How to declare collection name and model name in mongoose

Question

I have 3 kind of records,

1)Categories,
2)Topics  and
3)Articles 

In my mongodb, i have only 1 colection named \'categories\' in which i stroe

Answer 1

You can use Mongoose Discriminators (http://mongoosejs.com/docs/discriminators.html) for that.

This article has a good and easy example of how to do that: https://docs.microsoft.com/en-us/azure/cosmos-db/mongodb-mongoose#using-mongoose-discriminators-to-store-data-in-a-single-collection.