Pepe, i know what you're saying - ultimately this is my fault for not 
reading the documentation.  But, it seems like a lot of people have 
missed this too.  It's a very important aspect of callbacks, and i think 
it should be made more obvious in the documentation, especially since 
one is given no feedback whatsoever as to why the process failed.

In this case i noticed it because a record wasn't saved, but if it 
wasn't a before_create callback that went wrong, and was instead an 
after_destroy for example, i wouldn't have noticed.  Maybe the 
documentation could be changed so that this is immediately drawn to the 
attention of someone reading the section on callbacks, rather than being 
two pages down.

Anyway, i'd be interested to know how many other people didn't know 
about this.  I think i'll do a couple of polls :)

thanks!
max
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