> > For the Wiki Tutorial, In the show(): controller in default.py there > is the following statement: > > db.comment.page_id.default = this_page.id > > I can't quite figure out what it means. Are we setting the default > value of the page_id field for the comment table to be 'this_page.id"? > However, in this case, this_page is being fetched from the database, > so potentially this default value could change everytime the show() > controller is called. This defeats the point of defining a default > value. > Actually, that's exactly the idea. The default will be different for each unique page. That way, when someone submits a comment on a given page, the page_id will automatically be the id of the page being viewed. There's no reason the default value specified for a field has to be universally constant across all requests. The default value can be changed programmatically at any time. In fact, it can even be a lambda function that calculates a new value for each insert.
Anthony
