Geographic database containing the main countries of the world and managing the visits of travelers.It shows you the use of N:m relations, and furnishes you some forks to explain how to edit your component.It instances Google Maps and teaches you how to instance any kind of map.
I have to say your builder is great! We use for another project in a week we have the system built. For the J!Boleto I convert to j3 in 2 weeks :) Luiz Felipe Weber