tags.py

from tastypie import fields
from tastypie.resources import Resource

class TaggedResource(Resource):
    tags = fields.ListField() # no attribute declaration on purpose

            
    def dehydrate_tags(self, bundle):
        return map(str, bundle.obj.tags.all())


    def save_m2m(self, bundle):
        tags = bundle.data.get('tags', [])
        bundle.obj.tags.set(*tags)
        return super(TaggedResource, self).save_m2m(bundle)