RubyFlow The Ruby and Rails community linklog


The Ruby and Rails community linklog

Made a library? Written a blog post? Found a useful tutorial? Share it with the Ruby community here or just enjoy what everyone else has found!

Optimizing Active Record Associated Record Count Queries With the belongs_to counter_cache Option

It is often useful to know how many records are associated with a model identified as being the parent in a belongs_to relationship. Active Record’s default behavior is to determine this number using a COUNT(*) query. Fortunately, you can avoid this additional costly query by caching the associated record account with a few simple modifications to your Rails application. Read the tutorial.

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