Module: MongoidExt::Tags::ClassMethods

Defined in:
lib/mongoid_ext/tags.rb

Instance Method Summary collapse

Instance Method Details

#find_tags(regex, conditions = {}, limit = 30) ⇒ Object 



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# File 'lib/mongoid_ext/tags.rb', line 34

def find_tags(regex, conditions = {}, limit = 30)
  pipeline = []
  if regex.is_a? String
    regex = /#{Regexp.escape(regex)}/
  end
  match = {:$match => {:tags => {:$in => [regex]}}}

  if !conditions.blank?
    match[:$match].merge! conditions
  end
  pipeline << match

  pipeline <<  {:$project => {:tags => 1}}
  pipeline <<  {:$unwind => "$tags"}
  pipeline <<  {:$match => {:tags => regex}}
  pipeline <<  {:$group => {:_id => "$tags", :count => { :$sum => 1}}}
  pipeline <<  {:$project => {:_id => 0, :name => '$_id', :count => 1}}
  pipeline <<  {:$sort => {:count => -1}}
  pipeline <<  {:$limit => limit}
  self.collection.aggregate(pipeline)
end

#find_with_tags(*tags) ⇒ Object

Model.find_with_tags(“budget”, “big”).limit(4)



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# File 'lib/mongoid_ext/tags.rb', line 30

def find_with_tags(*tags)
  self.where({:tags.in => tags})
end

#tag_cloud(conditions = {}, limit = 30) ⇒ Object 



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# File 'lib/mongoid_ext/tags.rb', line 13

def tag_cloud(conditions = {}, limit = 30)
  pipeline = []
  if !conditions.blank?
    match = {:$match => conditions }
    pipeline << match
  end

  pipeline <<  {:$project => {:tags => 1}}
  pipeline <<  {:$unwind => "$tags"}
  pipeline <<  {:$group => {:_id => "$tags", :count => { :$sum => 1}}}
  pipeline <<  {:$project => {:_id => 0, :name => '$_id', :count => 1}}
  pipeline <<  {:$sort => {:count => -1}}
  pipeline <<  {:$limit => limit}
  self.collection.aggregate(pipeline)
end