Django數據庫ForeignKey問題
pickupStore=models.ForeignKey('Branch', on_delete=models.CASCADE)
returnDate=models.DateField()
returnStore=models.ForeignKey('Branch', related_name='branchID')
rentedVehicle=models.ForeignKey('Vehicle', on_delete=models.CASCADE)
我開了好幾個table, 但是在設置ForeignKey之後就出現了error:
TypeError: __init__() missing 1 required positional argument: 'on_delete'
是哪裡出錯了?
on_delete=models.CASCADE不對嗎?
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当前有3条评论
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虛老爺 :2018九月03号 00:27:04returnStore用related_name是因為ForeignKey跟住pickupStore一樣
Django會出error:
app.Order.pickupStore: (fields.E304) Reverse accessor for 'Order.pickupStore' clashes with reverse accessor for 'Order.returnStore'.
HINT: Add or change a related_name argument to the definition for 'Order.pickupStore' or 'Order.returnStore'.
app.Order.returnStore: (fields.E304) Reverse accessor for 'Order.returnStore' clashes with reverse accessor for 'Order.pickupStore'.
HINT: Add or change a related_name argument to the definition for 'Order.returnStore' or 'Order.pickupStore'.0 0 回复 举报-
繁花社长 :2018九月03号 01:00:19好像django2的所有ForeignKey必须加上on_delete属性。所以只要是ForeignKey，你在后面就要加上这个，否则会报错0 0 回复 举报
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