I had some errors occurring in my controller, but it wasn’t displaying in my views. So I had to figure out how to see what was happening since I didn’t see any messages in the logs that were helpful either.
I found the solution in one of the answers here on Stack Overflow.
By adding this to my controller (it was the creation of a model – @user):
logger.warn("====error==========#{@user.error.full_messages.inspect}============")
This recorded the error in my logs (one of my model validations needed to be changed).