Called id for nil, which would mistakenly be 4 -- if you really wanted the id of nil, use object_id

gistfile1.txt

Called id for nil, which would mistakenly be 4 -- if you really wanted the id of nil, use object_id

######### _stars.html.erb  ###################

<div id="starRating">
	<%= form_for(rating_ballot, :html => { :class => 'rating_ballot' }) do |f| %>
	    <%= f.label("value_1", content_tag(:span, '1'), {:class=>"rating", :id=>"1"}) %>
	    <%= radio_button_tag("rating[value]", 1, current_user_rating == 1, :class => 'rating_button') %>
	    <%= f.label("value_2", content_tag(:span, '2'), {:class=>"rating", :id=>"2"}) %>
	    <%= radio_button_tag("rating[value]", 2, current_user_rating == 2, :class => 'rating_button') %>
	    <%= f.label("value_3", content_tag(:span, '3'), {:class=>"rating", :id=>"3"}) %>
	    <%= radio_button_tag("rating[value]", 3, current_user_rating == 3, :class => 'rating_button') %>
	    <%= f.label("value_4", content_tag(:span, '4'), {:class=>"rating", :id=>"4"}) %>
	    <%= radio_button_tag("rating[value]", 4, current_user_rating == 4, :class => 'rating_button') %>
	    <%= f.label("value_5", content_tag(:span, '5'), {:class=>"rating", :id=>"5"}) %>
	    <%= radio_button_tag("rating[value]", 5, current_user_rating == 5, :class => 'rating_button') %>

	    <%= hidden_field_tag(:fable_id, @fable.id) %>
	    <%= f.submit :Submit %>
	<% end %>
</div>

###### ratings_controller.rb  ######################


class RatingsController < ApplicationController
   before_filter :authenticate_user!

   def create
     @fable = Fable.find_by_id(params[:fable_id])
     @rating = Rating.new(params[:rating])
     @rating.fable_id = @fable.id
     @rating.user_id = current_user.id
    
     if @rating.save
         respond_to do |format|
             format.html { redirect_to fable_path(@fable), :notice => "Your rating has been saved" }
             format.js
         end
     end     
   end

   def update
     @fable = Fable.find_by_id(params[:fable_id])
     @rating = current_user.ratings.find_by_fable_id(@fable.id)
     if @rating.update_attributes(params[:rating])
        respond_to do |format|
            format.html { redirect_to fable_path(@fable), :notice => "Your rating has been updated" }
            format.js
        end
     end
   end
end

####### _fable.html.erb #########

<% if signed_in? && fable.user == current_user %>

	<div id="homeFables">
		  <ul>
			<div id="fableShow" class="rounded-corners-mild">
				<div id="controlPanel" class="gravatar">
					<span> <%= link_to gravatar_for(fable.user, :size => '90'), fable.user %></span>
				    <li id="fableUserName"><%= fable.user.name %></li>
				    <li id="twitterFable"><%= link_to "@#{fable.user.twitter}", "http://twitter.com/#{fable.user.twitter}" %></li>
				    <li id="fableEdit"><%= link_to "edit fable", "/editor" + "/fables" + "/#{fable.id}", id: "edit_link", data: {save_url: mercury_update_fable_path(fable)} %></li>
				    <li> <%= render 'fables/stars' %> </li>
				</div>
			    <div id="fableCore">
				  <li><%= link_to(fable) do %>
				          <span class="fableTitle"><%= fable.title %> </span>
					      <span id="fableContent" class="mercury-region" data-type="editable"><%= raw fable.content %></span><br />
					      <span style="font-size:65%; float:right;"><%= fable.created_at %> </span><br />
				      <% end %>
				  </li> <br />
				</div>
	      </div>
		  </ul>
	</div>

<% else %>

	<div id="homeFables">
		  <ul>
			<div id="fableShow" class="rounded-corners-mild">
				<div id="controlPanel" class="gravatar">
					<span> <%= link_to gravatar_for(fable.user, :size => '90'), fable.user %></span>
				    <li id="fableUserName"><%= fable.user.name %></li>
				    <li id="twitterFable"><%= link_to "@#{fable.user.twitter}", "http://twitter.com/#{fable.user.twitter}" %></li>
				    <li><%= render 'fables/stars' %></li>
				</div>
			    <div id="fableCore">
				  <li><%= link_to(fable) do %>
				          <span class="fableTitle"><%= fable.title %> </span>
					      <span class="fableContent"><%= raw fable.content %></span><br />
					      <span style="font-size:65%; float:right;"><%= fable.created_at %></span><br />
				      <% end %>
				  </li> <br />
				</div>
	      </div>
		  </ul>
	</div>
	
<% end %>