First of all, congrats for this great piece of software.
I want to use something like this in a more complex expression to rename movies: {imdbid ? imdbid : y}
What I finally want to achieve is:
if (imdbdid exists) {imdbid} else {y}
or better
if (imdbdid exists) {imdbid} else if (y exists) {y} else {'unknown'}
The problem is I get a binding exception when no imdbid exists and the whole expression is bypassed.
That's not really a problem for movies as 99.99% are in IMDB but it is for concerts

Thanks in advance for pointing me in the right direction.