How to use MongoDB date aggregation operators in Node.js with Mongoose ($dayOfMonth, $dayOfYear, $dayOfWeek, etc)
While I was working on creating a tutorial for MongoDB aggregation I came across a few issues while trying to use the built in date aggregation operators. I was storing the date in the db as the unix epoch timestamp. I tried multiple variations such as “new Date()”, “new Date().getTime()”, “Date.now()”, etc, but none of those would work. I kept getting this error “can’t convert from BSON type NumberDouble to Date”. Turns out, the solution was very simple, and something I completely overlooked (more…)