diff options
Diffstat (limited to 'activemodel/lib/active_model/attribute_methods.rb')
| -rw-r--r-- | activemodel/lib/active_model/attribute_methods.rb | 53 |
1 files changed, 26 insertions, 27 deletions
diff --git a/activemodel/lib/active_model/attribute_methods.rb b/activemodel/lib/active_model/attribute_methods.rb index 98cde8ba59..ea07c5c039 100644 --- a/activemodel/lib/active_model/attribute_methods.rb +++ b/activemodel/lib/active_model/attribute_methods.rb @@ -1,4 +1,5 @@ require 'thread_safe' +require 'mutex_m' module ActiveModel # Raised when an attribute is not defined. @@ -13,11 +14,11 @@ module ActiveModel class MissingAttributeError < NoMethodError end - # == Active \Model Attribute Methods + # == Active \Model \Attribute \Methods # - # <tt>ActiveModel::AttributeMethods</tt> provides a way to add prefixes and - # suffixes to your methods as well as handling the creation of - # <tt>ActiveRecord::Base</tt>-like class methods such as +table_name+. + # Provides a way to add prefixes and suffixes to your methods as + # well as handling the creation of <tt>ActiveRecord::Base</tt>-like + # class methods such as +table_name+. # # The requirements to implement <tt>ActiveModel::AttributeMethods</tt> are to: # @@ -26,7 +27,9 @@ module ActiveModel # or +attribute_method_prefix+. # * Call +define_attribute_methods+ after the other methods are called. # * Define the various generic +_attribute+ methods that you have declared. - # * Define an +attributes+ method, see below. + # * Define an +attributes+ method which returns a hash with each + # attribute name in your model as hash key and the attribute value as hash value. + # Hash keys must be strings. # # A minimal implementation could be: # @@ -41,7 +44,7 @@ module ActiveModel # attr_accessor :name # # def attributes - # {'name' => @name} + # { 'name' => @name } # end # # private @@ -58,13 +61,6 @@ module ActiveModel # send("#{attr}=", 'Default Name') # end # end - # - # Note that whenever you include <tt>ActiveModel::AttributeMethods</tt> in - # your class, it requires you to implement an +attributes+ method which - # returns a hash with each attribute name in your model as hash key and the - # attribute value as hash value. - # - # Hash keys must be strings. module AttributeMethods extend ActiveSupport::Concern @@ -172,14 +168,14 @@ module ActiveModel # private # # def reset_attribute_to_default!(attr) - # ... + # send("#{attr}=", 'Default Name') # end # end # # person = Person.new # person.name # => 'Gem' # person.reset_name_to_default! - # person.name # => 'Gemma' + # person.name # => 'Default Name' def attribute_method_affix(*affixes) self.attribute_method_matchers += affixes.map! { |affix| AttributeMethodMatcher.new prefix: affix[:prefix], suffix: affix[:suffix] } undefine_attribute_methods @@ -218,6 +214,16 @@ module ActiveModel end end + # Is +new_name+ an alias? + def attribute_alias?(new_name) + attribute_aliases.key? new_name.to_s + end + + # Returns the original name for the alias +name+ + def attribute_alias(name) + attribute_aliases[name.to_s] + end + # Declares the attributes that should be prefixed and suffixed by # ActiveModel::AttributeMethods. # @@ -239,7 +245,7 @@ module ActiveModel # private # # def clear_attribute(attr) - # ... + # send("#{attr}=", nil) # end # end def define_attribute_methods(*attr_names) @@ -322,9 +328,10 @@ module ActiveModel attribute_method_matchers_cache.clear end - # Returns true if the attribute methods defined have been generated. def generated_attribute_methods #:nodoc: - @generated_attribute_methods ||= Module.new.tap { |mod| include mod } + @generated_attribute_methods ||= Module.new { + extend Mutex_m + }.tap { |mod| include mod } end protected @@ -337,7 +344,7 @@ module ActiveModel # invoked often in a typical rails, both of which invoke the method # +match_attribute_method?+. The latter method iterates through an # array doing regular expression matches, which results in a lot of - # object creations. Most of the times it returns a +nil+ match. As the + # object creations. Most of the time it returns a +nil+ match. As the # match result is always the same given a +method_name+, this cache is # used to alleviate the GC, which ultimately also speeds up the app # significantly (in our case our test suite finishes 10% faster with @@ -388,14 +395,6 @@ module ActiveModel AttributeMethodMatch = Struct.new(:target, :attr_name, :method_name) def initialize(options = {}) - if options[:prefix] == '' || options[:suffix] == '' - message = "Specifying an empty prefix/suffix for an attribute method is no longer " \ - "necessary. If the un-prefixed/suffixed version of the method has not been " \ - "defined when `define_attribute_methods` is called, it will be defined " \ - "automatically." - ActiveSupport::Deprecation.warn message - end - @prefix, @suffix = options.fetch(:prefix, ''), options.fetch(:suffix, '') @regex = /^(?:#{Regexp.escape(@prefix)})(.*)(?:#{Regexp.escape(@suffix)})$/ @method_missing_target = "#{@prefix}attribute#{@suffix}" |