How to update the _id of one MongoDB Document?
mongodb
Solution
You cannot update it. You'll have to save the document using a new `_id`, and then remove the old document.
// store the document in a variable
doc = db.clients.findOne({_id: ObjectId("4cc45467c55f4d2d2a000002")})
// set a new _id on the document
doc._id = ObjectId("4c8a331bda76c559ef000004")
// insert the document, using the new _id
db.clients.insert(doc)
// remove the document with the old _id
db.clients.remove({_id: ObjectId("4cc45467c55f4d2d2a000002")})
Problem
I want update an `_id` field of one document. I know it's not really good practice. But for some technical reason, I need to update it. If I try to update it I get: ``` db.clients.update({ _id: ObjectId("123")}, { $set: { _id: ObjectId("456")}}) Performing an update on the path '_id' would modify the immutable field '_id' ``` And the update is rejected. How I can update it?