Question

我有两个相互关联的模型。我需要创建一个子文件夹，以通过qa id保留附件。但我正在努力获取相关对象ID的ID。有人可以帮忙吗？

class Qa(models.Model):

    question_text = models.CharField(max_length=1000, verbose_name='Q')
    answer_text = models.TextField(blank=True, verbose_name='A')



class Attachment(models.Model):
    qa = models.ForeignKey('Qa', blank=True, null=True, on_delete=models.CASCADE, related_name='files' )
    attach_file = models.FileField(upload_to=f'qa_data/{qa_id}/', null=True, verbose_name='Attachment')

Answer 1

def directory_path(instance, filename):
    return 'qa_data_{0}/{1}'.format(instance.qa.id, filename)

class Attachment(models.Model):
    attach_file = models.FileField(upload_to=directory_path)

使用自定义函数获取qa_id，然后保存

如何获取相关对象的id属性

1 个答案: