ruby-on-rails – 将所有控制器参数从camelCase转换为Rails中的snake_case是最好的方法？

{
  ...
  "firstName": "John","lastName": "Smith","moreInfo":
  {
    "mealType": 2,"mealSize": 4,...
  }
}

{
  ...
  "first_name": "John","last_name": "Smith","more_info":
  {
    "meal_type": 2,"meal_size": 4,...
  }
}

完成以下步骤后,通过JSON请求提交的camelCase参数名称将更改为snake_case.

例如,一个名为passwordConfirmation的JSON请求参数将在控制器中作为params [：password_confirmation]

在config / initializers / json_param_key_transform.rb创建一个初始化器.此文件将仅更改JSON请求的参数解析行为(JSON请求必须具有请求标头Content-Type：application / json).

找到您的Rails版本并选择下面相应的部分(在Gemfile.lock中找到您的Rails版本)：

仅适用于Rails 5

对于Rails 5,将骆驼案例的param键转换为snake-case,将其放在初始化器中：

# File: config/initializers/json_param_key_transform.rb
# Transform JSON request param keys from JSON-conventional camelCase to
# Rails-conventional snake_case:
ActionDispatch::request.parameter_parsers[:json] = -> (raw_post) {
  # Modified from action_dispatch/http/parameters.rb
  data = ActiveSupport::JSON.decode(raw_post)
  data = {:_json => data} unless data.is_a?(Hash)

  # Transform camelCase param keys to snake_case:
  data.deep_transform_keys!(&:underscore)
}

对于Rails 4.2(也许更早版本)

对于Rails 4.2(也许更早的版本),要将camel-case参数键转换为snake-case,请将其放在初始化程序中：

# File: config/initializers/json_param_key_transform.rb
# Transform JSON request param keys from JSON-conventional camelCase to
# Rails-conventional snake_case:
Rails.application.config.middleware.swap(
  ::ActionDispatch::ParamsParser,::ActionDispatch::ParamsParser,::Mime::JSON => Proc.new { |raw_post|

    # Borrowed from action_dispatch/middleware/params_parser.rb except for
    # data.deep_transform_keys!(&:underscore) :
    data = ::ActiveSupport::JSON.decode(raw_post)
    data = {:_json => data} unless data.is_a?(::Hash)
    data = ::ActionDispatch::request::Utils.deep_munge(data)

    # Transform camelCase param keys to snake_case:
    data.deep_transform_keys!(&:underscore)

    data.with_indifferent_access
  }
)

所有Rails版本的最后一步

重新启动rails服务器.