diff options
Diffstat (limited to 'activemodel/lib/active_model/serialization.rb')
| -rw-r--r-- | activemodel/lib/active_model/serialization.rb | 57 |
1 files changed, 42 insertions, 15 deletions
diff --git a/activemodel/lib/active_model/serialization.rb b/activemodel/lib/active_model/serialization.rb index 36a6c00290..70e10fa06d 100644 --- a/activemodel/lib/active_model/serialization.rb +++ b/activemodel/lib/active_model/serialization.rb @@ -4,7 +4,7 @@ require 'active_support/core_ext/hash/slice' module ActiveModel # == Active \Model \Serialization # - # Provides a basic serialization to a serializable_hash for your object. + # Provides a basic serialization to a serializable_hash for your objects. # # A minimal implementation could be: # @@ -25,22 +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. 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+. + # An +attributes+ hash must be defined and should contain any attributes you + # need to be serialized. 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 - # <tt>ActiveModel::Serialization</tt> module, so there is no need to - # explicitly include it. + # ActiveModel::Serializers::JSON module automatically includes + # the <tt>ActiveModel::Serialization</tt> module, so there is no need to + # explicitly include <tt>ActiveModel::Serialization</tt>. # - # A minimal implementation including XML and JSON would be: + # A minimal implementation including JSON would be: # # class Person # include ActiveModel::Serializers::JSON - # include ActiveModel::Serializers::Xml # # attr_accessor :name # @@ -55,13 +53,11 @@ module ActiveModel # person.serializable_hash # => {"name"=>nil} # person.as_json # => {"name"=>nil} # person.to_json # => "{\"name\":null}" - # person.to_xml # => "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<serial-person... # # person.name = "Bob" # person.serializable_hash # => {"name"=>"Bob"} # person.as_json # => {"name"=>"Bob"} # 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>, <tt>:methods</tt> and # <tt>:include</tt>. The following are all valid examples: @@ -94,6 +90,37 @@ module ActiveModel # person.serializable_hash(except: :name) # => {"age"=>22} # person.serializable_hash(methods: :capitalized_name) # # => {"name"=>"bob", "age"=>22, "capitalized_name"=>"Bob"} + # + # Example with <tt>:include</tt> option + # + # class User + # include ActiveModel::Serializers::JSON + # attr_accessor :name, :notes # Emulate has_many :notes + # def attributes + # {'name' => nil} + # end + # end + # + # class Note + # include ActiveModel::Serializers::JSON + # attr_accessor :title, :text + # def attributes + # {'title' => nil, 'text' => nil} + # end + # end + # + # note = Note.new + # note.title = 'Battle of Austerlitz' + # note.text = 'Some text here' + # + # user = User.new + # user.name = 'Napoleon' + # user.notes = [note] + # + # user.serializable_hash + # # => {"name" => "Napoleon"} + # user.serializable_hash(include: { notes: { only: 'title' }}) + # # => {"name" => "Napoleon", "notes" => [{"title"=>"Battle of Austerlitz"}]} def serializable_hash(options = nil) options ||= {} @@ -107,7 +134,7 @@ module ActiveModel hash = {} attribute_names.each { |n| hash[n] = read_attribute_for_serialization(n) } - Array(options[:methods]).each { |m| hash[m.to_s] = send(m) if respond_to?(m) } + Array(options[:methods]).each { |m| hash[m.to_s] = send(m) } serializable_add_includes(options) do |association, records, opts| hash[association.to_s] = if records.respond_to?(:to_ary) |