如何在Django-admin内联表单中显示子类模型？

Question

我在models.py中得到了一些像这样的模型：

class QuestionPackage(models.Model):
    """Question Package"""


class Question(models.Model):
    question_package = models.ManyToManyField(QuestionPackage, blank=True)
    name = models.CharField(max_length=128)
    answer = models.TextField()


class Reading(Question):
    """Reading Question"""


class Writing(Question):
    """Writing Question"""

（阅读和写作之间存在一些差异，但我省略了。）

和admin.py：

class ReadingInline(admin.TabularInline):
    model = Reading.question_package.through


class WritingInline(admin.TabularInline):
    model = Writing.question_package.through


class QuestionPackageAdmin(admin.ModelAdmin):
    inlines = [
        ReadingInline, WritingInline,
    ]

我发现在question package管理页面的内联表单中，Reading和Writing都显示为Question，我无法告诉彼此。他们没有编辑按钮。

在这种情况下，我该怎么办才能让admin显示子类模型？

Answer 1

然后在这种情况下，超类问题应该是一个抽象类：

class Question(models.Model):
    question_package = models.ManyToManyField(QuestionPackage, blank=True)
    name = models.CharField(max_length=128)
    answer = models.TextField()

    class Meta:
        abstract = True

https://docs.djangoproject.com/en/dev/topics/db/models/#abstract-base-classes

此处有更多信息Django Admin Interface Does Not Use Subclass's __unicode__()