Phoenix models automatically adding tracking fields.

I started building a new API for a side project of mine. I created my first resource using the mix phoenix.gen.json task. I started to play around with it directly on Postman just to make sure I have everything setup properly and when I looked at the console I got a nice surprise.

Notice that is creating both a inserted_at and updated_at fields into the db. Those fields are not exposed in the model since I didn't declare them when running my generator, but they are already there ready for me to consume.

Very nice!