Extending your Mongoose schema
Performing data manipulations is great, but to develop complex applications, you will need your ODM module to do more. Luckily, Mongoose supports various other features that help you safely model your documents and keep your data consistent.
Defining default values
Defining default field values is a common feature for data modeling frameworks. You can add this functionality directly in your application's logic layer, but that would be messy and is generally a bad practice. Mongoose offers to define default values at the schema level, helping you organize your code better and guarantee your documents' validity.
Let's say you want to add a created date field to your UserSchema. The created date field should be initialized at creation time and save the time the user document was initially created; a perfect example of when you can utilize a default value. To do so, you'll have to change your UserSchema, so go back to your app/models/user.server.model.js file and...
