Django get objects of objects

Question

I have 3 models:

class Project(models.Model):
   ...

class Group(models.Model):
    project = models.ForeignKey(Project, on_delete=models.CASCADE,
                                related_name="groups")

class Word(models.Model):  
    group = models.ForeignKey(Group, on_delete=models.CASCADE, null=True,
                              related_name="words")

I want to get all words that are in a project. How do I do this?

Maxim Kukhtenkov · Accepted Answer · 2018-05-15 17:48:26Z

5

You can use lookups that span multiple relationships:

project = Project.objects.get(...)

project_words = Word.objects.filter(group__project=project)

Django docs reference: https://docs.djangoproject.com/en/2.0/topics/db/queries/#lookups-that-span-relationships

edited May 15, 2018 at 17:48

answered May 15, 2018 at 16:06

Maxim Kukhtenkov

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