django 选择字段的默认值 [英] default value for django choice field

问题描述

假设 class Photo 是保存具有选择字段和其他属性的照片:

Suppose class Photo is to hold photos having choice fields and other attributes:

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"?

Now, how do I set the default or initial value of a photo to 'Friends' in the display attribute?

推荐答案

使用default 属性:

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

或

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

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