looking for a saver way then hidden fields

form

<h3>Lets do a reservation </h3>
<% unless current_user.blank? %>
  <%= form_for @reservation, :url => make_a_booking_path, :html => { :class => 'form-horizontal' } do |f|  %>
   <% if @reservation.errors.any? %>
      <div id="errorExplanation">
        <h2><%= pluralize(@reservation.errors.count, "error") %> prohibited this reservation from being saved:</h2>
        <ul>
          <% @reservation.errors.full_messages.each do |message| %>
            <li><%= message %></li>
          <% end %>
        </ul>
      </div>
    <% end %>
    <%= f.hidden_field :event_id, value: @event.id %>
    <%= f.hidden_field :user_id, value: current_user.id  %>
    <div class="form-group">
      <%= f.label :note, :class => 'control-label' %><div class="controls">
      <%= f.text_field :note, :class => 'form-control' %>
      </div>
    </div>
    <%= f.submit "save", :class => 'btn btn-primary' %>

  <% end %><!--end form for booking -->
<% else %>
<p>
  Please log in to make a reservation!
</p>


  <%= form_for(:user, :url => session_path(:user)) do |f| %>
    <%= f.text_field :email %>
    <%= f.password_field :password %>
    <%= f.check_box :remember_me %>
    <%= f.label :remember_me %>
    <%= f.submit 'Sign in' %>
  <%= link_to "Forgot your password?", new_password_path(:user) %>
  <% end %>

<% end %> <!-- end reservation -->
<%= debug @reservation %>

gistfile1.rb

class PagesController < ApplicationController

  def clubs
    @clubs = Club.all
  end

  def club
    @club = Club.find(params[:id])
  end

  def events
    @events = Event.all
  end

  def event
    @event = Event.find(params[:id])
    @reservation = Reservation.new()
  end

  def make_a_booking
    @reservation = Reservation.new(reservation_params)
    respond_to do |format|
      if @reservation.save
        format.html {redirect_to :back, notice: "Reservation was successfully created."}
      else
        format.html {redirect_to :back, alert: "Something went wrong. Your Reservation was not successfully created."}
      end
    end
  end


  def index
  end

private

def reservation_params
  params.require(:reservation).permit(:user_id, :event_id, :note )
end


end

gistfile2.txt

 if I do 

 def event
    @event = Event.find(params[:id])
    @reservation = Reservation.new(user_id: current_user.id, event_id: @event.id)
  end
  
and no hidden fields then the params are shown in debug, but when it comes to save the params are gone