mysql - Using AJAX POST from javascript to Rails 4 controller with Strong parameter -

i'm newbie rails

my purpose insert song_id , title received javascript via ajax post database (mysql)

in javascript file

var song_id = "23f4"; var title = "test";  $( document ).ready( function() { jquery.ajax({       url: 'create',       data: "song_id=" + song_id + "&title=" + title,       type: "post",       success: function(data) {         alert("successful");       },       failure: function() {         alert("unsuccessful");       }     });  } ); 

in editor_controller.rb

class editorcontroller < applicationcontroller    def new     @song = song.new   end    def create     logger.debug("#{params[:song_id]}")     logger.debug("#{params[:title]}")     @song = song.new(song_params)      if @song.save       redirect_to root_path     else       flash[:notice_song_failed] = true       redirect_to root_path     end    end    private      def song_params     params.require(:song).permit(:song_id, :title)   end 

problem when running rails app code, console notices me

actioncontroller::parametermissing @ /editor/create

param missing or value empty: song

i'm trying use

private  def song_params   params.require(:song).permit(params[:song_id], params[:title]) end 

but doesn't work , notices me same, in terminal log told me below

started post "/editor/create" ::1 @ 2015-04-01 01:07:23 +0700

processing editorcontroller#create /

parameters: {"song_id"=>"23f4", "title"=>"test"}

23f4

test

completed 400 bad request in 1ms

missed in code, advance.

you not sending song parameter @ all. looks need update data line in jquery.ajax call include song parameter so:

data: {song: {song_id: song_id, title: title}}