Language Class about django-locallibrary-tutorial

[chrisdavidmills]

I think this is one of those instances that can be handled with a reverse lookup. This is explained in https://developer.mozilla.org/en-US/docs/Learn/Server-side/Django/Generic_views#Creating_the_Detail_View_template

[hamishwillee]

Yes, that's right. On that page the Chris references it is this bit:

This method is needed because you declare a ForeignKey (one-to many)
field in only the "one" side of the relationship. 
Since you don't do anything to declare the relationship in the other
 ("many") model, it doesn't have any field to get the set of associated 
records. To overcome this problem, Django constructs an appropriately named 
"reverse lookup" function that you can use. 
The name of the function is constructed by lower-casing the model name 
where the ForeignKey was declared, followed by _set (i.e. so the function created in Book is bookinstance_set()).