diff options
Diffstat (limited to 'activemodel/lib/active_model/conversion.rb')
| -rw-r--r-- | activemodel/lib/active_model/conversion.rb | 28 |
1 files changed, 26 insertions, 2 deletions
diff --git a/activemodel/lib/active_model/conversion.rb b/activemodel/lib/active_model/conversion.rb index 1405b1bfe3..80a3ba51c3 100644 --- a/activemodel/lib/active_model/conversion.rb +++ b/activemodel/lib/active_model/conversion.rb @@ -1,9 +1,12 @@ +require 'active_support/concern' +require 'active_support/inflector' + module ActiveModel # == Active Model Conversions # - # Handles default conversions: to_model, to_key and to_param. + # Handles default conversions: to_model, to_key, to_param, and to_partial_path. # - # Let's take for example this non persisted object. + # Let's take for example this non-persisted object. # # class ContactMessage # include ActiveModel::Conversion @@ -18,8 +21,11 @@ module ActiveModel # cm.to_model == self # => true # cm.to_key # => nil # cm.to_param # => nil + # cm.to_path # => "contact_messages/contact_message" # module Conversion + extend ActiveSupport::Concern + # If your object is already designed to implement all of the Active Model # you can use the default <tt>:to_model</tt> implementation, which simply # returns self. @@ -45,5 +51,23 @@ module ActiveModel def to_param persisted? ? to_key.join('-') : nil end + + # Returns a string identifying the path associated with the object. + # ActionPack uses this to find a suitable partial to represent the object. + def to_partial_path + self.class._to_partial_path + end + + module ClassMethods #:nodoc: + # Provide a class level cache for the to_path. This is an + # internal method and should not be accessed directly. + def _to_partial_path #:nodoc: + @_to_partial_path ||= begin + element = ActiveSupport::Inflector.underscore(ActiveSupport::Inflector.demodulize(self)) + collection = ActiveSupport::Inflector.tableize(self) + "#{collection}/#{element}".freeze + end + end + end end end |