In Mongo, how do I find all the documents, but display only their titles?

Question

There's a ['title'] attribute inside each document. How can I do a .find, but only display the title?

Answer 1

You can retrieve a subset of fields within the documents as follows:

eg looking retrieving only the title field for books with a given ISBN:

db.Books.find({ISBN : "1234567890" }, { title : 1 } );

You can also do field negation, ie return all fields EXCEPT the ones you specify. There's a good reference on this on MongoDB.org

Answer 2

您可以在http://www.mongodb.org/display/DOCS/Retrieving+a+Subset+of+Fields中找到该信息