In my mongoDB database, the documents have the following structure:
{username:String, paymentYear:Int, paymentMonth:Int}
I am trying to retrieve the latest document for a specific username, which would be the one with the date closest to the current Date.now() value. What would be the most effective approach for achieving this? Is there a specific mongoDB query I can utilize, or should I develop custom code for this task?
Appreciate any assistance. Thank you.
You can achieve this functionality by utilizing MongoDB's $dateFromParts stage within the Aggregation pipeline.
db.test.aggregate([
{
"$addFields": {
"tempDate": {
"$dateFromParts": {
year : '$paymentYear',
month : '$paymentMonth',
}
}
}
},
{
"$sort": {"tempDate": -1} // Update from `-1` to `1` for Ascending Order
},
{
"$limit": 1 // Specify the number of documents to return based on the sort order
},
])
Alternatively, you can incorporate this logic in the $project stage instead of using $addFields depending on your specific requirements for optimized performance.
Keep in mind that this functionality is compatible only with MongoDB version 3.6 and later.
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