You do need to run this initialization code every time you run your app to register your app's Schemas with mongoose.
When your app ends, mongoose does not store your Schema(s). So, the next time you run an app that uses a Schema, you need to register your Schema(s) again.
However, it's fairly easy to set up your app to do so.
Here are two links to code that demonstrates how one can initialize schemas in mongoose. The first is in JavaScript, the second is in CoffeeScript.
https://github.com/fbeshears/register_models
https://github.com/fbeshears/register_coffee_models
The JavaScript demos is just one app.
The CoffeeScript code has two separate apps. The first stores documents with MongoDB, the second finds and displays the documents stored by the first app.
