Question

I've got an abstract model and a load of subclasses that inherit from it.

I can get a list of these subclasses but how would I go about putting them in a form so that the user can choose to create one of them?

So, for instance:-

class Abstract(models.Model):
    class Meta:
        abstract = True

class ImplA(Abstract):
    pass

class ImplB(Abstract):
    pass

I need a form which enables the user to choose to create either an instance of ImplA or an instance of ImplB.

Answer 1

您可以按照以下方式实施

首先创建一个模型来保存用户输入

SUBCLASSCHOICE = (
   ('ImplA', 'ImplA'),
   ('ImplB', 'ImplB'),
)
class UserTable(models.Model):
   abstract_class = models.CharField()
   sub_class = models.CharField(choices=SUBCLASSCHOICE)

您现在可以从UserTable获取数据并动态生成类，如下所示

models.py user_table = UserTable.objects.get（）

local()[user_table.sub_class] = type(
    user_table.sub_class, #model class name
    (user_table.abstract_class ,),
)

Django - form to create class based on type

1 个答案: