MongoDB : update entire document except _id using C# driver

问题

I have to update all the fields except _id. I want to avoid to manually update the 16 fields... All the new fields are stored inside a BsonDocument

Thanks for ideas

回答1:

As @Philipp hinted there is a way way to do this. You can actually use the save function ( http://www.mongodb.org/display/DOCS/CSharp+Driver+Tutorial#CSharpDriverTutorial-Save%3CTDocument%3Emethod ) which will do what he says for you in the database end.

So imagine you have a document of:

{
    _id: {},
    d: 1
}

And that _id already exists, it will replace the previous document with this one.

Neat huh?

回答2:

When I understood you correctly, you have a document B with new data and you want it to completely replace document A.

In that case you can just set the _id field of document B explicitely to the value of the _id field of document A. When you then save document B, it will replace document A in the database.

When a saved document has the id of an existing document, the database will treat it like a new version of that document, not as a new document.

来源：https://stackoverflow.com/questions/14336116/mongodb-update-entire-document-except-id-using-c-sharp-driver