Entities and data access

To persist data in Google Cloud Datastore, we need a struct to represent each entity. These entity structures will be serialized and deserialized when we save and load data through the datastore API. We can add helper methods to perform the interactions with the data store, which is a nice way to keep such functionality physically close to the entities themselves. For example, we will model an answer with a struct called Answer and add a Create method that in turn calls the appropriate function from the datastore package. This prevents us from bloating our HTTP handlers with lots of data access code and allows us to keep them clean and simple instead.

One of the foundation blocks of our application is the concept of a question. A question can be asked by a user and answered by many. It will have a unique ID so that it is addressable (referable in a URL), and we'll store a timestamp of when it was created.

Create a new file inside answersapp called questions.go and...