A question about ajax

rubyonrails-talk
1

I defines a partial see below: <%=   puts @project.version   text_field_tag "project_version", @project.version %>

I want the project version update-to-date. The first line can print the correct version value but the text field doesn't refresh to the new version.

2

Hi,

First of all, if you want to use puts in your views, use <% %> tags rather than <%= %> tags. Secondly, if you load your partials once you have your data object(@project) with appropriate value your page should display the same. But if you change the value of @project.version after the partial is loaded, it would not be reflected on the page until you reload the particular div which has the text field tag with the partial.

-NAYAK

3

NAYAK wrote:

First of all, if you want to use puts in your views, use <% %> tags rather than <%= %> tags.

    I defines a partial see below:     <%=      puts @project.version      text_field_tag "project_version", @project.version     %>

The above will puts the @project.version to the STDOUT stream, then will return the text_field_tag into the <%= %> location.

This is a subtle hair to split (and 'p' is more useful than 'puts' there), but debugging out of the top of a <%= %>, while expressing its last line, is very common...

4

Vishwanath Nayak wrote:

Hi,

First of all, if you want to use puts in your views, use <% %> tags rather than <%= %> tags. Secondly, if you load your partials once you have your data object(@project) with appropriate value your page should display the same. But if you change the value of @project.version after the partial is loaded, it would not be reflected on the page until you reload the particular div which has the text field tag with the partial.

-NAYAK

On Tue, Dec 30, 2008 at 6:42 PM, Zhao Yi

Hi,

This is my controller code:

def update_project_selection

   @project = Project.find(:all,:conditions=>"name='#{selected_project}' ")    render :partial => "project_version", :layout=>false end

I update the @project object before load the partial. Why does the page display the same value?

Below is the view page:

<%=         select_tag:project_selection,options_for_select(@project_names) %>

<%=   observe_field :project_selection,     :frequency => 0.5,     :update => 'ajaxWrapper',     :url => {:action => 'update_project_selection'},     :with => "'project_selection='+encodeURIComponent(value)" %>

5

I know what the problem. I set up a wrong update value in observe_field element.