Problems with updating listed DB items.

Ok, so on click I want to update all the items from the DB that are populated from the query service in a list to change one field of all the items. What I'm trying to do is update the field "draft" to the value of "false" for all the listed items prompted by clicking a button.
So what I did for this was created an update service and set the value of "draft to "false":

And mapped it like so:

I then invoke the service on click of "send".
Here's the process from the user perspective:

Here's a link to test the app:

Can anyone explain why it is I can't update the listed items?
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