django报错TypeError: __init__() missing 1 required positional argument: 'on_delete'
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In learning Django, performs error TypeError python manage.py makemigrations learning_logs Times: __init __ () missing 1 required positional argument: 'on_delete' resolve property on_delete added in brackets = models.CASCADE to
topic = models.ForeignKey(Topic, on_delete=models.CASCADE)
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