Appending item to a list nested within another list

Working with Data
,
3

Hi @Francesco_Garrisi, and welcome to the MongoDB forums.

** This solution won’t work as $[] updates all the array elements **

The following should let you update the last results array.

db.arrayPush.updateOne(
  {"_id": "670e362adbbe1ff03860a2e1"}, 
  {$push: {"testHistory.$[].results": 5}}
);

$[] indicates the last array element.