Question

首先请看下面的代码：

Project = models.ForeignKey(Project,null=False, blank=True)
if Porject is 'A':
    Owner = models.CharField(max_length=100, choices=**owner_set_A**)
else:
    Owner = models.CharField(max_length=100, choices=**owner_set_B**)

所以所有者选择应该从owner_set_A切换到B，它依赖于Project的值。我告诉我我该怎么做感谢Timmy的回复，但我应该怎么做models.Model

class Task(models.Model):
    project = models.ForeignKey(Project,null=False, blank=True)
    if Porject is 'A':
        Owner = models.CharField(max_length=100, choices=**owner_set_A**)
    else:
        Owner = models.CharField(max_length=100, choices=**owner_set_B**)

有没有办法获得项目字段值？

Answer 1

您不需要两个单独的字段。该字段只保存数据，而您需要过滤用户在其表单中显示的choices内容。例如，如果您使用的是django管理员，则可以执行类似（未经测试的）

之类的操作

class MyModelForm(forms.ModelForm):
    def __init__(self, *args, *kwargs):
         super(MyModel, self).__init__(args, kwargs)
         if self.fields['project'].foo == "bar":
             self.fields['owner'].choices = ((0, "X"), (1, "Y"),...)
         else:
             self.fields['owner'].choices = ((0, "A"), (1, "B"),...)

    class Meta:
         model = MyModel

<强> admin.py

class MyModelAdmin(admin.ModelAdmin):
    form = MyModelForm

如何在Django中动态设置模型选择

1 个答案: