I'm working on a script that is moving some documents from one collection to another, so if a document met the needed criteria I'm inserting it into another collection and removing it from the original collection. And one document failed with the error invalid document for insert: keys cannot begin with "$": "$date" because it has an field like:
"rerender_at" : {
"$date" : {
"$numberLong" : "1485872000000"
}
},
But if mongo does not allow to insert of fields with $ how it's possible that the document has that data already??? Or if it's possible to insert, how can I do it???
Referring to this topic it's not allowed to insert