mirror of
https://github.com/rails/rails.git
synced 2022-11-09 12:12:34 -05:00
108 lines
4.1 KiB
Ruby
108 lines
4.1 KiB
Ruby
require 'active_support/json'
|
|
require 'active_support/core_ext/class/attribute_accessors'
|
|
|
|
module ActiveModel
|
|
module Serializers
|
|
module JSON
|
|
extend ActiveSupport::Concern
|
|
|
|
included do
|
|
extend ActiveModel::Naming
|
|
|
|
cattr_accessor :include_root_in_json, :instance_writer => false
|
|
end
|
|
|
|
class Serializer < ActiveModel::Serializer
|
|
def serializable_hash
|
|
model = super
|
|
@serializable.include_root_in_json ?
|
|
{ @serializable.class.model_name.element => model } :
|
|
model
|
|
end
|
|
|
|
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
|