class ActiveModel::Name

Returns a new ActiveModel::Name instance. By default, the namespace and name option will take the namespace and name of the given class respectively. Use locale argument for singularize and pluralize model name.

module Foo
  class Bar
  end
end

ActiveModel::Name.new(Foo::Bar).to_s
# => "Foo::Bar"

# File activemodel/lib/active_model/naming.rb, line 166
def initialize(klass, namespace = nil, name = nil, locale = :en)
  @name = name || klass.name

  raise ArgumentError, "Class name cannot be blank. You need to supply a name argument when anonymous class given" if @name.blank?

  @unnamespaced = @name.delete_prefix("#{namespace.name}::") if namespace
  @klass        = klass
  @singular     = _singularize(@name)
  @plural       = ActiveSupport::Inflector.pluralize(@singular, locale)
  @uncountable  = @plural == @singular
  @element      = ActiveSupport::Inflector.underscore(ActiveSupport::Inflector.demodulize(@name))
  @human        = ActiveSupport::Inflector.humanize(@element)
  @collection   = ActiveSupport::Inflector.tableize(@name)
  @param_key    = (namespace ? _singularize(@unnamespaced) : @singular)
  @i18n_key     = @name.underscore.to_sym

  @route_key          = (namespace ? ActiveSupport::Inflector.pluralize(@param_key, locale) : @plural.dup)
  @singular_route_key = ActiveSupport::Inflector.singularize(@route_key, locale)
  @route_key << "_index" if @uncountable
end

Equivalent to String#!~. Match the class name against the given regexp. Returns true if there is no match, otherwise false.

class BlogPost
  extend ActiveModel::Naming
end

BlogPost.model_name !~ /Post/ # => false
BlogPost.model_name !~ /\d/   # => true

# File activemodel/lib/active_model/naming.rb, line 83
    

Equivalent to String#<=>.

class BlogPost
  extend ActiveModel::Naming
end

BlogPost.model_name <=> 'BlogPost'  # => 0
BlogPost.model_name <=> 'Blog'      # => 1
BlogPost.model_name <=> 'BlogPosts' # => -1

# File activemodel/lib/active_model/naming.rb, line 50
    

Equivalent to String#==. Returns true if the class name and other are equal, otherwise false.

class BlogPost
  extend ActiveModel::Naming
end

BlogPost.model_name == 'BlogPost'  # => true
BlogPost.model_name == 'Blog Post' # => false

# File activemodel/lib/active_model/naming.rb, line 19
    

Equivalent to ==.

class BlogPost
  extend ActiveModel::Naming
end

BlogPost.model_name === 'BlogPost'  # => true
BlogPost.model_name === 'Blog Post' # => false

# File activemodel/lib/active_model/naming.rb, line 35
    

Equivalent to String#=~. Match the class name against the given regexp. Returns the position where the match starts or nil if there is no match.

class BlogPost
  extend ActiveModel::Naming
end

BlogPost.model_name =~ /Post/ # => 4
BlogPost.model_name =~ /\d/   # => nil

# File activemodel/lib/active_model/naming.rb, line 66
    

Equivalent to String#eql?. Returns true if the class name and other have the same length and content, otherwise false.

class BlogPost
  extend ActiveModel::Naming
end

BlogPost.model_name.eql?('BlogPost')  # => true
BlogPost.model_name.eql?('Blog Post') # => false

# File activemodel/lib/active_model/naming.rb, line 99
    

Transform the model name into a more human format, using I18n. By default, it will underscore then humanize the class name.

class BlogPost
  extend ActiveModel::Naming
end

BlogPost.model_name.human # => "Blog post"

Specify options with additional translating options.

# File activemodel/lib/active_model/naming.rb, line 197
def human(options = {})
  return @human if i18n_keys.empty? || i18n_scope.empty?

  key, *defaults = i18n_keys
  defaults << options[:default] if options[:default]
  defaults << MISSING_TRANSLATION

  translation = I18n.translate(key, scope: i18n_scope, count: 1, **options, default: defaults)
  translation = @human if translation == MISSING_TRANSLATION
  translation
end

Equivalent to String#match?. Match the class name against the given regexp. Returns true if there is a match, otherwise false.

class BlogPost
  extend ActiveModel::Naming
end

BlogPost.model_name.match?(/Post/) # => true
BlogPost.model_name.match?(/\d/) # => false

# File activemodel/lib/active_model/naming.rb, line 115
    

Returns the class name.

class BlogPost
  extend ActiveModel::Naming
end

BlogPost.model_name.to_s # => "BlogPost"

# File activemodel/lib/active_model/naming.rb, line 131
    

Equivalent to to_s.

# File activemodel/lib/active_model/naming.rb, line 151
delegate :==, :===, :<=>, :=~, :"!~", :eql?, :match?, :to_s,
         :to_str, :as_json, to: :name