Missing insert value on not null without default should fail

I searched the issues and checked the README and have not yet found any mention of this.

Is it expected to be the case that columns with a NOT NULL definition and no default value should be allowed/inserted with an empty string when none was provided? My hope/expectation would be that it would return the error from the DB when it attempts this (rather than just inserting a blank string). I did see that for most create/update actions, null is returned when the call fails (which can be a handy indicator of some error condition, but only when it is null and values aren't just remapped to blank strings and inserted silently.)

Thoughts?