Gary Murakami questions

Gary Murakami answers

• Mongoid upsert with a different key
• Mongoid attr_accessible not working
• Updating embedded document with Mongoid updates the parent document instead
• how mongoid create index for test and production environment
• Best way to group by date with Mongoid
• Mongoid Batch Update/Upsert Alternative?
• "Not equal" named scope in rails with Mongoid
• How to union two different Mongoid Criteria
• Remove embedded document in a nested array of documents