ruby-on-rails - 在每个数组元素中输出不带类名的 JSON 数组

Question

在 Rails 中输出 JSON 的默认方式是这样的:
代码:
render :json => friends.to_json(:only => [:username, :avatar_file_name, :id ])

输出

{"friends" :   [{"user":     {"avatar_file_name": "image1.jpg", "username": "user1", "id": 1}},   {"user":     {"avatar_file_name": "image2.jpg", "username": "user2", "id": 2}},   {"user":    {"avatar_file_name": "image3.jpg", "username": "user3", "id": 3}}  ]}

但我想要这样的东西:

{"friends" :     {"user": [      {"avatar_file_name": "image1.jpg", "username": "user1", "id": 1},      {"avatar_file_name": "image2.jpg", "username": "user2", "id": 2},      {"avatar_file_name": "image3.jpg", "username": "user3", "id": 3}    ]}}

类由数组名指定。
Last.fm 也使用此语法，请参阅 Last.fm 'API-user.getfriends'

Answer 1

这个问题的解决方法是注释行
ActiveRecord::Base.include_root_in_json = true
在 initializers/new_rails_defaults.rb

或者将 ActiveRecord::Base.include_root_in_json 设置为 false。