Question

For example given the BlogPost/Comments schema here:

http://mongoosejs.com/

How would I find all posts with more than five comments? I have tried something along the lines of

where('comments').size.gte(5)

But I’m getting tripped up with the syntax

Answer 1

MongoDb doesn’t support range queries with size operator (Link). They recommend you to create a separate field to contain the size of the list that you increment yourself.

You cannot use $size to find a range of sizes (for example: arrays with more than 1 element). If you need to query for a range, create an extra size field that you increment when you add elements.