oggie rob wrote: > Right, but what good is overriding len(..) if you have the list > already? You've already fetched the records, right? > As Jacob said before, when you say "get_article_count", you know that > you are actually executing an SQL query. What is the case when you say > reporter.articles? Is this a list already (from cache or from an SQL > execution)? > > -rob > > No no no. When you get access reporter.article_set , you get an object that will allow you to :
* add new query parameters with .filter etc, returning itself * do orthogonal methods like add * call __iter__ and other collection methods, which will *then* trigger the fetch from the database if it hasn't already happened. Understand now?
