )
    record = models.CharField("上课纪录", choices=record_choices, default="checked",
        
    score_choices = ((100, 'A+'),
                 (90, 'A'),
                 (85, 'B+'),
                 (80, 'B'),
                 (70, 'B-'),
                 (60, 'C+'),
                 (50, 'C'),
                 (40, 'C-'),
                 (0, ' D'),
                 (-1, 'N/A'),
                 (-100, 'COPY'),
                 (-1000, 'FAIL'),
                 )
    score = models.IntegerField("本节成绩", choices=score_choices, default=-1)

MTV与MVC模型

​ django号称是MTV框架,其实他还是MVC框架
​ MTV:
​ M:models
​ T: templates
​ V: views
​ MVC:
​ M:models
​ V: views
​ C: contronner(路由匹配)

01-05 11:12