How do foreign keys work in Django ORM?
An example of an AI chatbot conversation about Django ORM foreign keys.
How do foreign keys work in Django ORM?
In Django ORM, a foreign key is a field that creates a relationship between two models. It allows you to link one model to another.
Can you give me an example of how to define a foreign key in a model?
Sure! You can define a foreign key in a model like this: author = models.ForeignKey(Author, on_delete=models.CASCADE).
What does the on_delete parameter do?
The on_delete parameter specifies what should happen when the referenced object is deleted. For example, models.CASCADE will delete all related objects.
Are there any other options for the on_delete parameter?
Yes, other options include SET_NULL, PROTECT, and SET_DEFAULT, each with different behaviors when the referenced object is deleted.
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