Update the Key in the nested array

[steevej (Steeve Juneau)]

That would be the same way as it was answered to you in

Update the DataType for a field inside the nested array embedded document

Hi there, It’s possible to do this using pipeline updates, I’ll show what it looks like in JS/mongo shell and you can translate it to C# then: db.uptype.update( {"tag.tagExceptions.exceptionDate":{$type:"string"}}, [{$set:{"tag.tagExceptions":{$map:{ input:"$tag.tagExceptions", in:{$cond:{ if:{$eq:["string",{$type:"$$this.exceptionDate"}]}, then:{$mergeObjects:["$$this", {exceptionDate:{$toDate:"$$this.exceptionDate"}}]}, e…