diff options
Diffstat (limited to 'activemodel/lib/active_model/serializers/json.rb')
| -rw-r--r-- | activemodel/lib/active_model/serializers/json.rb | 101 |
1 files changed, 86 insertions, 15 deletions
diff --git a/activemodel/lib/active_model/serializers/json.rb b/activemodel/lib/active_model/serializers/json.rb index 60b5cbe948..adf200597d 100644 --- a/activemodel/lib/active_model/serializers/json.rb +++ b/activemodel/lib/active_model/serializers/json.rb @@ -1,7 +1,5 @@ require 'active_support/json' require 'active_support/core_ext/class/attribute_accessors' -require 'active_support/core_ext/hash/except' -require 'active_support/core_ext/hash/slice' module ActiveModel module Serializers @@ -10,29 +8,102 @@ module ActiveModel include ActiveModel::Attributes included do + extend ActiveModel::Naming + cattr_accessor :include_root_in_json, :instance_writer => false end - def encode_json(encoder) - options = encoder.options || {} - - hash = if options[:only] - only = Array.wrap(options[:only]).map { |attr| attr.to_s } - attributes.slice(*only) - elsif options[:except] - except = Array.wrap(options[:except]).map { |attr| attr.to_s } - attributes.except(*except) - else - attributes + class Serializer < ActiveModel::Serializer + def serializable_hash + model = super + @serializable.include_root_in_json ? + { @serializable.class.model_name.element => model } : + model end - hash = { self.class.model_name.element => hash } if include_root_in_json - ActiveSupport::JSON.encode(hash) + def serialize + ActiveSupport::JSON.encode(serializable_hash) + end + end + + # Returns a JSON string representing the model. Some configuration is + # available through +options+. + # + # The option <tt>ActiveRecord::Base.include_root_in_json</tt> controls the + # top-level behavior of to_json. In a new Rails application, it is set to + # <tt>true</tt> in initializers/new_rails_defaults.rb. When it is <tt>true</tt>, + # to_json will emit a single root node named after the object's type. For example: + # + # konata = User.find(1) + # ActiveRecord::Base.include_root_in_json = true + # konata.to_json + # # => { "user": {"id": 1, "name": "Konata Izumi", "age": 16, + # "created_at": "2006/08/01", "awesome": true} } + # + # ActiveRecord::Base.include_root_in_json = false + # konata.to_json + # # => {"id": 1, "name": "Konata Izumi", "age": 16, + # "created_at": "2006/08/01", "awesome": true} + # + # The remainder of the examples in this section assume include_root_in_json is set to + # <tt>false</tt>. + # + # Without any +options+, the returned JSON string will include all + # the model's attributes. For example: + # + # konata = User.find(1) + # konata.to_json + # # => {"id": 1, "name": "Konata Izumi", "age": 16, + # "created_at": "2006/08/01", "awesome": true} + # + # The <tt>:only</tt> and <tt>:except</tt> options can be used to limit the attributes + # included, and work similar to the +attributes+ method. For example: + # + # konata.to_json(:only => [ :id, :name ]) + # # => {"id": 1, "name": "Konata Izumi"} + # + # konata.to_json(:except => [ :id, :created_at, :age ]) + # # => {"name": "Konata Izumi", "awesome": true} + # + # To include any methods on the model, use <tt>:methods</tt>. + # + # konata.to_json(:methods => :permalink) + # # => {"id": 1, "name": "Konata Izumi", "age": 16, + # "created_at": "2006/08/01", "awesome": true, + # "permalink": "1-konata-izumi"} + # + # To include associations, use <tt>:include</tt>. + # + # konata.to_json(:include => :posts) + # # => {"id": 1, "name": "Konata Izumi", "age": 16, + # "created_at": "2006/08/01", "awesome": true, + # "posts": [{"id": 1, "author_id": 1, "title": "Welcome to the weblog"}, + # {"id": 2, author_id: 1, "title": "So I was thinking"}]} + # + # 2nd level and higher order associations work as well: + # + # konata.to_json(:include => { :posts => { + # :include => { :comments => { + # :only => :body } }, + # :only => :title } }) + # # => {"id": 1, "name": "Konata Izumi", "age": 16, + # "created_at": "2006/08/01", "awesome": true, + # "posts": [{"comments": [{"body": "1st post!"}, {"body": "Second!"}], + # "title": "Welcome to the weblog"}, + # {"comments": [{"body": "Don't think too hard"}], + # "title": "So I was thinking"}]} + def encode_json(encoder) + Serializer.new(self, encoder.options).to_s end def as_json(options = nil) self end + + def from_json(json) + self.attributes = ActiveSupport::JSON.decode(json) + self + end end end end |