How to debug silent database errors (such as "save") in Rails?

Question

How can I get further information on errors that occur silently in Rails, such as @object.save?

Answer 1

Add bang so that an error is raised when validation fails.

@article.save!
# ActiveRecord::RecordInvalid: Validation failed: Title can't be blank...

Always use this method in preference to save if you don't expect validation to fail.

Answer 2

As per this post, something like the following works:

logger.debug @item.errors.full_messages