Rails: How do I re-render a partial view on a page? - ruby-on-rails

Question

I have a webpage with a partial view that has a button and displays some information. When the user clicks the button in this partial view, I need to be able to update that partial view from the controller within the action that gets called. Specifically, there is a string that I want to update. Here is my code so far, but it's not working..
partial view (_printLabel.rhtml)
<% if #printAsinEnabled %>
<%= check_box_tag(:needPrint, :needPrint, false,
:onchange => "if (this.checked) $('printLabelAction').show(); else $('printLabelAction').hide();") %>
<%=_('Need to print label?')%><br /><br />
<div id="printLabelAction" class="action" style="display:none;">
<% onPrintLabelClick = generateAjaxRequest(
{:controller => #controller.controller_name,
:action => 'processPrintLabelRequest',
:creturnWipItemId => creturnWipItemId,
:barcode => collectedItemData.fnsku,
:title => asinInfo["title"]},
["parameters: Form.serializeElements([$('printerAddress'),$('printerRemote_true'),$('printerRemote_false')])"]) %>
<%=_('Printing')%>: <%= collectedItemData.fnsku %> <br /> <br />
<%= radio_button_tag(:printerRemote, :false, !session[:printRemote]) %>
<label for="printerRemote_false"><%=_('Local Printer')%></label> <br />
<%= radio_button_tag(:printerRemote, :true, session[:printRemote]) %>
<label for="printerRemote_true"><%=_('Remote Printer')%> - <%=_('Printer Address')%>:</label>
<%= text_field_tag(:printerAddress, session[:printerAddress],
:onchange => onPrintLabelClick,
:onclick => "$('printerRemote_true').checked = true")%> <br />
<div style="text-align:right;">
<%= button_to_function(_("Print Label"), onPrintLabelClick) %>
</div>
<%=_('Error?')%>: <%= errorMessage %> <br /> <br />
</div>
Here is the div where it gets rendered originally:
<div id="Block_asinSummary" class="block">
...
...
<td height="200px" width ="70%">
<%= link_to asinInfo["title"], asinInfo["link"], :target => "_blank" %><br/><br/>
<% if !asinInfo["clothingSize"].nil? %>
<b><%= _('Size')%>:&nbsp</b> <%= asinInfo["clothingSize"]%><br>
<% end %>
<font size='1'>
<% sku = collectedItemData.displaySku %>
<% if sku != collectedItemData.asin%>
<b>SKU:</b> <%= sku %><br>
<% else %>
<b>ASIN:</b> <%= collectedItemData.asin %>
<% end %>
<%= render(:partial => 'printLabel', :locals => { :creturnWipItemId => creturnWipItemId, :collectedItemData => collectedItemData, :asinInfo => asinInfo, :errorMessage => "HI" })%>
</font>
</td>
</tr>
</table>
...
...
<% end %>
And here is the controller code that is supposed to update "errorMessage" with a new string when clicked:
render(:partial => 'printLabel', :layout => false, :locals => { :creturnWipItemId => creturnWipItemId, :collectedItemData => #collectedItemData, :asinInfo => asinInfo, :errorMessage => "Bye" })
I am not seeing any errors from this, but the errorMessage string is not updating from "HI" to "Bye".

Answer 1

You can't call render partial from your controller. Instead, render the template and pass a different error message to the partial using an instance variable.