Ajax Sort of Working. Model being saved but view not being updated

I am trying to create a model and update the page element with ajax.
The model is being saved and committed to the database. However the
view just sits there and does nothing. If I refresh the page manually,
the new model is there.

The error log:

ActionView::TemplateError (You have a nil object when you didn’t
expect it!
The error occurred while evaluating nil.created_at) on line #4 of
pizzas/_pizza_comment_item.html.erb:
1:


2:
3:
4:
6:
7:

Controller:

def show
@user_id = session[:user]
@user = User.find(@user_id)
@pizza = Pizza.find(params[:id], :conditions => {:user_id =>
@user_id})
@pizza_comments = PizzaComment.find(:all, :conditions => {:pizza_id
=> @pizza, :user_id => @user_id}, :order => “created_at DESC”)
end

def add_pizza_comment
@user_id = session[:user]
@user = User.find(@user_id)

@pizza_comment = PizzaComment.create!(params[:pizza_comment])
render :update do |page|
page.replace_html(“pizza_comment”, :partial =>
“pizza_comment”, :object => @pizza_comment)
end
end

_pizza_comment_item.html.erb

<%=
pizza_comment_item.created_at.strftime(’%B %d, %Y - %H:%M %p’ ) %></
td>
5:
<%= pizza_comment_item.comment
%>
<%= pizza_comment_item.created_at.strftime('%B %d, %Y - %H:%M %p' ) %> <%= pizza_comment_item.comment %>

pizza_comment.html.erb

History

<%= render :partial => "pizza_comment_item", :collection => @pizza_comments %>

show.html.erb

<%= render(:partial => "pizza_comment", :object => @pizza_comment)%>

<% form_remote_tag :url => { :action => ‘add_pizza_comment’ } do %>
<%= text_field ‘pizza_comment’, ‘comment’ %>
<%= hidden_field ‘pizza_comment’, ‘user_id’, :value => “1” %>
<%= hidden_field ‘pizza_comment’, ‘pizza_id’, :value => “2”%>
<%= submit_tag ‘Add Comment’ %>

<% end %>

On 25 Apr 2008, at 19:47, Keaja wrote:

History

<%= render :partial => "pizza_comment_item", :collection => @pizza_comments %>

Your add_pizza_comment action renders the pizza_comment partial, which
references @pizza_comments. That action doesn’t defined @pizza_comments

Fred

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