Rails - Apr 2008 - 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: <table>
2:
3: <tr>
4:      <td
class="extend_td_time"><%pizza_comment_item.created_at.strftime(''%B
%d, %Y - %H:%M %p'' ) %></
td>
5:      <td class="second_td_comment"><%=
pizza_comment_item.comment
%></td>
6: </tr>
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

<table>

<tr>
	<td
class="extend_td_time"><%pizza_comment_item.created_at.strftime(''%B
%d, %Y - %H:%M %p'' ) %></
td>
	<td class="second_td_comment"><%= pizza_comment_item.comment
%></td>
</tr>

</table>



pizza_comment.html.erb

<h3>History</h3>
<div id="show_comment_list">
	<%= render :partial => "pizza_comment_item", :collection =>
@pizza_comments %>
</div>
<p></p>




show.html.erb

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

	</div>

	<% 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 %>


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On 25 Apr 2008, at 19:47, Keaja wrote:
>
> 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.
>
>
> 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.html.erb
>
> <h3>History</h3>
> <div id="show_comment_list">
> 	<%= render :partial => "pizza_comment_item", :collection
=>
> @pizza_comments %>
> </div>
> <p></p>
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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