oh damn ive learned so much from doing this, thx y all

You could do ".digits.reverse" instead of ".to_s.chars" too! :D
You wouldn't need to convert them back to integers later on if you do that.

or .split('')

ah i cant believe i forgot chars! love that one

I re-did the Kata and wrote a solution that has to look at each item in list exactly once.

Yes, actually. I think that'd be great. You can check for exists as a start. :)

Also, I think some test cases in the kata would help make it easier to understand the spec. "Implement a sqlite database with this in it" without test cases I think confuses some. :)

What I wrote works locally, but errors on CW. Can someone give me a hint?

/tmp/haskell114830-10-1iku8z7/Main.hs:21:18:
Ambiguous occurrence Movie' It could refer to either Main.Movie',
defined at /tmp/haskell114830-10-1iku8z7/Main.hs:19:6
or Movies.Movie', imported from Movies' at /tmp/haskell114830-10-1iku8z7/Main.hs:17:1-13
(and originally defined
at /tmp/haskell114830-10-1iku8z7/Movies.hs:(18,1)-(24,2))

hmm, i think "get_value" is a bad name for the primary function, as you are asking to have a person both get AND set.