Mongodb c++ driver: string encoding

Question

During working on one c++ project we decided to use MongoDB database for storing some data of our application. I have spent a week linking and compiling c++ driver, and its works now. But it is one trouble: strings like

bob.append("name", "some text with cyrilic symbols абвгд");

are added incorrectly and after extracting from database look like 4-5 chinese symbols.

I have found no documentation about unicode using in mongodb, so I can not understand how to write unicode to database.

Adam Monsen · Accepted Answer · 2011-12-09 23:14:35Z

1

Your example, and the example code in the C++ tutorial on mongodb.org work fine for me on Ubuntu 11.10. My locale is en_US.UTF-8, and I the source files I create are UTF-8.

MongoDB stores data in BSON, and BSON strings are UTF-8, and UTF-8 can handle any Unicode character (including Cyrillic). I think the C++ API assumes strings are UTF-8 encoded, but I'm not sure.

Here are some ideas:

If your code above (bob.append("name"... etc) is in a C++ source code file, try encoding that file as UTF-8.
Try inserting Unicode characters via the mongodb shell.

edited Dec 9, 2011 at 23:14

answered Dec 9, 2011 at 23:00

Adam Monsen

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