Effectively Using Materialized Views in Ruby on Rails

17/12/2020
2.915

It's every developer's nightmare: SQL queries that get large and unwieldy. This can happen fairly quickly with the addition of multiple joins, a subquery and some complicated filtering logic. I have personally seen queries grow to nearly one hundred lines long in both the financial services and health industries.Luckily Postgres provides two ways to encapsulate large queries: Views and Materialized Views. In this article, we will cover in detail how to utilize both views and materialized views within Ruby on Rails, and we can even take a look at creating and modifying them with database migrations.Our example will be a real-world sized dataset of hockey teams and their top scorers. If you'd like to follow along, the source code covered in this article can be found here.
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