rkv | Rkv - embeddable KV database in Go | Database library

As said in the comments, the problem is that the date is stored as a string and not a proper datetime datatype. On string fields, when you use the $lte and $gte operators, MongoDB will compare the values as strings (lexicographic order), not as dates.

Aside from converting the stored dates to datetime, there are a couple more options:

1. Store the dates in a lexicographically orderable string format, such as ISO 8601. If the date is represented as yyyy-mm-ddThh:mm:ss, it can be compared as a string as well.
2. Create an aggregation that converts the strings to a date object before comparing them. This is not efficient for queries because it will need to convert all dates in all documents before applying the filter and therefore does not use any indexes, however you can do:

i think the best way you send JSON format, not in array

Sadly, in my case it is impossible to borrow the value into the closure, because abort consumes the transaction. (Thanks to @vkurchatkin for explaining that)

In case anyone is interested, I've worked out a solution that satisfies me regardless of the issue. It was possible for me to avoid nesting a bunch of matches.

I moved all of the logic that works on the transaction into a separate function and then delayed the evaluation of the function Result until after running txn.abort() (see comments):

You'd need to add a bridging header file to your project and import the notif_keys.h file in the bridging header file. If you need additional information on how to do this, please ask and I'll expand upon the answer.