Comments come with two status flags:
The relation name to use when looking up the parent object of this Comment. This is the name of the backref property which can be used to find the object that this Comment belongs to. Our convention is to have a controller by this name, with a ‘view’ action which accepts a slug, so we can auto-generate links to any comment’s parent.
An instance of mediadrop.model.author.AuthorWithIP.
The object this Comment belongs to, provided for convenience mostly. If the parent has not been eagerloaded, a query is executed automatically.