Question

假设类照片用于保存包含选项字段和其他属性的照片：

class Photo(models.Model):
    ONLYME = 'O'
    FRIENDS = 'F'
    PUBLIC = 'P'
    CHOICES = (
        (ONLYME, "Me"),
        (FRIENDS, "Friends"),
        (PUBLIC, "Public"),
    )

    display = models.CharField(max_length=1, choices=CHOICES, blank=True, null=True)
    user = models.ForeignKey(User)
    description = models.TextField()
    pub_date = models.DateTimeField(auto_now=True, auto_now_add=False)
    update = models.DateTimeField(auto_now=False, auto_now_add=True)
    image = models.ImageField(upload_to=get_upload_file_name, blank=True)

现在，如何在display属性中将照片的默认值或初始值设置为“朋友”？

Answer 1

使用default属性：

display = models.CharField(..., default=FRIENDS)

或

display = models.CharField(..., default=CHOICES[1][1])

Answer 2

您可以设置默认属性：

display = models.CharField(default='F', max_length=1, choices=CHOICES, blank=True, null=True)

Reference

django选择字段的默认值

2 个答案: