Case-insensitive find_or_create_by_whatever

Question

I want to be able to do Artist.case_insensitive_find_or_create_by_name(artist_name)[1] (and have it work on both sqlite and postgreSQL)

What\'s the best

Answer 1

You have to create an index based on the database.

postgreSQL

Create a lower case index on artist_name column.

CREATE INDEX lower_artists_name ON artists(lower(artist_name))

mySQL

Searches are case insensitive

sqlLite

Create a index on artist_name column with collate parameter

CREATE INDEX lower_artists_name ON artists( artist_name collate nocase)

Now you can use find_or_create in a DB independent manner:

find_or_create_by_artist_name(lower(artist_name))

Reference

PostgreSQL: Case insensitive search

sqlLite: Case insensitive search