如何为 Django 中的一对多关系的子类提供查询集字段？

Question

How can I provide a queryset field for a subclass of a one-to-many relation in Django?

Example:

class Concept(models.Model):
    ...


class StudyResource(models.Model):
    concept = models.ForeignKey(Concept, on_delete=models.CASCADE)
    ...


class VideoStudyResource(StudyResource):
    ...

Django provides:

concept.studyresource_set.all()

how can I also provide:

concept.videostudyresource_set.all()

Appreciate any suggestions.

Answer 1

• To handle One-To-Many relationships in Django you need to use ForeignKey .
• From this: You can't follow the ForeignKey backwards from Concept to VideoStudyResource .