Module: Mongoid::TaggableWithContext::AggregationStrategy::MapReduce::ClassMethods

Defined in:
lib/mongoid/taggable_with_context/aggregation_strategy/map_reduce.rb

Instance Method Summary collapse

Instance Method Details

#aggregation_collection_for(context) ⇒ Object 



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# File 'lib/mongoid/taggable_with_context/aggregation_strategy/map_reduce.rb', line 17

def aggregation_collection_for(context)
  "#{collection_name}_#{context}_aggregation"
end

#aggregation_database_collection_for(context) ⇒ Object

Collection name for storing results of tag count aggregation



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# File 'lib/mongoid/taggable_with_context/aggregation_strategy/map_reduce.rb', line 13

def aggregation_database_collection_for(context)
  (@aggregation_database_collection ||= {})[context] ||= Moped::Collection.new(self.collection.database, aggregation_collection_for(context))
end

#tags_for(context, conditions = {}) ⇒ Object 



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# File 'lib/mongoid/taggable_with_context/aggregation_strategy/map_reduce.rb', line 21

def tags_for(context, conditions={})
  aggregation_database_collection_for(context).find({:value => {"$gt" => 0 }}).sort(_id: 1).to_a.map{ |t| t["_id"] }
end

#tags_with_weight_for(context, conditions = {}) ⇒ Object

retrieve the list of tag with weight(count), this is useful for creating tag clouds



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# File 'lib/mongoid/taggable_with_context/aggregation_strategy/map_reduce.rb', line 27

def tags_with_weight_for(context, conditions={})
  aggregation_database_collection_for(context).find({:value => {"$gt" => 0 }}).sort(_id: 1).to_a.map{ |t| [t["_id"], t["value"].to_i] }
end