undefined method `relation’ for nil:NilClass on Heroku
I host almost 100% of my open source projects on Heroku, it’s amazing how easy it is to setup and how “out-of-your-way” they are.
Today, while working on one of my open source project I encountered this error:
It was right after I deployed and migrated the database.
After about 5 minutes of head scratching I came across an answer on stackoverflow saying you have to restart your app after a migration for it to pick up on schema changes.
Had a DAH! moment thereSubmit to Hacker News
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[NOTE] updated May 9, 2012. It's 2455 days old . This article may have outdated content.