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require 'active_support/inflector'
module ActiveModel
class Name < String
attr_reader :singular, :plural, :element
def initialize(klass)
super(klass.name)
@klass = klass
@singular = ActiveSupport::Inflector.underscore(self).tr('/', '_').freeze
@plural = ActiveSupport::Inflector.pluralize(@singular).freeze
@collection = nil
self.element = ActiveSupport::Inflector.underscore(ActiveSupport::Inflector.demodulize(self)).freeze
end
def element=(element)
@element = element
@human = ActiveSupport::Inflector.humanize(@element).freeze
@default_collection = nil
@partial_path = nil
end
def collection
@collection || default_collection
end
alias_method :cache_key, :collection
def collection=(collection)
@collection = collection
@partial_path = nil
end
def partial_path
@partial_path ||= "#{collection}/#{@element}"
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 default_collection
@default_collection ||= ActiveSupport::Inflector.tableize(self.sub(/[^:]*$/, @element)).freeze
end
end
# ActiveModel::Naming is a module that 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 ActiveModel 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
end
end
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