MongoDB tips

import-export

# Load a MongoDB collection with test data

## Let's load some sample data in mongo

    curl -s 'http://www.json-generator.com/j/cdQGOkHUoi?indent=4' | mongoimport --db playpen --collection people --jsonArray
    mongo playpen

## Create facets based on this [walkthru](http://blog.mongodb.org/post/59757486344/faceted-search-with-mongodb)

    db.people.ensureIndex({"facets3.age" : 1})
    db.people.ensureIndex({"facets3.gender" : 1})
    db.people.find().forEach( function(doc) {
      db.people.update({_id:doc._id}, {$set:{"facets3": { age : [ doc.age ], gender : [ doc.gender ] } }});
	  });

    db.people.find({ 'facets3.age' : 39 }).explain()