require 'active_support/inflector' module ActiveModel class Name < String attr_reader :singular, :plural, :element, :collection, :partial_path, :route_key, :param_key alias_method :cache_key, :collection def initialize(klass, namespace = nil) super(klass.name) @unnamespaced = self.sub(/^#{namespace.name}::/, '') if namespace @klass = klass @singular = _singularize(self).freeze @plural = ActiveSupport::Inflector.pluralize(@singular).freeze @element = ActiveSupport::Inflector.underscore(ActiveSupport::Inflector.demodulize(self)).freeze @human = ActiveSupport::Inflector.humanize(@element).freeze @collection = ActiveSupport::Inflector.tableize(self).freeze @partial_path = "#{@collection}/#{@element}".freeze @param_key = (namespace ? _singularize(@unnamespaced) : @singular).freeze @route_key = (namespace ? ActiveSupport::Inflector.pluralize(@param_key) : @plural).freeze end # Transform the model name into a more humane format, using I18n. By default, # it will underscore then humanize the class name # # BlogPost.model_name.human # => "Blog post" # # Specify +options+ with additional translating options. def human(options={}) return @human unless @klass.respond_to?(:lookup_ancestors) && @klass.respond_to?(:i18n_scope) defaults = @klass.lookup_ancestors.map do |klass| klass.model_name.underscore.to_sym end defaults << options.delete(:default) if options[:default] defaults << @human options.reverse_merge! :scope => [@klass.i18n_scope, :models], :count => 1, :default => defaults I18n.translate(defaults.shift, options) end private def _singularize(str) ActiveSupport::Inflector.underscore(str).tr('/', '_') end end # == Active Model Naming # # Creates a +model_name+ method on your object. # # To implement, just extend ActiveModel::Naming in your object: # # class BookCover # extend ActiveModel::Naming # end # # BookCover.model_name # => "BookCover" # BookCover.model_name.human # => "Book cover" # # Providing the functionality that ActiveModel::Naming provides in your object # is required to pass the Active Model Lint test. So either extending the provided # method below, or rolling your own is required.. module Naming # Returns an ActiveModel::Name object for module. It can be # used to retrieve all kinds of naming-related information. def model_name namespace = self.parents.detect { |n| n.respond_to?(:_railtie) } @_model_name ||= ActiveModel::Name.new(self, namespace) end # Returns the plural class name of a record or class. Examples: # # ActiveModel::Naming.plural(post) # => "posts" # ActiveModel::Naming.plural(Highrise::Person) # => "highrise_people" def self.plural(record_or_class) model_name_from_record_or_class(record_or_class).plural end # Returns the singular class name of a record or class. Examples: # # ActiveModel::Naming.singular(post) # => "post" # ActiveModel::Naming.singular(Highrise::Person) # => "highrise_person" def self.singular(record_or_class) model_name_from_record_or_class(record_or_class).singular end # Identifies whether the class name of a record or class is uncountable. Examples: # # ActiveModel::Naming.uncountable?(Sheep) # => true # ActiveModel::Naming.uncountable?(Post) => false def self.uncountable?(record_or_class) plural(record_or_class) == singular(record_or_class) end # Returns string to use while generating route names. It differs for # namespaced models regarding whether it's inside isolated engine. # # For isolated engine: # ActiveModel::Naming.route_key(Blog::Post) #=> posts # # For shared engine: # ActiveModel::Naming.route_key(Blog::Post) #=> blog_posts def self.route_key(record_or_class) model_name_from_record_or_class(record_or_class).route_key end # Returns string to use for params names. It differs for # namespaced models regarding whether it's inside isolated engine. # # For isolated engine: # ActiveModel::Naming.param_key(Blog::Post) #=> post # # For shared engine: # ActiveModel::Naming.param_key(Blog::Post) #=> blog_post def self.param_key(record_or_class) model_name_from_record_or_class(record_or_class).param_key end private def self.model_name_from_record_or_class(record_or_class) (record_or_class.is_a?(Class) ? record_or_class : record_or_class.class).model_name end end end