Remove old records in mongodb based on Month

Question

I am trying to delete Older records present in my collection .

I have a collection named \"user_track\" , which consists of data in this format shown below

Answer 1

Probably there is a cleaner solution but this should work:

1. Create new Data field from date strings:

   var cursor = db.user_track.find()
   while (cursor.hasNext()) {
       var doc = cursor.next();
       db.user_track.update(
           {_id : doc._id},
           {$set : {access_time_ : new    Date(doc.access_time)}})
   }
   

2. Now you can retrieve some records by comparing dates:

   db.user_track.find({access_time_: {$lt: new Date("Sep 01 2013 00:00:00 GMT+00:00")}})
   

3. If everything works as expected remove obsolete records:

   db.user_track.remove({access_time_: {$lt: new Date("Sep 01 2013 00:00:00 GMT+00:00")}})
   

4. In the future use date objects not strings