Slick 3.1 - Printing SQL from DBIOAction (insert statements)
This is not handle by Slick 3.1 you can see the source code, but you can get this feature available into Slick 3.2 version.
If you a have a larger code base & can't upgrade to 3.2 in that case you can just add this commit to 3.1 source code, build & use it. Make sure you import the necessary things required for the commit.