I think there's a misunderstanding - I don't want to manually populate the
relationship, I want to avoid spamming queries if I get e.g. 10 categories
and need the parent chains for all of them.
Here's a pseudo-ish example of what I'd like to do (without queries in the
loop):
categories = Category.query.filter(Category.id.in_([1, 2, 3, 4, 5,
6])).options(...)
for category in categories:
print category, category.parent_list
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