update document via $set

[Rey8d01]

class QuerySet method update have next code

        update_arguments = dict(
            spec=update_filters,
            document={'$set': definition},
            multi=True,
            callback=self.handle_update_documents(callback)
        )

everything is ok, but it works only when I update collection (not document). if I update document execute method save and then _indexes_saved_beforesave - this code

self.coll(alias).update({'_id': document._id}, doc, callback=self.handle_update(document, callback))

may be better this code

self.coll(alias).update({'_id': document._id}, {"$set":doc}, callback=self.handle_update(document, callback))

like as update method.

[heynemann]

Can you submit a Pull Request with a test that shows it working?