I'm reasonably fluent in SQL, and while I've found Django's ORM is
great for basic CRUD operations, I'm having trouble creating joins.

For example, I have a three tables, Article, Rating, and User. Rating
stores a user's rating of a particular article. I'm trying to create a
view that lists articles, and optionally shows the current user's
rating of each article, if they've made one. To query the rating
record along with the article in SQL, this would just be a simple left
outer join. How would this be done with Django's ORM? I've reviewed
http://www.djangoproject.com/documentation/model-api/#relationships
but I don't think it covers this case.

Regards,
Chris
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