class ActsAsTaggableOn::Tag

Public Class Methods

find_or_create_all_with_like_by_name(*list) click to toggle source
# File lib/acts_as_taggable_on/tag.rb, line 67
def self.find_or_create_all_with_like_by_name(*list)
  list = Array(list).flatten

  return [] if list.empty?

  existing_tags = named_any(list)

  list.map do |tag_name|
    comparable_tag_name = comparable_name(tag_name)
    existing_tag = existing_tags.find { |tag| comparable_name(tag.name) == comparable_tag_name }
    begin
      existing_tag || create(name: tag_name)
    rescue ActiveRecord::RecordNotUnique
      # Postgres aborts the current transaction with
      # PG::InFailedSqlTransaction: ERROR:  current transaction is aborted, commands ignored until end of transaction block
      # so we have to rollback this transaction
      raise DuplicateTagError.new("'#{tag_name}' has already been taken")
    end
  end
end
find_or_create_with_like_by_name(name) click to toggle source

CLASS METHODS:

# File lib/acts_as_taggable_on/tag.rb, line 59
def self.find_or_create_with_like_by_name(name)
  if ActsAsTaggableOn.strict_case_match
    self.find_or_create_all_with_like_by_name([name]).first
  else
    named_like(name).first || create(name: name)
  end
end
named(name) click to toggle source

SCOPES:

# File lib/acts_as_taggable_on/tag.rb, line 23
def self.named(name)
  if ActsAsTaggableOn.strict_case_match
    where(["name = #{binary}?", as_8bit_ascii(name)])
  else
    where(['LOWER(name) = LOWER(?)', as_8bit_ascii(unicode_downcase(name))])
  end
end
named_any(list) click to toggle source
# File lib/acts_as_taggable_on/tag.rb, line 31
def self.named_any(list)
  if ActsAsTaggableOn.strict_case_match
    clause = list.map { |tag|
      sanitize_sql(["name = #{binary}?", as_8bit_ascii(tag)])
    }.join(' OR ')
    where(clause)
  else
    clause = list.map { |tag|
      sanitize_sql(['LOWER(name) = LOWER(?)', as_8bit_ascii(unicode_downcase(tag))])
    }.join(' OR ')
    where(clause)
  end
end
named_like(name) click to toggle source
# File lib/acts_as_taggable_on/tag.rb, line 45
def self.named_like(name)
  clause = ["name #{ActsAsTaggableOn::Utils.like_operator} ? ESCAPE '!'", "%#{ActsAsTaggableOn::Utils.escape_like(name)}%"]
  where(clause)
end
named_like_any(list) click to toggle source
# File lib/acts_as_taggable_on/tag.rb, line 50
def self.named_like_any(list)
  clause = list.map { |tag|
    sanitize_sql(["name #{ActsAsTaggableOn::Utils.like_operator} ? ESCAPE '!'", "%#{ActsAsTaggableOn::Utils.escape_like(tag.to_s)}%"])
  }.join(' OR ')
  where(clause)
end

Public Instance Methods

==(object) click to toggle source

INSTANCE METHODS:

Calls superclass method
# File lib/acts_as_taggable_on/tag.rb, line 90
def ==(object)
  super || (object.is_a?(Tag) && name == object.name)
end
count() click to toggle source
# File lib/acts_as_taggable_on/tag.rb, line 98
def count
  read_attribute(:count).to_i
end
to_s() click to toggle source
# File lib/acts_as_taggable_on/tag.rb, line 94
def to_s
  name
end
validates_name_uniqueness?() click to toggle source

monkey patch this method if don't need name uniqueness validation

# File lib/acts_as_taggable_on/tag.rb, line 17
def validates_name_uniqueness?
  true
end

Private Instance Methods

as_8bit_ascii(string) click to toggle source
# File lib/acts_as_taggable_on/tag.rb, line 125
def as_8bit_ascii(string)
  if defined?(Encoding)
    string.to_s.dup.force_encoding('BINARY')
  else
    string.to_s.mb_chars
  end
end
binary() click to toggle source
# File lib/acts_as_taggable_on/tag.rb, line 113
def binary
  ActsAsTaggableOn::Utils.using_mysql? ? 'BINARY ' : nil
end
comparable_name(str) click to toggle source
# File lib/acts_as_taggable_on/tag.rb, line 105
def comparable_name(str)
  if ActsAsTaggableOn.strict_case_match
    str
  else
    unicode_downcase(str.to_s)
  end
end
unicode_downcase(string) click to toggle source
# File lib/acts_as_taggable_on/tag.rb, line 117
def unicode_downcase(string)
  if ActiveSupport::Multibyte::Unicode.respond_to?(:downcase)
    ActiveSupport::Multibyte::Unicode.downcase(string)
  else
    ActiveSupport::Multibyte::Chars.new(string).downcase.to_s
  end
end