Cannot display pouchDB collection

I am coding a colaborative app.
I use pouchDB to synchronize data between all devices. I never used Ionic neither angular, so sorry if I don't explain clearly the things.

This is my controller : https://gist.github.com/kranack/3e3b4bf61e21e1c9b3c9

And this is my template : https://gist.github.com/kranack/acead43d18115236bfa6

And the problem is : angular can't repeat on the books collection.

So, I don't know if that's because I have to load my database connection in my app.js or if I did a mistake in code.