esarkissian-rythmos commented on issue #3471: NIFI-6293 Fix for MongoDB 
Aggregation does not parse dates
URL: https://github.com/apache/nifi/pull/3471#issuecomment-492016221
 
 
   Any "$match" statement that requires date checking, for example:
   
   ```json
   [ { "$match": { "someDateField": { "$gt": "2019-01-01T00:00:00.000Z" } } } ]
   ```
   
   The problem is that internally this is sent as a string to Mongo, instead of 
a date object. So the comparison does not work.
   
   I am later finding out that this PR may not be the most straightforward way 
to do this. I think the other MongoDB processors allow the use of Extended JSON 
to do this, e.g. GetMongo:
   
   ```
   { "someDateField": { "$gt": { "$date": "2019-01-01T00:00:00.000Z" } } }
   ```
   
   I think if we use the BasicDBObject.parse() static method we can achieve the 
same functionality. This is much better than what I have done in this PR. In 
fact we should probably kill this PR.

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