MongoMapper and bson_ext problem

Question

I can\'t get MongoMapper to work with my Rails app. I get this error message:

**Notice: C extension not loaded. This is required for optimum MongoDB Ruby driver performa

Answer 1

This is generally caused by installing a version of bson_ext not equal to the version number required by MongoMapper. Check which version of bson MongoMapper is requiring, and then make sure that you have that version and no other installed.