Tom Slabbaert questions

Tom Slabbaert answers

• MongoDB - group documents by field value
• Pymongo how to set read_preference
• MongoDB aggregation sum values and group by property
• Perfect match between users with mongoose
• Optional parameters in MongoDB
• How to use $$NOW in $match block of aggregation pipeline
• MongoDB: Ist there a possiblity to match a field containing a regular expression against a string in a $match stage in an aggregation pipeline?
• Why $nin is slower than $in, Mongodb
• Mongo updateMany statement with an inner array of objects to manipulate
• cursor pagination mongodb mongoose