Use queryish library for results objects

[gasman]

queryish is a library I created for wrapping arbitrary datasources with an API that's consistent with Django's queryset - originally so that we could have choosers in Wagtail that pick objects from a REST API instead of the local database. This of course is a good fit for django-modelsearch's BaseSearchResults class.

Refactoring BaseSearchResults on top of Queryish allows us to eliminate a chunk of code, benefit from Queryish's wider unit testing for features like slicing and result caching, and potentially support a larger subset of the Queryset API (.first() is a quick win that works now; with more work it could be possible to support chaining things like .filter and .get after the search clause).

[kaedroho]

Hi @gasman, sorry I haven't had a chance to test this, are you happy for it to slide to 1.2?

[kaedroho]

Interesting, I didn't close this. It seemed to close by itself when I merged #39 and I can't reopen.

Please could you resubmit?

[gasman]

@kaedroho Sure - opened #63 now. I suspect Github might have some mixed-up references to my fork as a result of this repo temporarily existing on my account before being transferred to the wagtail org...