Ruby on Rails在应用程序控制器中访问参数哈希的内容

Question

I am trying to access the values stored in params hash from ApplicationController class directly.How can I do it? Foreaxmple:

 def setParams
 @parameters=params ???
 end

Answer 1

The univesal variable to get the ruby params is:

params

This will return the hash of parameters from the request that you can see in the server log.

To access it you just need to use:

def set_params #use ruby notation for methods which is underscore and _
 @parameters=params["key"]
end

Note that the key should be defined, as long as the incoming parameters for html view includes the codification: utf8, and the csrf token.

If you want to access to the full request:

def set_params
  @request = request
end

Answer 2

class ApplicationController < ActionController::Base
  before_filter :handle_params

  def handle_params
    my_param_key = params[:my_param_key]
  end
end

Hope this helps someone starting to code on ruby!