Where Any? vs Exists? Discussion

I don't think this is true. any? does the same optimization by itself. The reason you got a full association loaded on the first command is because of the rails console trying to output something which triggers the query. In regular application code cluster.domains.where(name: 'foo.com') would not trigger a query yet and wait until something like each or any? is sent. You can try this by appending ;nil to console commands: cluster.domains.where(name: 'foo.com');nil

Yeah I should have mentioned that in the video so that was a detail oversight on my part. I was planning to update this video to mention it. Thank you for commenting about it though so others can be aware of it until I get an update out!