Module: ActiveRecord::Acts::TaggableOn::SingletonMethods
- Defined in:
- lib/acts_as_taggable_on/acts_as_taggable_on.rb
Instance Method Summary collapse
- #all_tag_counts(options = {}) ⇒ Object
- #caching_tag_list_on?(context) ⇒ Boolean
- #find_options_for_find_tagged_with(tags, options = {}) ⇒ Object
-
#find_options_for_tag_counts(options = {}) ⇒ Object
Calculate the tag counts for all tags.
-
#find_tagged_with(*args) ⇒ Object
Pass either a tag string, or an array of strings or tags.
- #is_taggable? ⇒ Boolean
- #tag_counts_on(context, options = {}) ⇒ Object
Instance Method Details
#all_tag_counts(options = {}) ⇒ Object
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# File 'lib/acts_as_taggable_on/acts_as_taggable_on.rb', line 132 def all_tag_counts( = {}) Tag.find(:all, ()) end |
#caching_tag_list_on?(context) ⇒ Boolean
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# File 'lib/acts_as_taggable_on/acts_as_taggable_on.rb', line 124 def caching_tag_list_on?(context) column_names.include?("cached_#{context.to_s.singularize}_list") end |
#find_options_for_find_tagged_with(tags, options = {}) ⇒ Object
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# File 'lib/acts_as_taggable_on/acts_as_taggable_on.rb', line 136 def (, = {}) = TagList.from() return {} if .empty? joins = [] conditions = [] context = .delete(:on) if .delete(:exclude) = .map { |t| sanitize_sql(["#{Tag.table_name}.name LIKE ?", t]) }.join(" OR ") conditions << "#{table_name}.#{primary_key} NOT IN (SELECT #{Tagging.table_name}.taggable_id FROM #{Tagging.table_name} JOIN #{Tag.table_name} ON #{Tagging.table_name}.tag_id = #{Tag.table_name}.id AND (#{}) WHERE #{Tagging.table_name}.taggable_type = #{quote_value(base_class.name)})" else .each do |tag| safe_tag = tag.gsub(/[^a-zA-Z0-9]/, '') prefix = "#{safe_tag}_#{rand(1024)}" taggings_alias = "#{table_name}_taggings_#{prefix}" = "#{table_name}_tags_#{prefix}" tagging_join = "JOIN #{Tagging.table_name} #{taggings_alias}" + " ON #{taggings_alias}.taggable_id = #{table_name}.#{primary_key}" + " AND #{taggings_alias}.taggable_type = #{quote_value(base_class.name)}" tagging_join << " AND " + sanitize_sql(["#{taggings_alias}.context = ?", context.to_s]) if context tag_join = "JOIN #{Tag.table_name} #{}" + " ON #{}.id = #{taggings_alias}.tag_id" + " AND " + sanitize_sql(["#{}.name like ?", tag]) joins << tagging_join joins << tag_join end end taggings_alias, = "#{table_name}_taggings_group", "#{table_name}_tags_group" if .delete(:match_all) joins << "LEFT OUTER JOIN #{Tagging.table_name} #{taggings_alias}" + " ON #{taggings_alias}.taggable_id = #{table_name}.#{primary_key}" + " AND #{taggings_alias}.taggable_type = #{quote_value(base_class.name)}" group = "#{table_name}.#{primary_key} HAVING COUNT(#{taggings_alias}.taggable_id) = #{.size}" end { :joins => joins.join(" "), :group => group, :conditions => conditions.join(" AND ") }.update() end |
#find_options_for_tag_counts(options = {}) ⇒ Object
Calculate the tag counts for all tags.
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/acts_as_taggable_on.rb', line 199 def ( = {}) .assert_valid_keys :start_at, :end_at, :conditions, :at_least, :at_most, :order, :limit, :on, :id scope = scope(:find) start_at = sanitize_sql(["#{Tagging.table_name}.created_at >= ?", .delete(:start_at)]) if [:start_at] end_at = sanitize_sql(["#{Tagging.table_name}.created_at <= ?", .delete(:end_at)]) if [:end_at] taggable_type = sanitize_sql(["#{Tagging.table_name}.taggable_type = ?", base_class.name]) taggable_id = sanitize_sql(["#{Tagging.table_name}.taggable_id = ?", .delete(:id)]) if [:id] [:conditions] = sanitize_sql([:conditions]) if [:conditions] conditions = [ taggable_type, taggable_id, [:conditions], start_at, end_at ] conditions = conditions.compact.join(' AND ') conditions = merge_conditions(conditions, scope[:conditions]) if scope joins = ["LEFT OUTER JOIN #{Tagging.table_name} ON #{Tag.table_name}.id = #{Tagging.table_name}.tag_id"] joins << sanitize_sql(["AND #{Tagging.table_name}.context = ?",.delete(:on).to_s]) unless [:on].nil? joins << " INNER JOIN #{table_name} ON #{table_name}.#{primary_key} = #{Tagging.table_name}.taggable_id" unless self.descends_from_active_record? # Current model is STI descendant, so add type checking to the join condition joins << " AND #{table_name}.#{self.inheritance_column} = '#{self.name}'" end joins << scope[:joins] if scope && scope[:joins] at_least = sanitize_sql(['COUNT(*) >= ?', .delete(:at_least)]) if [:at_least] at_most = sanitize_sql(['COUNT(*) <= ?', .delete(:at_most)]) if [:at_most] having = [at_least, at_most].compact.join(' AND ') group_by = "#{Tag.table_name}.id HAVING COUNT(*) > 0" group_by << " AND #{having}" unless having.blank? { :select => "#{Tag.table_name}.*, COUNT(*) AS count", :joins => joins.join(" "), :conditions => conditions, :group => group_by, :limit => [:limit], :order => [:order] } end |
#find_tagged_with(*args) ⇒ Object
Pass either a tag string, or an array of strings or tags
Options:
:exclude - Find models that are not tagged with the given tags
:match_all - Find models that match all of the given tags, not just one
:conditions - A piece of SQL conditions to add to the query
:on - scopes the find to a context
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# File 'lib/acts_as_taggable_on/acts_as_taggable_on.rb', line 119 def find_tagged_with(*args) = (*args) .blank? ? [] : find(:all,) end |
#is_taggable? ⇒ Boolean
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# File 'lib/acts_as_taggable_on/acts_as_taggable_on.rb', line 247 def is_taggable? true end |
#tag_counts_on(context, options = {}) ⇒ Object
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# File 'lib/acts_as_taggable_on/acts_as_taggable_on.rb', line 128 def tag_counts_on(context, = {}) Tag.find(:all, (.merge({:on => context.to_s}))) end |