Module: ActsAsTaggableOn::Taggable::Core::ClassMethods

Defined in:
lib/acts_as_taggable_on/taggable/core.rb

Instance Method Summary collapse

Instance Method Details

#grouped_column_names_for(object) ⇒ Object

all column names are necessary for PostgreSQL group clause



84
85
86
 
# File 'lib/acts_as_taggable_on/taggable/core.rb', line 84

def grouped_column_names_for(object)
  object.column_names.map { |column| "#{object.table_name}.#{column}" }.join(', ')
end

#initialize_acts_as_taggable_on_core ⇒ Object 



22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
 
# File 'lib/acts_as_taggable_on/taggable/core.rb', line 22

def initialize_acts_as_taggable_on_core
  include taggable_mixin
  tag_types.map(&:to_s).each do |tags_type|
    tag_type = tags_type.to_s.singularize
    context_taggings = "#{tag_type}_taggings".to_sym
    context_tags = tags_type.to_sym
    taggings_order = (preserve_tag_order? ? "#{ActsAsTaggableOn::Tagging.table_name}.id" : [])

    class_eval do
      # when preserving tag order, include order option so that for a 'tags' context
      # the associations tag_taggings & tags are always returned in created order
      has_many context_taggings, -> { includes(:tag).order(taggings_order).where(context: tags_type) },
               as: :taggable,
               class_name: 'ActsAsTaggableOn::Tagging',
               dependent: :destroy,
               after_add: :dirtify_tag_list,
               after_remove: :dirtify_tag_list

      has_many context_tags, -> { order(taggings_order) },
               class_name: 'ActsAsTaggableOn::Tag',
               through: context_taggings,
               source: :tag

      attribute "#{tags_type.singularize}_list".to_sym, ActsAsTaggableOn::Taggable::TagListType.new
    end

    taggable_mixin.class_eval <<-RUBY, __FILE__, __LINE__ + 1
    def #{tag_type}_list
      tag_list_on('#{tags_type}')
    end

    def #{tag_type}_list=(new_tags)
      parsed_new_list = ActsAsTaggableOn.default_parser.new(new_tags).parse

      if self.class.preserve_tag_order? || (parsed_new_list.sort != #{tag_type}_list.sort)
        unless #{tag_type}_list_changed?
          @attributes["#{tag_type}_list"] = ActiveModel::Attribute.from_user("#{tag_type}_list", #{tag_type}_list, ActsAsTaggableOn::Taggable::TagListType.new)
        end
        write_attribute("#{tag_type}_list", parsed_new_list)
      end

      set_tag_list_on('#{tags_type}', new_tags)
    end

    def all_#{tags_type}_list
      all_tags_list_on('#{tags_type}')
    end

    private
    def dirtify_tag_list(tagging)
      attribute_will_change! tagging.context.singularize+"_list"
    end
    RUBY
  end
end

#is_taggable? ⇒ Boolean

Returns:

  • (Boolean) 


119
120
121
 
# File 'lib/acts_as_taggable_on/taggable/core.rb', line 119

def is_taggable?
  true
end

#taggable_mixin ⇒ Object 



123
124
125
 
# File 'lib/acts_as_taggable_on/taggable/core.rb', line 123

def taggable_mixin
  @taggable_mixin ||= Module.new
end

#taggable_on(preserve_tag_order, *tag_types) ⇒ Object 



78
79
80
81
 
# File 'lib/acts_as_taggable_on/taggable/core.rb', line 78

def taggable_on(preserve_tag_order, *tag_types)
  super(preserve_tag_order, *tag_types)
  initialize_acts_as_taggable_on_core
end

#tagged_with(tags, options = {}) ⇒ Object

Return a scope of objects that are tagged with the specified tags.

Example:

User.tagged_with(["awesome", "cool"])                     # Users that are tagged with awesome and cool
User.tagged_with(["awesome", "cool"], :exclude => true)   # Users that are not tagged with awesome or cool
User.tagged_with(["awesome", "cool"], :any => true)       # Users that are tagged with awesome or cool
User.tagged_with(["awesome", "cool"], :any => true, :order_by_matching_tag_count => true)  # Sort by users who match the most tags, descending
User.tagged_with(["awesome", "cool"], :match_all => true) # Users that are tagged with just awesome and cool
User.tagged_with(["awesome", "cool"], :owned_by => foo ) # Users that are tagged with just awesome and cool by 'foo'
User.tagged_with(["awesome", "cool"], :owned_by => foo, :start_at => Date.today ) # Users that are tagged with just awesome, cool by 'foo' and starting today

Parameters:

  • tags —

    The tags that we want to query for

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

    A hash of options to alter you query:

    • :exclude - if set to true, return objects that are NOT tagged with the specified tags

    • :any - if set to true, return objects that are tagged with ANY of the specified tags

    • :order_by_matching_tag_count - if set to true and used with :any, sort by objects matching the most tags, descending

    • :match_all - if set to true, return objects that are ONLY tagged with the specified tags

    • :owned_by - return objects that are ONLY owned by the owner

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

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



109
110
111
112
113
114
115
116
117
 
# File 'lib/acts_as_taggable_on/taggable/core.rb', line 109

def tagged_with(tags, options = {})
  tag_list = ActsAsTaggableOn.default_parser.new(tags).parse
  options = options.dup

  return none if tag_list.empty?

  ::ActsAsTaggableOn::Taggable::TaggedWithQuery.build(self, ActsAsTaggableOn::Tag, ActsAsTaggableOn::Tagging,
                                                      tag_list, options)
end