How can I use Factory Boy for advanced scenarios?

How can I use Factory Boy for advanced scenarios?

Factory Boy is a powerful tool for creating test data in Python. For advanced usage, you can define complex relationships between models, customize field values, and use sequences for unique data.

Can you give me an example of defining a factory with relationships?

Sure! You can define a factory for a Book model that has a foreign key relationship with an Author model like this:

class AuthorFactory(factory.Factory):
    class Meta:
        model = Author
    name = factory.Faker('name')

class BookFactory(factory.Factory):
    class Meta:
        model = Book
    title = factory.Faker('sentence')
    author = factory.SubFactory(AuthorFactory)

What if I want to create multiple instances at once?

You can use the create_batch method to create multiple instances. For example:

books = BookFactory.create_batch(10)
``` This will create 10 book instances with unique titles and authors.