Update: You might also want to check out reset_column_information. So a few days ago we started seeing the following errors on our Jenkins builds (swapped with fictional model and attribute names): NoMethodError: undefined method `attack_power=' for #<Ironman:0x00000008525d20> attack_power is a new attribute we recently added to the Ironman ActiveRecord model. I was baffled, as the table column is clearly there but ActiveRecord couldn’t see it. This weird behaviour is confirmed by ...

[] Comic: Because ActiveRecord is Slow!