Tag "chainable"

TaggedManager and TaggedQuerySet with chainable tagged() methods implemented with django-tagging

The popular [django-tagging](http://code.google.com/p/django-tagging/) app has, in its implementation and semantics, a highly usable and transparent elegance -- but then you have to call methods on a Tag instances' items collection. These classes let you inline the tag name in the chain of queryset filter methods instead. TO USE: ### models.py ... from tagging.fields import TagField from tagging.models import Tag as Tag class YourModel(models.Model): ... yourtags = TagField() objects = TaggedManager() ... ### and then elsewhere, something like-- ... ym = YourModel.objects.order_by("-modifydate")[0] anotherym = YourModel.objects.get(id=7) ## distinct from ym ym.yourtags = "tag1 tag2" anotherym.yourtags = "tag1 othertag" ym.save() anotherym.save() with_tag1 = YourModel.objects.tagged('tag1') with_tag2 = YourModel.objects.tagged('tag2').order_by('-modifydate') print ym in with_tag1 ## True print anotherym in with_tag1 ## True print ym in with_tag2 ## False ... since these are QuerySets, you can easily create unions (e.g. `with_tag1 | with_tag2` and othersuch) as you need and filter them to your hearts' content, without having to instantiate Tag all the time (which you can of course do as well).