Created
July 26, 2010 18:05
-
-
Save zargony/490948 to your computer and use it in GitHub Desktop.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| module MongoidUtils | |
| # Utility module to include in Mogoid documents | |
| module Document | |
| extend ActiveSupport::Concern | |
| module ClassMethods | |
| # Do a map/reduce operation on the document's collection and return the results as one big | |
| # hash. If a block is given, it is yielded with key and value for every result instead | |
| # (this comes in handy if you expect large results) | |
| def map_reduce (map_function, reduce_function, options = {}) | |
| options[:query] = criteria.selector | |
| tmp_collection = criteria.klass.collection.map_reduce(map_function, reduce_function, options) | |
| if block_given? | |
| tmp_collection.find.each { |doc| yield doc['_id'], doc['value'] } | |
| nil | |
| else | |
| tmp_collection.find.to_a.inject({}) { |results, doc| results[doc['_id']] = doc['value']; results } | |
| end | |
| ensure | |
| tmp_collection.drop if tmp_collection | |
| end | |
| alias :mapreduce :map_reduce | |
| end | |
| end | |
| end |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment