I’ve recently had to do a custom sort for a work project that has required a sort on something that is not naturally sortable correctly (For example, alphabetical or numerical sorting). While searching for a completely different solution, I came across this post that outlined a nice technique. Basically, when you have a field in your Rails model with a predefined set of possible values, you can use a CASE statement in PostgreSQL to perform the sort in whichever order these values should appear. Here’s a sample of how this could be achieved using Rails:
It’s messy of course - how you want to format the SQL string is up to you, but it’s a great solution when you don’t have the normal sorting capabilities of a ENUM datatype available to you.