Achieve compatibility with RESTHeart

[AlekSi]

https://restheart.org

https://github.com/SoftInstigate/restheart#execute-the-integration-tests-suite

See also SoftInstigate/restheart#477.

Tasks

Beta Give feedback

1. Allow $ in the middle of field names #2088
   code/enhancement +1
   
2. Allow collection names to start with _ #2089
   code/enhancement +1
   
3. find command should support skip argument #1445
   code/enhancement +1
   
4. Create unique index for _id automatically #1384
   1 of 1
   code/feature +1
   
5. Implement the $sum aggregation operator #2013
   code/feature +1
   
6. $exists: false is not handled correctly by findAndReplace #2241
   code/bug +1
   
7. findAndModify should not allow upsert on existing _id #2461
   code/bug +1
   
8. Allow uppercase Latin letters in database names #2451
   code/enhancement good first issue +2
   
9. Error updating a document passing its same id with the $set operator #2803
   code/bug not ready +2
   
10. Implement $facet aggregation pipeline stage #1420
    area/aggregations code/feature +2
11. Support partial indexes (partialFilterExpression, sparse) #2448
    area/indexes code/feature not ready +3