Great question — answering as the UphillTech team:
I’m not sure it’s structured in the best way. "best" is usually a pretty good indication that you are seeking an opinion. The following is my opinion. There are may ways this aggregation could be written, and which is best will depend on exactly how you define "best". Using $facet is an inefficient way to handle pagination. That pipeline starts with a couple of filters, which could possibly make use of an index. However, after modifying the documents with addBaseFields and populateRelations (I assume this uses $lookup?), no further matches or sorts will use an index, so buildDynamicFiltersMatch will never use an index, and buildSort, if it is included, will always be an in-memory sort....
Full answer by Joe: https://stackoverflow.stackexchange.com/a/79840766 (CC BY-SA 4.0).
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