diff options
Diffstat (limited to 'activemodel/lib/active_model/serialization.rb')
| -rw-r--r-- | activemodel/lib/active_model/serialization.rb | 71 |
1 files changed, 46 insertions, 25 deletions
diff --git a/activemodel/lib/active_model/serialization.rb b/activemodel/lib/active_model/serialization.rb index 51f078e662..8a63014ffb 100644 --- a/activemodel/lib/active_model/serialization.rb +++ b/activemodel/lib/active_model/serialization.rb @@ -1,7 +1,5 @@ require 'active_support/core_ext/hash/except' require 'active_support/core_ext/hash/slice' -require 'active_support/core_ext/array/wrap' - module ActiveModel # == Active Model Serialization @@ -11,7 +9,6 @@ module ActiveModel # A minimal implementation could be: # # class Person - # # include ActiveModel::Serialization # # attr_accessor :name @@ -19,7 +16,6 @@ module ActiveModel # def attributes # {'name' => nil} # end - # # end # # Which would provide you with: @@ -29,21 +25,20 @@ module ActiveModel # person.name = "Bob" # person.serializable_hash # => {"name"=>"Bob"} # - # You need to declare an attributes hash which contains the attributes - # you want to serialize. When called, serializable hash will use - # instance methods that match the name of the attributes hash's keys. - # In order to override this behavior, take a look at the private - # method read_attribute_for_serialization. + # You need to declare an attributes hash which contains the attributes you + # want to serialize. Attributes must be strings, not symbols. When called, + # serializable hash will use instance methods that match the name of the + # attributes hash's keys. In order to override this behavior, take a look at + # the private method +read_attribute_for_serialization+. # # Most of the time though, you will want to include the JSON or XML # serializations. Both of these modules automatically include the - # ActiveModel::Serialization module, so there is no need to explicitly - # include it. + # <tt>ActiveModel::Serialization</tt> module, so there is no need to + # explicitly include it. # - # So a minimal implementation including XML and JSON would be: + # A minimal implementation including XML and JSON would be: # # class Person - # # include ActiveModel::Serializers::JSON # include ActiveModel::Serializers::Xml # @@ -52,7 +47,6 @@ module ActiveModel # def attributes # {'name' => nil} # end - # # end # # Which would provide you with: @@ -69,12 +63,41 @@ module ActiveModel # person.to_json # => "{\"name\":\"Bob\"}" # person.to_xml # => "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<serial-person... # - # Valid options are <tt>:only</tt>, <tt>:except</tt> and <tt>:methods</tt> . + # Valid options are <tt>:only</tt>, <tt>:except</tt>, <tt>:methods</tt> and + # <tt>:include</tt>. The following are all valid examples: + # + # person.serializable_hash(only: 'name') + # person.serializable_hash(include: :address) + # person.serializable_hash(include: { address: { only: 'city' }}) module Serialization + # Returns a serialized hash of your object. + # + # class Person + # include ActiveModel::Serialization + # + # attr_accessor :name, :age + # + # def attributes + # {'name' => nil, 'age' => nil} + # end + # + # def capitalized_name + # name.capitalize + # end + # end + # + # person = Person.new + # person.name = 'bob' + # person.age = 22 + # person.serializable_hash # => {"name"=>"bob", "age"=>22} + # person.serializable_hash(only: :name) # => {"name"=>"bob"} + # person.serializable_hash(except: :name) # => {"age"=>22} + # person.serializable_hash(methods: :capitalized_name) + # # => {"name"=>"bob", "age"=>22, "capitalized_name"=>"Bob"} def serializable_hash(options = nil) options ||= {} - attribute_names = attributes.keys.sort + attribute_names = attributes.keys if only = options[:only] attribute_names &= Array(only).map(&:to_s) elsif except = options[:except] @@ -84,12 +107,11 @@ module ActiveModel hash = {} attribute_names.each { |n| hash[n] = read_attribute_for_serialization(n) } - method_names = Array(options[:methods]).select { |n| respond_to?(n) } - method_names.each { |n| hash[n.to_s] = send(n) } + Array(options[:methods]).each { |m| hash[m.to_s] = send(m) if respond_to?(m) } serializable_add_includes(options) do |association, records, opts| - hash[association] = if records.is_a?(Enumerable) - records.map { |a| a.serializable_hash(opts) } + hash[association.to_s] = if records.respond_to?(:to_ary) + records.to_ary.map { |a| a.serializable_hash(opts) } else records.serializable_hash(opts) end @@ -116,7 +138,6 @@ module ActiveModel # @data[key] # end # end - # alias :read_attribute_for_serialization :send # Add associations specified via the <tt>:include</tt> option. @@ -126,13 +147,13 @@ module ActiveModel # +records+ - the association record(s) to be serialized # +opts+ - options for the association records def serializable_add_includes(options = {}) #:nodoc: - return unless include = options[:include] + return unless includes = options[:include] - unless include.is_a?(Hash) - include = Hash[Array.wrap(include).map { |n| n.is_a?(Hash) ? n.to_a.first : [n, {}] }] + unless includes.is_a?(Hash) + includes = Hash[Array(includes).map { |n| n.is_a?(Hash) ? n.to_a.first : [n, {}] }] end - include.each do |association, opts| + includes.each do |association, opts| if records = send(association) yield association, records, opts end |