如果不创建表单,我可以在Django中创建一个不需要的管理字段吗？

Question

每次我在Django的Admin部分输入一个新的播放器时,我都会收到一条错误消息,上面写着"此字段是必需的".

有没有办法在不创建自定义表单的情况下使字段不需要？我可以在models.py或admin.py中执行此操作吗？

这是我在models.py中看到的类.

class PlayerStat(models.Model):
    player = models.ForeignKey(Player)

    rushing_attempts = models.CharField(
        max_length = 100,
        verbose_name = "Rushing Attempts"
        )
    rushing_yards = models.CharField(
        max_length = 100,
        verbose_name = "Rushing Yards"
        )
    rushing_touchdowns = models.CharField(
        max_length = 100,
        verbose_name = "Rushing Touchdowns"
        )
    passing_attempts = models.CharField(
        max_length = 100,
        verbose_name = "Passing Attempts"
        )

谢谢

Answer 1

放

blank=True

在你的模型中,即:

rushing_attempts = models.CharField(
        max_length = 100,
        verbose_name = "Rushing Attempts",
        blank=True
        )

Answer 2

使用blank = True,null = True

class PlayerStat(models.Model):
    player = models.ForeignKey(Player)

    rushing_attempts = models.CharField(
        max_length = 100,
        verbose_name = "Rushing Attempts",
        blank=True,
        null=True
        )
    rushing_yards = models.CharField(
        max_length = 100,
        verbose_name = "Rushing Yards",
        blank=True,
        null=True
        )
    rushing_touchdowns = models.CharField(
        max_length = 100,
        verbose_name = "Rushing Touchdowns",
        blank=True,
        null=True
        )
    passing_attempts = models.CharField(
        max_length = 100,
        verbose_name = "Passing Attempts",
        blank=True,
        null=True
        )

Answer 3

如果该字段在模型级别设置为空白，则实际上意味着允许空字符串。空字符串和 null 实际上不是同一件事。不要仅仅因为框架设置了一些不好的默认功能而破坏数据完整性。

不要设置空白，而是重写 get_form 方法：

    def get_form(self, request, obj=None, **kwargs):
        form = super().get_form(request, obj, **kwargs)
        form.base_fields["rushing_attempts"].required = False