Learning is hard, but unlearning something is even harder. The main reason why learning something hard is not because it is hard in and of itself, but for the fact that most of the time, you have to unlearn a lot in order to learn a little. This is quite true for the datastore. Basically, it is built to scale to the so-called Google scale. That's why, in order to be proficient with it, you will have to unlearn some of the things that you know. Your learning as a computer science student or a programmer has been deeply enriched by the relational model so much that it is natural to you. Anything else may seem quite hard to grasp, and this is the reason why learning Google datastore is quite hard.

However, if this were the only glitch in all that, things would have been way simpler because you could ask yourself to forget the relational world and consider the new paradigm afresh. Things have been complicated due to Google's own official documentation where...