Django的外鍵

Question

的獨特組合，我有4個Django模型：

class KeyOne(models.Model): 
    name = models.CharField(unique=True) 

class KeyTwo(models.Model): 
    name = models.CharField(unique=True) 

class KeyThree(models.Model): 
    name = models.CharField(unique=True) 

class KeyList(models.Model): 
    key_one = models.ForeignKey(KeyOne) 
    key_two = models.ForeignKey(KeyTwo) 
    key_three = models.ForeignKey(KeyThree) 
    list = models.CharField() 

基本上，KeyList是的KeyOne，KeyTwo和KeyThree不同組合相關的關鍵字的列表。我如何確保在Django Admin中只能輸入獨特的組合？

Answer 1

你必須在密鑰列表的元類設置：

class KeyList(models.Model): 
    key_one = models.ForeignKey(KeyOne) 
    key_two = models.ForeignKey(KeyTwo) 
    key_three = models.ForeignKey(KeyThree) 
    list = models.CharField() 
    class Meta: 
     unique_together = (("key_one", "key_two", "key_three"),)