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[英]How to get all related objects in django model ForeignKey and OneToOneField
[英]How to get the foreignKey related primary key (pk) in the same model in django?
我需要獲取相關model.foreignKey對象的ID(pk),以便設置同一模型的model.FileField的“ upload_to”屬性。
像這樣:
class myClass(models.Model):
related_model = models.ForeignKey(RelatedModel,on_delete=models.CASCADE)
file = models.FileField(upload_to=str(related_model.id)+"/")
因此,例如,如果related_model具有primary_key 10,則upload_to attr必須為“ 10 /”
創建對象時是否可能需要在view.py文件中設置該值?
使用callable作為upload_to
參數。
def related_path(instance, filename):
return '{}/{}'.format(instance.related_model_id, filename)
class myClass(models.Model):
related_model = models.ForeignKey(RelatedModel,on_delete=models.CASCADE)
file = models.FileField(upload_to=related_path)
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