Query MongoDB with a regex expression against an ObjectId

Question

Is it possible to do a query like:

db.artigo.find( { _id : ObjectId(\'520a504a3004bc615fcfcf16\') } )

but using a regex on ObjectId?

<

Answer 1

• ObjectId is not a string but a special type in MongoDB. You can not
  query with a regex expression operator against a field that contains ObjectId's.
• But... _id doesn't have to be an ObjectId, so what i would suggest is providing your own unique string as _id then you can use a regex
  expression for querying.