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require 'active_support/inflector'
module ActiveModel
class Name < String
attr_reader :singular, :plural, :element, :collection, :partial_path
alias_method :cache_key, :collection
def initialize(klass)
super(klass.name)
@klass = klass
@singular = ActiveSupport::Inflector.underscore(self).tr('/', '_').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
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
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
@_model_name ||= ActiveModel::Name.new(self)
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
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
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