Schema for User Ratings - Key/Value DB

Question

We\'re using MongoDB and I\'m figuring out a schema for storing Ratings.

• Ratings will have values of 1-5.
• I want to store other values such as from

Answer 1

The Below code can be used to get the average rating for each users.

db.ratings.aggregate([
 {
 $match:{ rated: '$user' },
 },
 {
 $order: {
  _id: "$rated",
  average: { $avg: "$rating" }
 }
 ])