I'm a software developer living in Vancouver, BC. I use:

• Ruby on Rails
• MySql
• Javascript

Currently working at Noomii!

Recently I needed to update a counter cache to only count child elements meeting some criteria. In this case a User has many Reviews, but we only want to count the ‘approved’ reviews in our counter cache that we use for display. Rails comes with a nice counter cache implementation which is what we have been using thus far.

A little while ago our team was faced with an issue: certain DELETE requests were taking extremely long to process, to the tune of over 1 minute! This post explores what can happen when you have dependent: :destroy in a has_many relationship