Dataset quads and objects don't find the same data

[drewp]

    g = Dataset()
    g.parse(file=Path('fixed_config.n3').open('rt'), format='n3')
    g.parse(file=Path('ui_selections.n3').open('rt'), format='n3')
    g.parse(source='http://10.43.160.4/graph/currentEvents', format='trig')

            for ev in g.quads((cal, EV['event'], None, None)):
                log.info(f'    found an event1 {ev}')
            for ev in g.objects((cal, EV['event'], None, None)):
                log.info(f'    found an event2 {ev}')

The first log prints once but the second does not. I expected the queries to match the same statements (returning a quad in log1 or a the quad's object node in log2).

[edmondchuc]

What result do you get if you enable default union on the Dataset object?

g = Dataset(default_union=True)

[mbrock]

I just spent some hours being confused by this. Indeed, enabling default_union fixes the problem.

Without that setting, dataset.triples((s, p, o)) only iterates over the default graph, unlike .quads((s, p, o, None)).

That may be intentional, but the documentation for Dataset explicitly says that "querying triples return them all regardless of the graph" which as far as I can tell is not true.