Module: ActsAsTaggableOnPadrino::Taggable::Collection::ClassMethods

Defined in:
lib/acts_as_taggable_on_padrino/taggable/collection.rb

Instance Method Summary collapse

Instance Method Details

#acts_as_taggable_on(*args) ⇒ Object 



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# File 'lib/acts_as_taggable_on_padrino/taggable/collection.rb', line 33

def acts_as_taggable_on(*args)
  super
  initialize_acts_as_taggable_on_collection
end

#all_tag_counts(options = {}) ⇒ Object

Calculate the tag counts for all tags.

Parameters:

  • options (Hash) (defaults to: {}) —

    Options:

    • :start_at - Restrict the tags to those created after a certain time

    • :end_at - Restrict the tags to those created before a certain time

    • :conditions - A piece of SQL conditions to add to the query

    • :limit - The maximum number of tags to return

    • :order - A piece of SQL to order by. Eg ‘tags.count desc’ or ‘taggings.created_at desc’

    • :at_least - Exclude tags with a frequency less than the given value

    • :at_most - Exclude tags with a frequency greater than the given value

    • :on - Scope the find to only include a certain context



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# File 'lib/acts_as_taggable_on_padrino/taggable/collection.rb', line 54

def all_tag_counts(options = {})
  options.assert_valid_keys :start_at, :end_at, :conditions, :at_least, :at_most, :order, :limit, :on, :id

  ## Generate scope:
  tagging_scope = ActsAsTaggableOnPadrino::Tagging.select("#{tagging_table_name}.tag_id, COUNT(#{tagging_table_name}.tag_id) AS tags_count").
      joins("INNER JOIN #{table_name} ON #{table_name}.#{primary_key} = #{tagging_table_name}.taggable_id").
      where(:taggable_type => base_class.name)
  tagging_scope = tagging_scope.where(table_name => {inheritance_column => name}) unless descends_from_active_record? # Current model is STI descendant, so add type checking to the join condition
  tagging_scope = tagging_scope.where(:taggable_id => options.delete(:id)) if options[:id]
  tagging_scope = tagging_scope.where(:context => options.delete(:on).to_s) if options[:on]
  tagging_scope = tagging_scope.where(["#{tagging_table_name}.created_at >= ?", options.delete(:start_at)]) if options[:start_at]
  tagging_scope = tagging_scope.where(["#{tagging_table_name}.created_at <= ?", options.delete(:end_at)]) if options[:end_at]

  tag_scope = ActsAsTaggableOnPadrino::Tag.select("#{tag_table_name}.*, #{tagging_table_name}.tags_count AS count").order(options[:order]).limit(options[:limit])
  tag_scope.where(options[:conditions]) if options[:conditions]

  # GROUP BY and HAVING clauses:
  at_least  = sanitize_sql(['tags_count >= ?', options.delete(:at_least)]) if options[:at_least]
  at_most   = sanitize_sql(['tags_count <= ?', options.delete(:at_most)]) if options[:at_most]
  having    = ["COUNT(#{tagging_table_name}.tag_id) > 0", at_least, at_most].compact.join(' AND ')

  # Append the current scope to the scope, because we can't use scope(:find) in RoR 3.0 anymore:
  tagging_scope = tagging_scope.where(:taggable_id => select("#{table_name}.#{primary_key}")).
                                group("#{tagging_table_name}.tag_id").
                                having(having)

  tag_scope = tag_scope.joins("JOIN (#{tagging_scope.to_sql}) AS taggings ON taggings.tag_id = tags.id")
  tag_scope
end

#initialize_acts_as_taggable_on_collection ⇒ Object 



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# File 'lib/acts_as_taggable_on_padrino/taggable/collection.rb', line 10

def initialize_acts_as_taggable_on_collection
  tag_types.each do |tag_type|
    singular_tag_type = tag_type.to_s.singularize
    class_eval %(
      def self.#{singular_tag_type}_counts(options={})
        tag_counts_on('#{tag_type}', options)
      end

      def #{singular_tag_type}_counts(options = {})
        tag_counts_on('#{tag_type}', options)
      end

      def top_#{tag_type}(limit = 10)
        tag_counts_on('#{tag_type}', :order => 'count desc', :limit => limit.to_i)
      end

      def self.top_#{tag_type}(limit = 10)
        tag_counts_on('#{tag_type}', :order => 'count desc', :limit => limit.to_i)
      end
    )
  end
end

#tag_counts_on(context, options = {}) ⇒ Object 



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# File 'lib/acts_as_taggable_on_padrino/taggable/collection.rb', line 38

def tag_counts_on(context, options = {})
  all_tag_counts(options.merge({:on => context.to_s}))
end