Ah ha!
I figured this out. It was a mix of a lazy eye and some peculiarities
between Postgres(live) and sqlite(test-case).
Given the query:
session.query(Foo).options(contains_eager('bar')).order_by(Foo.id.desc()).offset(0).limit(100).all()]
The SQL is (approx)
select foo.*, bar.* from foo, bar order by foo.id desc limit 100;
I didn't notice that there wasn't a `join` from foo to bar until I
reformatted the SQL.
SqlAlchemy just drops in the 'bar' on the query.
In such a case, shouldn't the library ideally:
• raise some error
or
• not add in the "join"
?
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