Question

我想用相关的数据库列为Django对象添加一个字段。如果在初始化模型后设置属性，只需添加一个属性就行了，但是像往常一样，我试图让它以Django的方式工作。

class Stuff(models.Model):
    id = fields.UUIDField(primary_key=True)
    name = models.CharField(max_length=128)
    enabled = models.BooleanField(default=False)
    log_user = None

这没有任何问题。

stuff = Stuff()
stuff.log_user = current_user

这不是

stuff = Stuff(log_user=current_user)
TypeError: 'log_user' is an invalid keyword argument for this function

有没有办法让字段表现为Django方式？

Answer 1

您需要ForeignKey。

class Stuff(models.Model):
    id = fields.UUIDField(primary_key=True)
    name = models.CharField(max_length=128)
    enabled = models.BooleanField(default=False)
    log_user = models.ForeignKey('auth.User', blank=True, null=True)

Answer 2

如果您执行以下操作，构造函数将起作用：

class Stuff(models.Model):

    id = fields.UUIDField(primary_key=True)
    name = models.CharField(max_length=128)
    enabled = models.BooleanField(default=False)
    log_user = None

    def __init__(self, log_user=None, *args, **kwargs):
        super(Stuff, self).__init__(*args, **kwargs)
        self.log_user = log_user

Answer 3

Django recommend to use as a Foreign key Concept:

class Stuff(models.Model):
    id = fields.UUIDField(primary_key=True)
    name = models.CharField(max_length=128)
    enabled = models.BooleanField(default=False)
    log_user = models.ForeignKey('auth.User', blank=True, null=True)

while saving your Data you can add log_user object:
     Stuff = Stuff()
     stuff.log_user = user
     stuff.save()

Django模型字段与数据库列

3 个答案: