Sampling data from MongoDB by date and its absence?

Question

MongoDB

Hi all!
From the view table

{ 
         "start" : ISODate(), 
         "end" : ISODate() 
}

It is required to find an array of data in a given interval, this is easily solved using $lt, $gt.
How to include in this array when fetching data where end == null or undefined?

Answer 1

You can optimize, store end=start, take this into account on the client.

Answer 2

$or: [
{end: null},
{end: {$gt: ISODate()}}
]
So far I've decided this way, is there a more elegant method?