Rails - Sep 2006 - Help: error with example in "RJS Templates for Rails" book

Hi,

I''m running through the examples in Cody Fauser''s "RJS
Templates for
Rails" PDF and have hit a small snag.

Have implemented the first part of the expense tracker app, up to the 
section about FireBug.  All is OK if I try the show view and add an 
expense from within Mozilla Firefox.  However, if I try it from within 
IE and add an expense, I get a pop-up window
    RJS error:
    [object Error]

then after clicking OK get another pop-up with
    new Insertion.bottom("expenses", "<tr
id=\"expense-17\">
      <td>test</td>
      <td class=\"amount\">200.00</td>
    </tr>");
    new Effect.Highlight("expense-17",{});
    Form.reset("expense-form");

If I refresh the show page the new entry is shown (i.e. made it into the 
d/b)

I certainly don''t know enough about JS to work out what might be wrong 
with the above specific to IE.
Any one else had this issue or know why this might be happening?

Cheers,
Karen

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The popups are just debug RJS, basically it tries to run the javascript and
if it fails, an alert is called with the code it tried to run. Make sure
that the elements you are tryinig to access (expenses, expense-17) are set
up correctly (names vs ids). IE might act differently than Firefox (I
can''t
remember right off hand) when it comes to accessing DOM elements through
id''s or name''s. I''d have to see the accompaning HTML
to know for sure.

Jason

On 9/7/06, Karen Jenkin
<rails-mailing-list-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
wrote:
>
>
> Hi,
>
> I''m running through the examples in Cody Fauser''s
"RJS Templates for
> Rails" PDF and have hit a small snag.
>
> Have implemented the first part of the expense tracker app, up to the
> section about FireBug.  All is OK if I try the show view and add an
> expense from within Mozilla Firefox.  However, if I try it from within
> IE and add an expense, I get a pop-up window
>     RJS error:
>     [object Error]
>
> then after clicking OK get another pop-up with
>     new Insertion.bottom("expenses", "<tr
id=\"expense-17\">
>       <td>test</td>
>       <td class=\"amount\">200.00</td>
>     </tr>");
>     new Effect.Highlight("expense-17",{});
>     Form.reset("expense-form");
>
> If I refresh the show page the new entry is shown (i.e. made it into the
> d/b)
>
> I certainly don''t know enough about JS to work out what might be
wrong
> with the above specific to IE.
> Any one else had this issue or know why this might be happening?
>
> Cheers,
> Karen
>
> --
> Posted via http://www.ruby-forum.com/.
>
> >
>

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Jason Roelofs wrote:
> The popups are just debug RJS, basically it tries to run the javascript 
> and
> if it fails, an alert is called with the code it tried to run. Make sure
> that the elements you are tryinig to access (expenses, expense-17) are 
> set
> up correctly (names vs ids). IE might act differently than Firefox (I 
> can''t
> remember right off hand) when it comes to accessing DOM elements through
> id''s or name''s. I''d have to see the accompaning
HTML to know for sure.
> 
> Jason
The code is pulled straight from the book, so hope it''s OK to reproduce
a snippet of the code here :-)

In the show view, have:
<h1><%= @project.name %></h1>
<h2>Expenses</h2>
<table id="expenses">
 <tr><th>Description</th><th
class="amount">Amount</th></tr>
 <%= render :partial => ''expenses/expense'', :collection
=>
@project.expenses %>
</table>
<%= render :partial => ''expenses/new'' %>

In the expense partial have:
<tr id="expense-<%= expense.id %>">
 <td><%=h expense.description %></td>
 <td class="amount"><%=h
number_with_precision(expense.amount, 2)
%></td>
</tr>

And in the new partial:
<div id="new-expense">
<h3>Add an expense</h3>
<% form_remote_for :expense,
                   Expense.new,
                   :url => hash_for_expenses_url(:project => @project,
                                                 :action =>
''new''),
                   :html => { :id => ''expense-form'' } do
|f| %>
  <label
for="expense_description">Description:</label><br />
  <%= f.text_field ''description'', :size => 60
%><br />
  <label for="expense_amount">Amount:</label><br />
  <%= f.text_field ''amount'', :size => 10 %><br
/><br />
  <%= submit_tag ''Add Expense'' %>
<% end %>
</div>

So you can see how the DOM ids/names are setup.  Does this highlight 
what might be the cause?
(Therefore, the error I first posted relates to me adding a new expense 
which ends up with an id of 17.)

Thanks
Karen

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