login_controller.rb

class LoginController < ApplicationController
  skip_before_filter :check_authentication, :only => :index

  def index
    respond_with User.where(login_params)
  end  
  
  private
  def login_params
    params.permit(:email, :password)
  end
end

trace

Started POST "/login" for 127.0.0.1 at 2013-08-10 01:35:01 +0530
Processing by LoginController#index as */*
  Parameters: {"{\"email\": \"admin@example.com\", \"password\": \"admin\"}"=>"[FILTERED]"}
Unpermitted parameters: {"email": "admin@example.com", "password": "admin"}
Completed 404 Not Found in 66ms

ActiveRecord::RecordNotFound (Couldn't find User without an ID):
  app/controllers/login_controller.rb:5:in `index'


  Rendered /home/abhishek/.rvm/gems/jruby-1.7.4/gems/actionpack-4.0.0/lib/action_dispatch/middleware/templates/rescues/_source.erb (5.0ms)
  Rendered /home/abhishek/.rvm/gems/jruby-1.7.4/gems/actionpack-4.0.0/lib/action_dispatch/middleware/templates/rescues/_trace.erb (5.0ms)
  Rendered /home/abhishek/.rvm/gems/jruby-1.7.4/gems/actionpack-4.0.0/lib/action_dispatch/middleware/templates/rescues/_request_and_response.erb (4.0ms)
  Rendered /home/abhishek/.rvm/gems/jruby-1.7.4/gems/actionpack-4.0.0/lib/action_dispatch/middleware/templates/rescues/diagnostics.erb within rescues/layout (36.0ms)