每次我在 Django 的管理部分输入一个新播放器时,我都会收到一条错误消息,上面写着“此字段是必需的。”。
有没有一种方法可以使字段不需要创建而无需创建自定义表单?我可以在 models.py 或 admin.py 中执行此操作吗?
这是我在 models.py 中的类的样子。
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
只是放
blank=True
在您的模型中,即:
rushing_attempts = models.CharField(
max_length = 100,
verbose_name = "Rushing Attempts",
blank=True
)
使用空白=真,空=真
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
)
如果该字段在模型级别设置为空白,这实际上意味着允许空字符串。空字符串和 null 真的不是一回事。不要仅仅因为框架设置了一些不好的默认特性就破坏了你的数据完整性。
而不是设置空白,覆盖 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
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