pk=[] returns all articles

[martijnbastiaan]

When using list_articles() one would expect the following code to run without any errors:

api = AmcatAPI(**auth)
articles = api.list_articles(project=pn, articleset=an, pk=[])
self.assertEqual(0, len(list(articles)))

However, leaving pk 'empty' results in filtering on no pk at all. This is unexpected behaviour.

@vanatteveldt How should we fix this, if at all?

[vanatteveldt]

Easy fix is in amcatclient to remove non-True filters. If the behaviour is caused by rest_framework I don't think we need to fix it.