Question

我有3个型号：

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")

我想获得项目中的所有单词。我该怎么做？

Answer 1

您可以使用跨多个关系的查找：

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

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

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

Django获取对象的对象

1 个答案: