mismatch of UML design and actual code

[lokesh1729]

Hey,

I see in UML that relationship between Book and Author is ManyToMany but whereas in code catalog/models.py (quoting the code below) it was mentioned that "book can only have one author"

author = models.ForeignKey('Author', on_delete=models.SET_NULL, null=True)
# Foreign Key used because book can only have one author, but authors can have multiple books
# Author as a string rather than object because it hasn't been declared yet in file.

Why there is discrepancy ???

[hamishwillee]

Because the design changed during implementation without corresponding update to the docs. Fix on mdn and in example now. Thanks for spotting this.